Search for Dark Matter in Events with Missing Transverse Momentum and a Higgs Boson Decaying to Two Photons in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector

EUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN)

CERN-PH-EP-2015-120

Submitted to: Phys. Rev. Lett.

Search for Dark Matter in Events with Missing Transverse

Momentum and a Higgs Boson Decaying to Two Photons in

pp

Collisions at

√

s = 8

TeV with the ATLAS Detector

The ATLAS Collaboration

Abstract

Results of a search for new phenomena in events with large missing transverse momentum and a

Higgs boson decaying to two photons are reported. Data from proton–proton collisions at a

center-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb

−1

have been collected

with the ATLAS detector at the LHC. The observed data are well described by the expected Standard

Model backgrounds. Upper limits on the cross section of events with large missing transverse

mo-mentum and a Higgs boson candidate are also placed. Exclusion limits are presented for models of

physics beyond the Standard Model featuring dark-matter candidates.

c

2016 CERN for the benefit of the ATLAS Collaboration.

Reproduction of this article or parts of it is allowed as specified in the CC-BY-3.0 license.

Search for Dark Matter in Events with Missing Transverse Momentum and a Higgs

Boson Decaying to Two Photons in pp Collisions at

√

s = 8 TeV with the ATLAS

Detector

ATLAS Collaboration

(Dated: March 15, 2016)

Results of a search for new phenomena in events with large missing transverse momentum and a Higgs boson decaying to two photons are reported. Data from proton–proton collisions at a center-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb−1 have been collected with the ATLAS detector at the LHC. The observed data are well described by the expected Standard Model backgrounds. Upper limits on the cross section of events with large missing transverse momentum and a Higgs boson candidate are also placed. Exclusion limits are presented for models of physics beyond the Standard Model featuring dark-matter candidates.

PACS numbers: 14.80.Bn

Although the existence of dark matter (DM) is well established, nearly nothing is known of its underlying particle nature [1]. Many DM candidates have been pro-posed, and attempts made to connect them to physics beyond the Standard Model (SM) at the scale of elec-troweak symmetry breaking [2] that would naturally ac-commodate the observed relic density [3].

Collider searches for weakly interacting dark matter rely on the inferred observation of missing transverse

mo-mentum [4] Emiss

T recoiling against a visible final-state

object X, which may be a hadronic jet [5, 6], photon (γ) [7, 8], or W/Z boson [9–11]. The discovery of a Higgs boson [12, 13] (H) creates a new opportunity to search for

beyond-the-SM (BSM) physics giving rise to H + Emiss

T

signatures [14, 15]. In contrast to the aforementioned probes, the visible H boson is unlikely to be radiated from an initial-state quark or gluon. This has the

impor-tant consequence that the H + E_Tmiss signature directly

probes the structure of the effective DM–SM coupling; see Fig. 1.

If the mass of the DM particle is less than half of the

Higgs boson mass mH, the Higgs boson may decay

di-rectly to DM. Such decays have been searched for us-ing LHC data, and null results provide powerful con-straints on the invisible branching ratio of the Higgs bo-son in several different production modes including W H or ZH [11, 16, 17], and qqH [18, 19]. However, the mass

of the DM particle may be larger than mH/2, in which

case these searches are not sensitive, and approaches such

as analysis of H + Emiss

T events are required.

Two approaches are commonly used to model generic processes yielding a final state with a particle X recoiling against a system of noninteracting particles. One option is to use nonrenormalizable operators in an effective field theory (EFT), which is agnostic about the details of the theory at energies beyond the experimental sensitivity. Alternatively, simplified models that explicitly include the particles at higher masses can be used. The EFT

ap-H χ χ q, g q, g H, Z, γ, Z′_{, S, ...}

FIG. 1: Schematic diagram for production of DM particles χ in association with a Higgs boson in pp collisions, mediated by electroweak bosons (H, Z, γ) or new mediator particles such as a Z0or scalar singlet S. The gray circle denotes an effective interaction between DM, the Higgs boson, and other states.

proach is more model-independent, but is not valid when the typical momentum transfer approaches the scale of the high-mass particles that have been integrated out. Simplified models do not suffer from these concerns, but include more assumptions by design and are therefore less generic. The two approaches are thus complemen-tary and both are considered here.

In this Letter, results are reported from a search for

H + Emiss

T events in data collected by the ATLAS

detec-tor from pp collisions with center-of-mass energy √s =

8 TeV and corresponding to an integrated luminosity

of 20.3 fb−1, produced by the Large Hadron Collider.

The H _{→ γγ decay mode is used exclusively, as the}

small branching ratio is mitigated by the distinct dipho-ton resonance signature and the low expected number

of background events with significant Emiss

T [14].

AT-LAS measured previously the differential cross section of

H _{→ γγ production with respect to several kinematic}

quantities [20], including Emiss

T ; the search reported here

uses a subset of those data optimized for sensitivity to production of dark matter in association with a Higgs boson.

The ATLAS detector [21] is a multipurpose particle physics experiment with a forward-backward symmetric cylindrical geometry and nearly 4π coverage in solid

an-gle. Events were selected using a trigger that requires two

photons, with leading (subleading) ET> 35 (25) GeV.

A photon is reconstructed as a cluster of energy with |η| < 2.37 deposited in the electromagnetic calorimeter,

excluding the poorly instrumented region η_{∈ [1.37, 1.56].}

Clusters without matching tracks are classified as

uncon-verted photon candidates. The photon energy is

cor-rected by applying an energy calibration derived from

Z_{→ e}+e− decays in data and cross-checked with J/ψ_→

e+e− and Z _{→ ``γ decays in data [22]. Identification}

requirements are applied in order to reduce the

contam-ination dominantly from π0 or other neutral hadrons

decaying to two photons. The photon identification is based on the profile of the energy deposit in the first and second layers of the electromagnetic calorimeter. Pho-tons have to satisfy the ‘tight’ identification criteria of

Ref. [23]. They are also required to be isolated, i.e.

the energy in the calorimeters in a cone of size ∆R =

p(∆η)2_{+ (∆φ)}2 _{= 0.4 around the cluster barycenter,}

excluding the energy associated with the photon cluster, is required to be less than 6 GeV. This in-cone energy is corrected for the leakage of the photon energy and for the effects of multiple pp interactions in the same or neighboring bunch crossings superimposed on the hard physics process (referred to as pileup interactions) [24]. Finally, for each photon the scalar sum of the transverse

momenta pTof tracks originating from the diphoton

ver-tex with pT> 1 GeV and ∆R(track,cluster) < 0.2 must

be less than 2.6 GeV. The diphoton production vertex is selected from the reconstructed collision vertices using a neural-network algorithm as described in Ref. [23].

The momentum imbalance in the transverse plane is obtained from the negative vector sum of the recon-structed and calibrated electrons, muons, photons and jets and is referred to as missing transverse

momen-tum Emiss_T . The symbol E_Tmiss is used for its

magni-tude. Calorimeter energy deposits are associated with

a reconstructed and identified high-pT object in a

spe-cific order: photons with pT > 10 GeV, electrons with

pT> 10 GeV, and jets with pT> 20 GeV. Deposits not

associated with any such objects are also taken into

ac-count in the Emiss_T calculation [25] using an energy-flow

algorithm that considers calorimeter energy deposits as well as inner-detector tracks [26]. The energy resolution is typically 11% near the threshold at 100 GeV for the considered signal scenarios.

Quality requirements are applied to photon candidates in order to reject those arising from instrumental prob-lems. In addition, quality requirements are applied in order to remove jets arising from detector noise or out-of-time energy deposits in the calorimeter from cosmic rays or other noncollision processes [27].

Selected events are required to have a Higgs boson can-didate consisting of two photons with diphoton invariant

mass mγγ ∈ [105, 160] GeV with transverse momenta

satisfying leading (subleading) pγ_T > 0.35(0.25)mγγ. In

addition, large missing transverse momentum is required,

Emiss_T > 90 GeV, as well as large transverse momentum of

the γγ system, pγγ_T > 90 GeV in order to suppress

back-ground events where Emiss

T is caused by mismeasurement

of the energies of identified physics objects. These se-lection requirements were derived by optimizing the

ex-pected upper limits on H + Emiss

T production for the set

of models described below.

Contributions to the γγ + E_Tmiss sample from SM

pro-cesses include those that produce a Higgs boson in as-sociation with undetected particles (predominantly ZH

with Z _{→ ν ¯ν and W H with W → `ν) as well as}

non-resonant diphoton production (γγ, W γγ, Zγγ), W γ and Zγ production where an electron is misidentified as a photon, and photon+jet production in which the jet is misidentified as a photon.

Samples of simulated events are used in order to measure the efficiency of the selection for dark-matter models, as well as to estimate the contribution of SM

H + Emiss

T processes. Contributions from other

back-ground processes are estimated from mγγ sidebands in

the data.

Following the notation of Ref. [14], a set of EFT mod-els are considered in which the effective operator

La-grangian term can be written as _|χ|2_|H|2, ¯χiγ5χ|H|2,

χ†∂µχH†DµH, or ¯χγµχBµνH†DνH, where the DM field

χ is a scalar in the first case and a fermion in the

remain-ing cases and Bµν is the U (1)Y field strength tensor. The

interactions of SM and DM particles are described by two

parameters: the DM particle mass mχ and the

suppres-sion scale Λ of the heavy mediator that is integrated out of the EFT. In a theory that is valid to arbitrary energies (ultraviolet complete), the contact interaction would be replaced by an interaction via an explicit mediator V .

In addition, simplified models [14] with a massive

vector (Z0), or a scalar (S) intermediate boson are

tested. All H + E_Tmiss DM models are generated

with Madgraph5 [28] version 1.4.8.4, with shower-ing and hadronization modeled with Pythia8 [29] ver-sion 1.6.5 using the AU2 parameter settings [30]; the MSTW2008LO [31] parton distribution function (PDF)

set is used. Values of mχ from 1 to 1000 GeV are

con-sidered. Production of ZH and W H is modeled with Pythia8 using CTEQ6L1 PDFs [32]. Samples are nor-malized to cross sections for W H and ZH production cal-culated at leading order (NLO) [33], and next-to-next-to-leading order (NNLO) [34] in QCD, respectively, with NLO electroweak corrections [35] in both cases.

Differing pileup conditions as a function of the instan-taneous luminosity are taken into account by overlaying simulated minimum-bias events generated with Pythia8 onto the hard-scattering process such that the observed distribution of the average number of interactions per

bunch crossing is reproduced. The simulated samples

are processed with a full ATLAS detector simulation [36] based on Geant4 [37] and a simulation of the trigger

[GeV] γ γ m 110 120 130 140 150 160 Events / GeV 0 1 2 3 4 5 6 7 8 9 Data Total Best-fit BSM Higgs SM Higgs Background fit ATLAS -1 dt = 20.3 fb L ∫ = 8 TeV, s = 125.4 GeV H m , γ γ → H , miss T H + E

FIG. 2: The best-fit background estimates to the 18 observed events are 14.2 ± 4.0 (continuum backgrounds) 1.1 ± 0.1 (SM Higgs boson backgrounds) and 2.7 ± 2.2 (BSM Higgs bo-son), including both statistical and systematic uncertainties. An unbinned maximum-likelihood fit to the spectrum is used to estimate the number of events from the continuum back-ground and from H → γγ decays; the individual components are shown as well as their sum.

system.

To distinguish contributions from processes that

in-clude H _{→ γγ decays from those that contribute to the}

continuum background, a localized excess of events is

searched for in the mγγ spectrum near the Higgs boson

mass, mH = 125.4 GeV. Probability distribution

func-tions that describe the H _{→ γγ resonance or the}

contin-uum background are defined in the range 105–160 GeV as described below. The contributions from each source are then estimated using an unbinned maximum-likelihood

fit to the observed mγγ spectrum.

The mγγ spectra of the signal models of H+DM

pro-duction and SM Higgs boson background processes are modeled with a double-sided Crystal Ball [38] function; the width and peak positions are fixed to values extracted from fits to simulated samples. An exponential function,

eamγγ _{with free parameter a is used to describe the m}

γγ

distribution of the continuum background. The chosen continuum fit function is validated using simulated sam-ples of the irreducible background processes and in three data samples adjacent to the signal region, but with

re-laxed requirements on Emiss

T , on p

γγ

T, or on photon

iden-tification. Results of the fit to data in the signal region are shown in Fig. 2.

Systematic uncertainties from various sources affect the number of SM Higgs boson events in the resonant background, the predicted shape and location of its peak, as well as the efficiency of the selection for the signal models considered.

The uncertainty on the integrated luminosity, 2.8%, is derived following the same methodology as that detailed in Ref. [39] using beam-separation scans. Uncertainties on the efficiency of the photon isolation requirement,

pho-ton identification requirement, and trigger selection are measured in an inclusive SM Higgs boson sample to be 2.8%, 2.1%, and 0.2%, respectively. Uncertainties in the photon energy scale and resolution lead to respective un-certainties of 11% and 0.3% in the position and width of

the H _{→ γγ peak. Additional uncertainties on the jet}

energy scale and resolution as well as the calibration of unclustered hadronic recoil energy contribute to

uncer-tainty in the Emiss

T , leading to 1.2% uncertainty on the

efficiency of the selection for the signal models from the

Emiss

T and p

γγ

T requirements. The impacts on the

selec-tion efficiency of the uncertainties on the levels of initial-state and final-initial-state radiation are assessed by varying the Pythia8 parameters, as in Ref. [10]; these are found to be typically at the level of 1%. The total uncertainty on the selection efficiency for peaking SM Higgs backgrounds and signal models is 4.0%.

The theoretical uncertainties on the W H and ZH pro-duction cross sections come from varying the renormal-ization and factorrenormal-ization scales and from uncertainties on the parton distribution functions [31, 40–42] follow-ing the PDF4LHC prescription. The Higgs boson decay branching fractions are taken from Refs. [43, 44] and their uncertainties from Refs. [45, 46]. The total theoretical

uncertainty on the H + E_Tmiss contribution is 6%.

The number of events observed in the data corresponds to a 1.4 σ deviation using the asymptotic formulae in Ref. [47]. As the events observed do not include a sta-tistically significant BSM component, the results are in-terpreted in terms of exclusions on models that would

produce an excess of H + Emiss

T events. Upper bounds,

detailed below, are calculated using a one-sided profile

likelihood ratio and the CLS technique [48, 49],

evalu-ated using the asymptotic approximation [47], which was ensured to be valid for the available number of events.

The most model-independent limits are those on the

fiducial cross section of H + Emiss

T events, including SM

and BSM components, σ_{×A, where σ is the cross section}

and A is the fiducial acceptance. The latter is defined using a selection identical to that defining the signal

re-gion but applied at particle level, where Emiss_T is the

vec-tor sum of the momenta of the noninteracting particles, photon isolation requirements are not applied, and a

sim-pler requirement on photon pseudorapidity_{|η| < 2.37 is}

made. The limit on σ_{× A is derived from a limit on the}

visible cross section σ_{×A×, where  is the reconstruction}

efficiency in the fiducial region. An estimate  = 56% is computed using the simulated signal samples described above with no quark or gluon produced from the main interaction vertex; the efficiencies vary across the set of models by less than 10%. The observed (expected) up-per limit on the fiducial cross section is 0.70 (0.43) fb at 95% confidence level (CL). These limits are applicable to

any model that predicts H + Emiss

T events in the fiducial

region and has similar reconstruction efficiency .

Limits on specific models of BSM H + Emiss

[fb] BSM, fid σ 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 ) BSM, fid σ ( λ -log 0 0.5 1 1.5 2 2.5 3 3.5 4 no systematic uncertainty theory uncert. SM σ including

fixed to theory calc.

SM σ ATLAS -1 Ldt = 20.3 fb ∫ = 8 TeV s = 125.4 GeV H m , γ γ → H , miss T E + H

FIG. 3: Profile likelihood ratio (λ) as a function of σBSM,fid,

the fiducial cross section for production of a BSM H+DM process in the γγ + EmissT channel taking into account the

contribution of the SM component. The solid blue likelihood curve shows that the number of events observed in the data corresponds to a 1.4 σ deviation using the asymptotic for-mulae in Ref. [47]. The dotted green likelihood curve only includes statistical uncertainties. The dashed red likelihood curve allows for modifications of the central value and uncer-tainty on the SM component as described in the text.

tion depend on the prediction of the H +Emiss_T component

produced via ZH or W H; calculations of this theoreti-cal quantity will improve with time and may depend on the details of a specific BSM theory. Following the pro-posal of Ref. [50], the profile likelihood ratio of the cross

section for BSM H+DM production in the γγ + Emiss

T

channel is provided with the SM component fixed to the central value of the theoretical calculation, which al-lows later reinterpretation for any modified prediction and uncertainty, as shown in Fig. 3. This approach re-quires knowing how a change in the SM-like component modifies the best-fit BSM component; in this case where the SM-like and BSM components are indistinguishable, ∆NBSM = −∆NSM-like. The limits on the parameters

of the specific BSM models considered in this Letter are calculated using the prediction and uncertainty for the SM component as described above.

Limits on DM production are derived from the

cross-section limits at a given DM mass mχ, and expressed

as 95% CL limits on the suppression scale Λ or coupling parameter λ for the effective field theory operators; see

Fig. 4 for limits for χ†_∂µ_χH†_D

µH and ¯χγµχBµνH†DνH

operators. For the lowest mχ region not excluded by

results from searches for invisible Higgs boson decays

near mχ = mH/2, values of Λ up to 6, 60, and 150

GeV are excluded for the ¯χiγ5χ|H|2, χ†∂µχH†DµH,

and ¯χγµ_χB

µνH†DνH operators, respectively; values of

λ above 25.6 are excluded for the_|χ|2

|H|2 _{operator. As}

discussed above, the effective field theory model becomes a poor approximation of an ultraviolet-complete model

[GeV] χ m 1 10 ₁₀2 3 10 [GeV] Λ Mass scale 20 40 60 80 100 120 140 160 180 200 220 ATLAS -1 = 20.3 fb t d L

∫

= 8 TeV s γγ → H , miss T E + H H ν HD µν B χ µ γ χ No truncation π = 4 g Trunc. = 1 g Trunc. [GeV] χ m 1 10 ₁₀2 3 10 [GeV] Λ Mass scale 1 10 2 10 3 10 4 10 5 10 ATLAS -1 = 20.3 fb t d L

∫

= 8 TeV s γγ → H , miss T E + H ) π > 4 g Non-perturbative ( inv) → Z BF( LUX H µ HD χ µ ∂ χ No truncation π = 4 g Trunc. = 1 g Trunc.

FIG. 4: Limits at 95% CL on the mass scale Λ as a function of the DM mass (mχ) for two of the four EFT models considered.

Solid black lines are due to H + ETmiss (this Letter); results

where EFT truncation is applied are also shown, assuming coupling values g =√gqgχ= 1, 4π. The g = 4π case overlaps

with the no-truncation result. The blue line indicates regions that fail the perturbativity requirement of g < 4π, the red line indicates regions excluded by Z boson limits [51] on the invisible branching fraction (BF), and the pink line indicates regions excluded by the LUX Collaboration [52].

containing a heavy mediator V when the momentum

transferred in the interaction, Qtr, is comparable to the

mass of the intermediate state mV = Λ√gqgχ [54, 55],

where gq and gχ represent the coupling of V to SM and

DM particles, respectively. To give an indication of the impact of the unknown ultraviolet details of the theory, limits are computed in which only simulated events with

Qtr = mχχ < mV are retained; these limits are shown

for values of √gqgχ = 1 or 4π in Fig. 4. This

proce-dure is referred to as truncation. In addition, limits are derived on coupling parameters for simplified models as shown in Fig. 5. For a vector-mediated model, limits

[GeV] χ m 1 10 ₁₀2 3 10 q g Coupling 4 − 10 3 − 10 2 − 10 1 − 10 1 10 2 10 3 10 4 10 ATLAS -1 = 20.3 fb t d L

∫

= 8 TeV s γγ → H , miss T E + H LUX = 1) χ g Monojet ( = 1 TeV Z' , m B Z' [GeV] χ m 2 10 103 ) mix θ sin( × κ 1 − 10 1 10 2 10 3 10 ATLAS -1 = 20.3 fb t d L

∫

= 8 TeV s γγ → H , miss T E + H ) π > 4 g Non-perturbative ( inv) → H BF( LUX = 1 TeV S m

FIG. 5: Limits on coupling parameters for simplified models with a heavy mediator with mass of 1 TeV. All constraint contours exclude larger couplings or mixing angles. Regions excluded due to perturbativity arguments are indicated; red, green and pink contours denote results from collider searches for invisible H decays [53], and monojet [6] searches, and the LUX Collaboration [52], respectively.

assuming maximal coupling gχ to dark matter. For the

scalar-mediated model, limits are placed on the

param-eter κ_{× sin(θ}mix), where sin(θmix) is the mixing angle

between the scalar S boson and the Higgs boson, and κ is a scaling constant; however, current calculations [14]

of the gg_{→ HS production mode may be overestimated}

due to approximations made in evaluating the top-quark loop.

In conclusion, a search for DM produced in association with a Higgs boson decaying to two photons has been conducted. Prior to these results, no bounds have been placed by collider experiments on the H+DM models discussed here. In addition, upper limits are placed on the cross section of events with large missing transverse momentum and a Higgs boson.

We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET, ERC

and NSRF, European Union; IN2P3-CNRS,

CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT and NSRF, Greece; ISF, MINERVA, GIF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; BRF and RCN, Norway; MNiSW and NCN, Poland; GRICES and FCT, Portugal; MNE/IFA, Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MIZ, Slove-nia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Tai-wan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing sup-port from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facili-ties at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide.

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The ATLAS Collaboration

G. Aad85_{, B. Abbott}113_{, J. Abdallah}151_{, O. Abdinov}11_,

R. Aben107_{, M. Abolins}90_{, O.S. AbouZeid}158_,

H. Abramowicz153_{, H. Abreu}152_{, R. Abreu}30_,

Y. Abulaiti146a,146b_{, B.S. Acharya}164a,164b,a_,

L. Adamczyk38a_{, D.L. Adams}25_{, J. Adelman}108_,

S. Adomeit100_{, T. Adye}131_{, A.A. Affolder}74_,

T. Agatonovic-Jovin13_{, J.A. Aguilar-Saavedra}126a,126f_,

S.P. Ahlen22_{, F. Ahmadov}65,b_{, G. Aielli}133a,133b_,

H. Akerstedt146a,146b_{, T.P.A. ˚Akesson}81_{, G. Akimoto}155_,

A.V. Akimov96_{, G.L. Alberghi}20a,20b_{, J. Albert}169_,

S. Albrand55, M.J. Alconada Verzini71, M. Aleksa30,

I.N. Aleksandrov65, C. Alexa26a, G. Alexander153,

T. Alexopoulos10, M. Alhroob113, G. Alimonti91a,

L. Alio85, J. Alison31, S.P. Alkire35,

B.M.M. Allbrooke18_{, P.P. Allport}74_{, A. Aloisio}104a,104b_,

A. Alonso36_{, F. Alonso}71_{, C. Alpigiani}76_,

A. Altheimer35_{, B. Alvarez Gonzalez}30_,

D. ´Alvarez Piqueras167_{, M.G. Alviggi}104a,104b_,

B.T. Amadio15_{, K. Amako}66_{, Y. Amaral Coutinho}24a_,

C. Amelung23_{, D. Amidei}89_,

S.P. Amor Dos Santos126a,126c_{, A. Amorim}126a,126b_,

S. Amoroso48_{, N. Amram}153_{, G. Amundsen}23_,

C. Anastopoulos139_{, L.S. Ancu}49_{, N. Andari}30_,

T. Andeen35_{, C.F. Anders}58b_{, G. Anders}30_,

J.K. Anders74_{, K.J. Anderson}31_{, A. Andreazza}91a,91b_,

V. Andrei58a, S. Angelidakis9, I. Angelozzi107,

P. Anger44, A. Angerami35, F. Anghinolfi30,

A.V. Anisenkov109,c, N. Anjos12, A. Annovi124a,124b,

M. Antonelli47, A. Antonov98, J. Antos144b,

F. Anulli132a_{, M. Aoki}66_{, L. Aperio Bella}18_,

G. Arabidze90_{, Y. Arai}66_{, J.P. Araque}126a_,

A.T.H. Arce45_{, F.A. Arduh}71_{, J-F. Arguin}95_,

S. Argyropoulos42_{, M. Arik}19a_{, A.J. Armbruster}30_,

O. Arnaez30_{, V. Arnal}82_{, H. Arnold}48_{, M. Arratia}28_,

O. Arslan21_{, A. Artamonov}97_{, G. Artoni}23_{, S. Asai}155_,

N. Asbah42_{, A. Ashkenazi}153_{, B. ˚Asman}146a,146b_,

L. Asquith149_{, K. Assamagan}25_{, R. Astalos}144a_,

M. Atkinson165_{, N.B. Atlay}141_{, B. Auerbach}6_,

K. Augsten128_{, M. Aurousseau}145b_{, G. Avolio}30_,

B. Axen15, M.K. Ayoub117, G. Azuelos95,d,

M.A. Baak30, A.E. Baas58a, C. Bacci134a,134b,

H. Bachacou136, K. Bachas154, M. Backes30,

M. Backhaus30, P. Bagiacchi132a,132b,

P. Bagnaia132a,132b, Y. Bai33a, T. Bain35,

J.T. Baines131_{, O.K. Baker}176_{, P. Balek}129_,

T. Balestri148_{, F. Balli}84_{, E. Banas}39_{, Sw. Banerjee}173_,

A.A.E. Bannoura175_{, H.S. Bansil}18_{, L. Barak}30_,

E.L. Barberio88_{, D. Barberis}50a,50b_{, M. Barbero}85_,

T. Barillari101_{, M. Barisonzi}164a,164b_{, T. Barklow}143_,

N. Barlow28_{, S.L. Barnes}84_{, B.M. Barnett}131_,

R.M. Barnett15_{, Z. Barnovska}5_{, A. Baroncelli}134a_,

G. Barone49_{, A.J. Barr}120_{, F. Barreiro}82_,

J. Barreiro Guimar˜aes da Costa57_{, R. Bartoldus}143_,

A.E. Barton72_{, P. Bartos}144a_{, A. Basalaev}123_,

A. Bassalat117, A. Basye165, R.L. Bates53,

S.J. Batista158, J.R. Batley28, M. Battaglia137,

M. Bauce132a,132b_{, F. Bauer}136_{, H.S. Bawa}143,e_,

J.B. Beacham111_{, M.D. Beattie}72_{, T. Beau}80_,

P.H. Beauchemin161_{, R. Beccherle}124a,124b_{, P. Bechtle}21_,

H.P. Beck17,f_{, K. Becker}120_{, M. Becker}83_{, S. Becker}100_,

M. Beckingham170_{, C. Becot}117_{, A.J. Beddall}19c_,

A. Beddall19c_{, V.A. Bednyakov}65_{, C.P. Bee}148_,

L.J. Beemster107_{, T.A. Beermann}175_{, M. Begel}25_,

J.K. Behr120_{, C. Belanger-Champagne}87_{, W.H. Bell}49_,

G. Bella153_{, L. Bellagamba}20a_{, A. Bellerive}29_,

M. Bellomo86_{, K. Belotskiy}98_{, O. Beltramello}30_,

O. Benary153, D. Benchekroun135a, M. Bender100,

K. Bendtz146a,146b, N. Benekos10, Y. Benhammou153,

E. Benhar Noccioli49, J.A. Benitez Garcia159b,

D.P. Benjamin45, J.R. Bensinger23, S. Bentvelsen107,

L. Beresford120, M. Beretta47, D. Berge107,

E. Bergeaas Kuutmann166_{, N. Berger}5_{, F. Berghaus}169_,

J. Beringer15_{, C. Bernard}22_{, N.R. Bernard}86_,

C. Bernius110_{, F.U. Bernlochner}21_{, T. Berry}77_,

P. Berta129_{, C. Bertella}83_{, G. Bertoli}146a,146b_,

F. Bertolucci124a,124b_{, C. Bertsche}113_{, D. Bertsche}113_,

M.I. Besana91a_{, G.J. Besjes}106_,

O. Bessidskaia Bylund146a,146b_{, M. Bessner}42_,

N. Besson136_{, C. Betancourt}48_{, S. Bethke}101_,

A.J. Bevan76_{, W. Bhimji}46_{, R.M. Bianchi}125_,

L. Bianchini23_{, M. Bianco}30_{, O. Biebel}100_,

S.P. Bieniek78, M. Biglietti134a,

J. Bilbao De Mendizabal49, H. Bilokon47, M. Bindi54,

S. Binet117, A. Bingul19c, C. Bini132a,132b,

C.W. Black150, J.E. Black143, K.M. Black22,

D. Blackburn138_{, R.E. Blair}6_{, J.-B. Blanchard}136_,

J.E. Blanco77_{, T. Blazek}144a_{, I. Bloch}42_{, C. Blocker}23_,

W. Blum83,∗_{, U. Blumenschein}54_{, G.J. Bobbink}107_,

V.S. Bobrovnikov109,c_{, S.S. Bocchetta}81_{, A. Bocci}45_,

C. Bock100_{, M. Boehler}48_{, J.A. Bogaerts}30_,

A.G. Bogdanchikov109_{, C. Bohm}146a_{, V. Boisvert}77_,

T. Bold38a_{, V. Boldea}26a_{, A.S. Boldyrev}99_,

M. Bomben80_{, M. Bona}76_{, M. Boonekamp}136_,

A. Borisov130_{, G. Borissov}72_{, S. Borroni}42_,

J. Bortfeldt100_{, V. Bortolotto}60a,60b,60c_{, K. Bos}107_,

D. Boscherini20a_{, M. Bosman}12_{, J. Boudreau}125_,

J. Bouffard2, E.V. Bouhova-Thacker72,

D. Boumediene34, C. Bourdarios117, N. Bousson114,

A. Boveia30, J. Boyd30, I.R. Boyko65, I. Bozic13,

J. Bracinik18, A. Brandt8, G. Brandt54, O. Brandt58a,

U. Bratzler156_{, B. Brau}86_{, J.E. Brau}116_,

H.M. Braun175,∗_{, S.F. Brazzale}164a,164c_,

K. Brendlinger122_{, A.J. Brennan}88_{, L. Brenner}107_,

R. Brenner166_{, S. Bressler}172_{, K. Bristow}145c_,

T.M. Bristow46_{, D. Britton}53_{, D. Britzger}42_,

F.M. Brochu28_{, I. Brock}21_{, R. Brock}90_{, J. Bronner}101_,

G. Brooijmans35_{, T. Brooks}77_{, W.K. Brooks}32b_,

J. Brosamer15_{, E. Brost}116_{, J. Brown}55_,

P.A. Bruckman de Renstrom39_{, D. Bruncko}144b_,

M. Bruschi20a, L. Bryngemark81, T. Buanes14,

Q. Buat142, P. Buchholz141, A.G. Buckley53,

S.I. Buda26a_{, I.A. Budagov}65_{, F. Buehrer}48_,

L. Bugge119_{, M.K. Bugge}119_{, O. Bulekov}98_{, D. Bullock}8_,

H. Burckhart30_{, S. Burdin}74_{, B. Burghgrave}108_,

S. Burke131_{, I. Burmeister}43_{, E. Busato}34_{, D. B¨uscher}48_,

V. B¨uscher83_{, P. Bussey}53_{, J.M. Butler}22_{, A.I. Butt}3_,

C.M. Buttar53_{, J.M. Butterworth}78_{, P. Butti}107_,

W. Buttinger25_{, A. Buzatu}53_{, A.R. Buzykaev}109,c_,

S. Cabrera Urb´an167_{, D. Caforio}128_{, V.M. Cairo}37a,37b_,

O. Cakir4a_{, P. Calafiura}15_{, A. Calandri}136_,

G. Calderini80_{, P. Calfayan}100_{, L.P. Caloba}24a_,

D. Calvet34, S. Calvet34, R. Camacho Toro49,

S. Camarda42, P. Camarri133a,133b, D. Cameron119,

L.M. Caminada15, R. Caminal Armadans12,

S. Campana30, M. Campanelli78, A. Campoverde148,

V. Canale104a,104b_{, A. Canepa}159a_{, M. Cano Bret}76_,

J. Cantero82_{, R. Cantrill}126a_{, T. Cao}40_,

M.D.M. Capeans Garrido30_{, I. Caprini}26a_,

M. Caprini26a_{, M. Capua}37a,37b_{, R. Caputo}83_,

R. Cardarelli133a_{, T. Carli}30_{, G. Carlino}104a_,

L. Carminati91a,91b_{, S. Caron}106_{, E. Carquin}32a_,

G.D. Carrillo-Montoya8_{, J.R. Carter}28_,

J. Carvalho126a,126c_{, D. Casadei}78_{, M.P. Casado}12_,

M. Casolino12_{, E. Castaneda-Miranda}145b_,

A. Castelli107_{, V. Castillo Gimenez}167_,

N.F. Castro126a,g_{, P. Catastini}57_{, A. Catinaccio}30_,

J.R. Catmore119, A. Cattai30, J. Caudron83,

V. Cavaliere165, D. Cavalli91a, M. Cavalli-Sforza12,

V. Cavasinni124a,124b, F. Ceradini134a,134b, B.C. Cerio45,

K. Cerny129, A.S. Cerqueira24b, A. Cerri149,

L. Cerrito76_{, F. Cerutti}15_{, M. Cerv}30_{, A. Cervelli}17_,

S.A. Cetin19b_{, A. Chafaq}135a_{, D. Chakraborty}108_,

I. Chalupkova129_{, P. Chang}165_{, B. Chapleau}87_,

J.D. Chapman28_{, D.G. Charlton}18_{, C.C. Chau}158_,

C.A. Chavez Barajas149_{, S. Cheatham}152_,

A. Chegwidden90_{, S. Chekanov}6_{, S.V. Chekulaev}159a_,

G.A. Chelkov65,h_{, M.A. Chelstowska}89_{, C. Chen}64_,

H. Chen25_{, K. Chen}148_{, L. Chen}33d,i_{, S. Chen}33c_,

X. Chen33f_{, Y. Chen}67_{, H.C. Cheng}89_{, Y. Cheng}31_,

A. Cheplakov65_{, E. Cheremushkina}130_,

R. Cherkaoui El Moursli135e_{, V. Chernyatin}25,∗_,

E. Cheu7, L. Chevalier136, V. Chiarella47,

J.T. Childers6, G. Chiodini73a, A.S. Chisholm18,

R.T. Chislett78, A. Chitan26a, M.V. Chizhov65,

K. Choi61, S. Chouridou9, B.K.B. Chow100,

V. Christodoulou78_{, D. Chromek-Burckhart}30_,

M.L. Chu151_{, J. Chudoba}127_{, A.J. Chuinard}87_,

J.J. Chwastowski39_{, L. Chytka}115_{, G. Ciapetti}132a,132b_,

A.K. Ciftci4a_{, D. Cinca}53_{, V. Cindro}75_{, I.A. Cioara}21_,

A. Ciocio15_{, Z.H. Citron}172_{, M. Ciubancan}26a_,

A. Clark49_{, B.L. Clark}57_{, P.J. Clark}46_{, R.N. Clarke}15_,

W. Cleland125_{, C. Clement}146a,146b_{, Y. Coadou}85_,

M. Cobal164a,164c_{, A. Coccaro}138_{, J. Cochran}64_,

L. Coffey23_{, J.G. Cogan}143_{, B. Cole}35_{, S. Cole}108_,

A.P. Colijn107_{, J. Collot}55_{, T. Colombo}58c_,

G. Compostella101, P. Conde Mui˜no126a,126b,

E. Coniavitis48, S.H. Connell145b, I.A. Connelly77,

S.M. Consonni91a,91b_{, V. Consorti}48_,

S. Constantinescu26a_{, C. Conta}121a,121b_{, G. Conti}30_,

F. Conventi104a,j_{, M. Cooke}15_{, B.D. Cooper}78_,

A.M. Cooper-Sarkar120_{, T. Cornelissen}175_,

M. Corradi20a_{, F. Corriveau}87,k_{, A. Corso-Radu}163_,

A. Cortes-Gonzalez12_{, G. Cortiana}101_{, G. Costa}91a_,

M.J. Costa167_{, D. Costanzo}139_{, D. Cˆot´e}8_{, G. Cottin}28_,

G. Cowan77_{, B.E. Cox}84_{, K. Cranmer}110_{, G. Cree}29_,

S. Cr´ep´e-Renaudin55_{, F. Crescioli}80_,

W.A. Cribbs146a,146b_{, M. Crispin Ortuzar}120_,

M. Cristinziani21, V. Croft106, G. Crosetti37a,37b,

T. Cuhadar Donszelmann139, J. Cummings176,

M. Curatolo47, C. Cuthbert150, H. Czirr141,

P. Czodrowski3, S. D’Auria53, M. D’Onofrio74,

M.J. Da Cunha Sargedas De Sousa126a,126b,

C. Da Via84_{, W. Dabrowski}38a_{, A. Dafinca}120_{, T. Dai}89_,

O. Dale14_{, F. Dallaire}95_{, C. Dallapiccola}86_{, M. Dam}36_,

J.R. Dandoy31_{, N.P. Dang}48_{, A.C. Daniells}18_,

M. Danninger168_{, M. Dano Hoffmann}136_{, V. Dao}48_,

G. Darbo50a_{, S. Darmora}8_{, J. Dassoulas}3_,

A. Dattagupta61_{, W. Davey}21_{, C. David}169_,

T. Davidek129_{, E. Davies}120,l_{, M. Davies}153_,

P. Davison78_{, Y. Davygora}58a_{, E. Dawe}88_{, I. Dawson}139_,

R.K. Daya-Ishmukhametova86_{, K. De}8_,

R. de Asmundis104a_{, S. De Castro}20a,20b_{, S. De Cecco}80_,

N. De Groot106, P. de Jong107, H. De la Torre82,

F. De Lorenzi64, L. De Nooij107, D. De Pedis132a,

A. De Salvo132a, U. De Sanctis149, A. De Santo149,

J.B. De Vivie De Regie117, W.J. Dearnaley72,

R. Debbe25_{, C. Debenedetti}137_{, D.V. Dedovich}65_,

I. Deigaard107_{, J. Del Peso}82_{, T. Del Prete}124a,124b_,

D. Delgove117_{, F. Deliot}136_{, C.M. Delitzsch}49_,

M. Deliyergiyev75_{, A. Dell’Acqua}30_{, L. Dell’Asta}22_,

M. Dell’Orso124a,124b_{, M. Della Pietra}104a,j_,

D. della Volpe49_{, M. Delmastro}5_{, P.A. Delsart}55_,

C. Deluca107_{, D.A. DeMarco}158_{, S. Demers}176_,

M. Demichev65_{, A. Demilly}80_{, S.P. Denisov}130_,

D. Derendarz39_{, J.E. Derkaoui}135d_{, F. Derue}80_,

P. Dervan74_{, K. Desch}21_{, C. Deterre}42_,

P.O. Deviveiros30_{, A. Dewhurst}131_{, S. Dhaliwal}23_,

A. Di Ciaccio133a,133b, L. Di Ciaccio5,

A. Di Domenico132a,132b, C. Di Donato104a,104b,

A. Di Girolamo30, B. Di Girolamo30, A. Di Mattia152,

B. Di Micco134a,134b, R. Di Nardo47, A. Di Simone48,

R. Di Sipio158_{, D. Di Valentino}29_{, C. Diaconu}85_,

M. Diamond158_{, F.A. Dias}46_{, M.A. Diaz}32a_,

E.B. Diehl89_{, J. Dietrich}16_{, S. Diglio}85_,

A. Dimitrievska13_{, J. Dingfelder}21_{, P. Dita}26a_,

S. Dita26a_{, F. Dittus}30_{, F. Djama}85_{, T. Djobava}51b_,

J.I. Djuvsland58a_{, M.A.B. do Vale}24c_{, D. Dobos}30_,

M. Dobre26a_{, C. Doglioni}49_{, T. Dohmae}155_,

J. Dolejsi129_{, Z. Dolezal}129_{, B.A. Dolgoshein}98,∗_,

M. Donadelli24d_{, S. Donati}124a,124b_{, P. Dondero}121a,121b_,

A.T. Doyle53, E. Drechsler54, M. Dris10, E. Dubreuil34,

E. Duchovni172, G. Duckeck100, O.A. Ducu26a,85,

D. Duda175_{, A. Dudarev}30_{, L. Duflot}117_{, L. Duguid}77_,

M. D¨uhrssen30_{, M. Dunford}58a_{, H. Duran Yildiz}4a_,

M. D¨uren52_{, A. Durglishvili}51b_{, D. Duschinger}44_,

M. Dyndal38a_{, C. Eckardt}42_{, K.M. Ecker}101_,

R.C. Edgar89_{, W. Edson}2_{, N.C. Edwards}46_,

W. Ehrenfeld21_{, T. Eifert}30_{, G. Eigen}14_,

K. Einsweiler15_{, T. Ekelof}166_{, M. El Kacimi}135c_,

M. Ellert166_{, S. Elles}5_{, F. Ellinghaus}83_{, A.A. Elliot}169_,

N. Ellis30_{, J. Elmsheuser}100_{, M. Elsing}30_,

D. Emeliyanov131_{, Y. Enari}155_{, O.C. Endner}83_,

M. Endo118, J. Erdmann43, A. Ereditato17, G. Ernis175,

J. Ernst2, M. Ernst25, S. Errede165, E. Ertel83,

M. Escalier117, H. Esch43, C. Escobar125, B. Esposito47,

A.I. Etienvre136, E. Etzion153, H. Evans61,

A. Ezhilov123_{, L. Fabbri}20a,20b_{, G. Facini}31_,

R.M. Fakhrutdinov130_{, S. Falciano}132a_{, R.J. Falla}78_,

J. Faltova129_{, Y. Fang}33a_{, M. Fanti}91a,91b_{, A. Farbin}8_,

A. Farilla134a_{, T. Farooque}12_{, S. Farrell}15_,

S.M. Farrington170_{, P. Farthouat}30_{, F. Fassi}135e_,

P. Fassnacht30_{, D. Fassouliotis}9_{, M. Faucci Giannelli}77_,

A. Favareto50a,50b_{, L. Fayard}117_{, P. Federic}144a_,

O.L. Fedin123,m_{, W. Fedorko}168_{, S. Feigl}30_,

L. Feligioni85_{, C. Feng}33d_{, E.J. Feng}6_{, H. Feng}89_,

A.B. Fenyuk130_{, P. Fernandez Martinez}167_,

S. Fernandez Perez30_{, J. Ferrando}53_{, A. Ferrari}166_,

P. Ferrari107, R. Ferrari121a, D.E. Ferreira de Lima53,

A. Ferrer167, D. Ferrere49, C. Ferretti89,

A. Ferretto Parodi50a,50b, M. Fiascaris31, F. Fiedler83,

A. Filipˇciˇc75, M. Filipuzzi42, F. Filthaut106,

M. Fincke-Keeler169_{, K.D. Finelli}150_,

M.C.N. Fiolhais126a,126c_{, L. Fiorini}167_{, A. Firan}40_,

A. Fischer2_{, C. Fischer}12_{, J. Fischer}175_{, W.C. Fisher}90_,

E.A. Fitzgerald23_{, M. Flechl}48_{, I. Fleck}141_,

P. Fleischmann89_{, S. Fleischmann}175_{, G.T. Fletcher}139_,

G. Fletcher76_{, T. Flick}175_{, A. Floderus}81_,

L.R. Flores Castillo60a_{, M.J. Flowerdew}101_,

A. Formica136_{, A. Forti}84_{, D. Fournier}117_{, H. Fox}72_,

S. Fracchia12_{, P. Francavilla}80_{, M. Franchini}20a,20b_,

D. Francis30_{, L. Franconi}119_{, M. Franklin}57_,

M. Fraternali121a,121b_{, D. Freeborn}78_{, S.T. French}28_,

F. Friedrich44, D. Froidevaux30, J.A. Frost120,

C. Fukunaga156, E. Fullana Torregrosa83,

B.G. Fulsom143, J. Fuster167, C. Gabaldon55,

O. Gabizon175, A. Gabrielli20a,20b, A. Gabrielli132a,132b,

S. Gadatsch107_{, S. Gadomski}49_{, G. Gagliardi}50a,50b_,

P. Gagnon61_{, C. Galea}106_{, B. Galhardo}126a,126c_,

E.J. Gallas120_{, B.J. Gallop}131_{, P. Gallus}128_,

G. Galster36_{, K.K. Gan}111_{, J. Gao}33b,85_{, Y. Gao}46_,

Y.S. Gao143,e_{, F.M. Garay Walls}46_{, F. Garberson}176_,

C. Garc´ıa167_{, J.E. Garc´ıa Navarro}167_,

M. Garcia-Sciveres15_{, R.W. Gardner}31_{, N. Garelli}143_,

V. Garonne119_{, C. Gatti}47_{, A. Gaudiello}50a,50b_,

G. Gaudio121a_{, B. Gaur}141_{, L. Gauthier}95_,

P. Gauzzi132a,132b_{, I.L. Gavrilenko}96_{, C. Gay}168_,

G. Gaycken21, E.N. Gazis10, P. Ge33d, Z. Gecse168,

C.N.P. Gee131, D.A.A. Geerts107, Ch. Geich-Gimbel21,

M.P. Geisler58a_{, C. Gemme}50a_{, M.H. Genest}55_,

S. Gentile132a,132b_{, M. George}54_{, S. George}77_,

D. Gerbaudo163_{, A. Gershon}153_{, H. Ghazlane}135b_,

B. Giacobbe20a_{, S. Giagu}132a,132b_{, V. Giangiobbe}12_,

P. Giannetti124a,124b_{, B. Gibbard}25_{, S.M. Gibson}77_,

M. Gilchriese15_{, T.P.S. Gillam}28_{, D. Gillberg}30_,

G. Gilles34_{, D.M. Gingrich}3,d_{, N. Giokaris}9_,

M.P. Giordani164a,164c_{, F.M. Giorgi}20a_{, F.M. Giorgi}16_,

P.F. Giraud136_{, P. Giromini}47_{, D. Giugni}91a_,

C. Giuliani48_{, M. Giulini}58b_{, B.K. Gjelsten}119_,

S. Gkaitatzis154, I. Gkialas154, E.L. Gkougkousis117,

L.K. Gladilin99, C. Glasman82, J. Glatzer30,

P.C.F. Glaysher46, A. Glazov42, M. Goblirsch-Kolb101,

J.R. Goddard76, J. Godlewski39, S. Goldfarb89,

T. Golling49, D. Golubkov130, A. Gomes126a,126b,126d,

R. Gon¸calo126a_,

J. Goncalves Pinto Firmino Da Costa136_{, L. Gonella}21_,

S. Gonz´alez de la Hoz167_{, G. Gonzalez Parra}12_,

S. Gonzalez-Sevilla49_{, L. Goossens}30_{, P.A. Gorbounov}97_,

H.A. Gordon25_{, I. Gorelov}105_{, B. Gorini}30_,

E. Gorini73a,73b_{, A. Goriˇsek}75_{, E. Gornicki}39_,

A.T. Goshaw45_{, C. G¨ossling}43_{, M.I. Gostkin}65_,

D. Goujdami135c_{, A.G. Goussiou}138_{, N. Govender}145b_,

H.M.X. Grabas137_{, L. Graber}54_{, I. Grabowska-Bold}38a_,

P. Grafstr¨om20a,20b_{, K-J. Grahn}42_{, J. Gramling}49_,

E. Gramstad119, S. Grancagnolo16, V. Grassi148,

V. Gratchev123, H.M. Gray30, E. Graziani134a,

Z.D. Greenwood79,n, K. Gregersen78, I.M. Gregor42,

P. Grenier143, J. Griffiths8, A.A. Grillo137, K. Grimm72,

S. Grinstein12,o_{, Ph. Gris}34_{, J.-F. Grivaz}117_,

J.P. Grohs44_{, A. Grohsjean}42_{, E. Gross}172_,

J. Grosse-Knetter54_{, G.C. Grossi}79_{, Z.J. Grout}149_,

L. Guan33b_{, J. Guenther}128_{, F. Guescini}49_{, D. Guest}176_,

O. Gueta153_{, E. Guido}50a,50b_{, T. Guillemin}117_,

S. Guindon2_{, U. Gul}53_{, C. Gumpert}44_{, J. Guo}33e_,

S. Gupta120_{, P. Gutierrez}113_{, N.G. Gutierrez Ortiz}53_,

C. Gutschow44_{, C. Guyot}136_{, C. Gwenlan}120_,

C.B. Gwilliam74_{, A. Haas}110_{, C. Haber}15_,

H.K. Hadavand8_{, N. Haddad}135e_{, P. Haefner}21_,

S. Hageb¨ock21_{, Z. Hajduk}39_{, H. Hakobyan}177_,

M. Haleem42, J. Haley114, D. Hall120, G. Halladjian90,

G.D. Hallewell85, K. Hamacher175, P. Hamal115,

K. Hamano169, M. Hamer54, A. Hamilton145a,

S. Hamilton161, G.N. Hamity145c, P.G. Hamnett42,

L. Han33b_{, K. Hanagaki}118_{, K. Hanawa}155_{, M. Hance}15_,

P. Hanke58a_{, R. Hanna}136_{, J.B. Hansen}36_,

J.D. Hansen36_{, M.C. Hansen}21_{, P.H. Hansen}36_,

K. Hara160_{, A.S. Hard}173_{, T. Harenberg}175_{, F. Hariri}117_,

S. Harkusha92_{, R.D. Harrington}46_{, P.F. Harrison}170_,

F. Hartjes107_{, M. Hasegawa}67_{, S. Hasegawa}103_,

Y. Hasegawa140_{, A. Hasib}113_{, S. Hassani}136_{, S. Haug}17_,

R. Hauser90_{, L. Hauswald}44_{, M. Havranek}127_,

C.M. Hawkes18_{, R.J. Hawkings}30_{, A.D. Hawkins}81_,

H.S. Hayward74, S.J. Haywood131, S.J. Head18,

T. Heck83, V. Hedberg81, L. Heelan8, S. Heim122,

T. Heim175_{, B. Heinemann}15_{, L. Heinrich}110_,

J. Hejbal127_{, L. Helary}22_{, S. Hellman}146a,146b_,

D. Hellmich21_{, C. Helsens}30_{, J. Henderson}120_,

R.C.W. Henderson72_{, Y. Heng}173_{, C. Hengler}42_,

A. Henrichs176_{, A.M. Henriques Correia}30_,

S. Henrot-Versille117_{, G.H. Herbert}16_,

Y. Hern´andez Jim´enez167_{, R. Herrberg-Schubert}16_,

G. Herten48_{, R. Hertenberger}100_{, L. Hervas}30_,

G.G. Hesketh78_{, N.P. Hessey}107_{, J.W. Hetherly}40_,

R. Hickling76_{, E. Hig´on-Rodriguez}167_{, E. Hill}169_,

J.C. Hill28, K.H. Hiller42, S.J. Hillier18, I. Hinchliffe15,

E. Hines122, R.R. Hinman15, M. Hirose157,

D. Hirschbuehl175, J. Hobbs148, N. Hod107,

M.C. Hodgkinson139, P. Hodgson139, A. Hoecker30,

M.R. Hoeferkamp105_{, F. Hoenig}100_{, M. Hohlfeld}83_,

D. Hohn21_{, T.R. Holmes}15_{, M. Homann}43_,

T.M. Hong125_{, L. Hooft van Huysduynen}110_,

W.H. Hopkins116_{, Y. Horii}103_{, A.J. Horton}142_,

J-Y. Hostachy55_{, S. Hou}151_{, A. Hoummada}135a_,

J. Howard120_{, J. Howarth}42_{, M. Hrabovsky}115_,

I. Hristova16_{, J. Hrivnac}117_{, T. Hryn’ova}5_,

A. Hrynevich93_{, C. Hsu}145c_{, P.J. Hsu}151,p_{, S.-C. Hsu}138_,

D. Hu35_{, Q. Hu}33b_{, X. Hu}89_{, Y. Huang}42_{, Z. Hubacek}30_,

F. Hubaut85_{, F. Huegging}21_{, T.B. Huffman}120_,

E.W. Hughes35_{, G. Hughes}72_{, M. Huhtinen}30_,

T.A. H¨ulsing83, N. Huseynov65,b, J. Huston90,

J. Huth57, G. Iacobucci49, G. Iakovidis25,

I. Ibragimov141, L. Iconomidou-Fayard117, E. Ideal176,

Z. Idrissi135e, P. Iengo30, O. Igonkina107, T. Iizawa171,

Y. Ikegami66_{, K. Ikematsu}141_{, M. Ikeno}66_,

Y. Ilchenko31,q_{, D. Iliadis}154_{, N. Ilic}158_{, Y. Inamaru}67_,

T. Ince101_{, P. Ioannou}9_{, M. Iodice}134a_{, K. Iordanidou}35_,

V. Ippolito57_{, A. Irles Quiles}167_{, C. Isaksson}166_,

M. Ishino68_{, M. Ishitsuka}157_{, R. Ishmukhametov}111_,

C. Issever120_{, S. Istin}19a_{, J.M. Iturbe Ponce}84_,

R. Iuppa133a,133b_{, J. Ivarsson}81_{, W. Iwanski}39_,

H. Iwasaki66_{, J.M. Izen}41_{, V. Izzo}104a_{, S. Jabbar}3_,

B. Jackson122_{, M. Jackson}74_{, P. Jackson}1_,

M.R. Jaekel30_{, V. Jain}2_{, K. Jakobs}48_{, S. Jakobsen}30_,

T. Jakoubek127_{, J. Jakubek}128_{, D.O. Jamin}151_,

D.K. Jana79, E. Jansen78, R.W. Jansky62, J. Janssen21,

M. Janus170, G. Jarlskog81, N. Javadov65,b,

T. Jav˚urek48, L. Jeanty15, J. Jejelava51a,r,

G.-Y. Jeng150, D. Jennens88, P. Jenni48,s, J. Jentzsch43,

C. Jeske170_{, S. J´ez´equel}5_{, H. Ji}173_{, J. Jia}148_,

Y. Jiang33b_{, S. Jiggins}78_{, J. Jimenez Pena}167_{, S. Jin}33a_,

A. Jinaru26a_{, O. Jinnouchi}157_{, M.D. Joergensen}36_,

P. Johansson139_{, K.A. Johns}7_{, K. Jon-And}146a,146b_,

G. Jones170_{, R.W.L. Jones}72_{, T.J. Jones}74_,

J. Jongmanns58a_{, P.M. Jorge}126a,126b_{, K.D. Joshi}84_,

J. Jovicevic159a_{, X. Ju}173_{, C.A. Jung}43_{, P. Jussel}62_,

A. Juste Rozas12,o_{, M. Kaci}167_{, A. Kaczmarska}39_,

M. Kado117_{, H. Kagan}111_{, M. Kagan}143_{, S.J. Kahn}85_,

E. Kajomovitz45_{, C.W. Kalderon}120_{, S. Kama}40_,

A. Kamenshchikov130, N. Kanaya155, M. Kaneda30,

S. Kaneti28, V.A. Kantserov98, J. Kanzaki66,

B. Kaplan110_{, A. Kapliy}31_{, D. Kar}53_{, K. Karakostas}10_,

A. Karamaoun3_{, N. Karastathis}10,107_{, M.J. Kareem}54_,

M. Karnevskiy83_{, S.N. Karpov}65_{, Z.M. Karpova}65_,

K. Karthik110_{, V. Kartvelishvili}72_{, A.N. Karyukhin}130_,

L. Kashif173_{, R.D. Kass}111_{, A. Kastanas}14_,

Y. Kataoka155_{, A. Katre}49_{, J. Katzy}42_{, K. Kawagoe}70_,

T. Kawamoto155_{, G. Kawamura}54_{, S. Kazama}155_,

V.F. Kazanin109,c_{, M.Y. Kazarinov}65_{, R. Keeler}169_,

R. Kehoe40_{, J.S. Keller}42_{, J.J. Kempster}77_,

H. Keoshkerian84_{, O. Kepka}127_{, B.P. Kerˇsevan}75_,

S. Kersten175, R.A. Keyes87, F. Khalil-zada11,

H. Khandanyan146a,146b, A. Khanov114,

A.G. Kharlamov109,c, T.J. Khoo28, V. Khovanskiy97,

E. Khramov65, J. Khubua51b,t, H.Y. Kim8,

H. Kim146a,146b, S.H. Kim160, Y. Kim31, N. Kimura154,

O.M. Kind16_{, B.T. King}74_{, M. King}167_{, R.S.B. King}120_,

S.B. King168_{, J. Kirk}131_{, A.E. Kiryunin}101_,

T. Kishimoto67_{, D. Kisielewska}38a_{, F. Kiss}48_,

K. Kiuchi160_{, O. Kivernyk}136_{, E. Kladiva}144b_,

M.H. Klein35_{, M. Klein}74_{, U. Klein}74_{, K. Kleinknecht}83_,

P. Klimek146a,146b_{, A. Klimentov}25_{, R. Klingenberg}43_,

J.A. Klinger84_{, T. Klioutchnikova}30_{, P.F. Klok}106_,

E.-E. Kluge58a_{, P. Kluit}107_{, S. Kluth}101_{, E. Kneringer}62_,

E.B.F.G. Knoops85_{, A. Knue}53_{, A. Kobayashi}155_,

D. Kobayashi157_{, T. Kobayashi}155_{, M. Kobel}44_,

M. Kocian143, P. Kodys129, T. Koffas29,

E. Koffeman107, L.A. Kogan120, S. Kohlmann175,

Z. Kohout128, T. Kohriki66, T. Koi143, H. Kolanoski16,

I. Koletsou5, A.A. Komar96,∗, Y. Komori155,

T. Kondo66_{, N. Kondrashova}42_{, K. K¨oneke}48_,

A.C. K¨onig106_{, S. K¨onig}83_{, T. Kono}66,u_,

R. Konoplich110,v_{, N. Konstantinidis}78_,

R. Kopeliansky152_{, S. Koperny}38a_{, L. K¨opke}83_,

A.K. Kopp48_{, K. Korcyl}39_{, K. Kordas}154_{, A. Korn}78_,

A.A. Korol109,c_{, I. Korolkov}12_{, E.V. Korolkova}139_,

O. Kortner101_{, S. Kortner}101_{, T. Kosek}129_,

V.V. Kostyukhin21_{, V.M. Kotov}65_{, A. Kotwal}45_,

A. Kourkoumeli-Charalampidi154_{, C. Kourkoumelis}9_,

V. Kouskoura25_{, A. Koutsman}159a_{, R. Kowalewski}169_,

T.Z. Kowalski38a_{, W. Kozanecki}136_{, A.S. Kozhin}130_,

V.A. Kramarenko99, G. Kramberger75,

D. Krasnopevtsev98, M.W. Krasny80,

A. Krasznahorkay30, J.K. Kraus21, A. Kravchenko25,

S. Kreiss110, M. Kretz58c, J. Kretzschmar74,

K. Kreutzfeldt52_{, P. Krieger}158_{, K. Krizka}31_,

K. Kroeninger43_{, H. Kroha}101_{, J. Kroll}122_,

J. Kroseberg21_{, J. Krstic}13_{, U. Kruchonak}65_,

H. Kr¨uger21_{, N. Krumnack}64_{, Z.V. Krumshteyn}65_,

A. Kruse173_{, M.C. Kruse}45_{, M. Kruskal}22_{, T. Kubota}88_,

H. Kucuk78_{, S. Kuday}4c_{, S. Kuehn}48_{, A. Kugel}58c_,

F. Kuger174_{, A. Kuhl}137_{, T. Kuhl}42_{, V. Kukhtin}65_,

Y. Kulchitsky92_{, S. Kuleshov}32b_{, M. Kuna}132a,132b_,

T. Kunigo68_{, A. Kupco}127_{, H. Kurashige}67_,