Search for a light Higgs boson decaying to long-lived weakly-interacting particles in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector

arXiv:1203.1303v3 [hep-ex] 28 Jun 2012

Search for a light Higgs boson decaying to long-lived weakly-interacting particles in

proton-proton collisions at

√

s

= 7 TeV with the ATLAS detector

The ATLAS Collaboration

A search for the decay of a light Higgs (120 − 140 GeV) to a pair of weakly-interacting, long-lived particles in 1.94 fb−1 _{of proton-proton collisions at}√_{s =7 TeV recorded in 2011 by the ATLAS} detector is presented. The search strategy requires that both long-lived particles decay inside the muon spectrometer. No excess of events is observed above the expected background and limits on the Higgs boson production times branching ratio to weakly-interacting, long-lived particles are derived as a function of the particle proper decay length.

PACS numbers: 12.60.-i,14.80.Da

A Higgs boson [1–3] below 140 GeV is particularly sen-sitive to new physics. Many extensions of the Standard Model (SM) include neutral, weakly-coupled particles that can be long-lived [4, 5] and to which the Higgs may decay. These long-lived particles occur in many models, including gauge-mediated extensions of the Minimal Su-persymmetric Standard Model (MSSM) [6], MSSM with R-parity violation [7], inelastic dark matter [8] and the Hidden Valley (HV) scenario [9].

This letter presents the first ATLAS search for the

Higgs decay, h0_{→ π}

vπv, to two identical neutral particles

(πv) that have a displaced decay to fermion−anti-fermion

pairs. As a benchmark we take an HV model [9] in which the SM is weakly coupled, by a heavy communicator par-ticle, to a hidden sector that includes a pseudoscalar, the

πv. Due to the helicity suppression of pseudoscalar

de-cays to low-mass f f pairs, the πv decays predominantly

to heavy fermions, bb, cc and τ+_τ− _{in the ratio 85:5:8}

%. The weak coupling between the two sectors leads the

πv to have a long lifetime. Other, non-HV, models with

the identical signature, where the πv is replaced with

an-other weakly-interacting scalar or pseudoscalar particle, are discussed in Ref. [4, 10]. Both Tevatron experiments, CDF and D0, performed similar searches for displaced decays in their respective tracking volumes, which lim-ited the proper decay length range they could explore to a few hundred millimeters [11, 12].

In many of these beyond-the-SM scenarios, the life-time of the neutral states is not specified and can have a very large range. The current search covers a range of expected proper decay lengths extending to about 20 m by exploiting the size and layout of the ATLAS muon spectrometer. Consequently the experimental challenge is to develop signature-driven triggers to select displaced decays throughout the ATLAS detector volume [13].

This analysis requires both πv decays to occur near

the outer radius of the hadronic calorimeter (r ∼ 4 m) or in the muon spectrometer (MS). Such decays give a (η, φ) cluster of charged and neutral hadrons in the

MS. Requiring both πv’s to have this decay topology

improves background rejection. The analysis uses spe-cialized tracking and vertex reconstruction algorithms,

described below, to reconstruct vertices in the MS. The analysis strategy takes advantage of the kinematics of the gluon fusion production mechanism and subsequent

two-body decay, h0_{→ π}

vπv, which results in events with

back-to-back πv’s, by requiring two well separated

ver-tices (∆R ≡ p(∆η)2_{+ (∆φ)}2 _{> 2) [14] in the MS.}

The data used in this analysis were collected in the first half of 2011 with the LHC operating at 7 TeV. Applying beam, detector and data quality requirements resulted in

a total integrated luminosity of 1.94 fb−1_{. The integrated}

luminosity has a relative uncertainty of 3.7% [15, 16]. Signal Monte Carlo (MC) samples were generated us-ing PYTHIA [17, 18] to simulate gluon fusion

produc-tion (gg → h0_{) and decay of the Higgs (h}0_{→ π}

vπv).

Four samples were generated: mh0 = 120 and

140 GeV and for each mh0 two π_v masses of 20

and 40 GeV. The predicted Higgs production cross

sections [19] are: σ(mh0=120 GeV) = 16.6+3.3

−2.5pb and

σ(mh0=140 GeV) = 12.1+2.3

−1.8pb, and the branching

ra-tio for h0_{→ π}

vπvis assumed to be 100%. The response of

the ATLAS detector was modeled with GEANT4 [20, 21]. The effect of multiple pp collisions occurring during the same bunch crossing (pileup) was simulated by superim-posing several minimum bias events on the signal event. The MC events were weighted so that the pileup in the simulation agrees with pileup conditions found in data.

ATLAS is a multipurpose detector [22] consisting of an inner tracking detector (ID) surrounded by a super-conducting solenoid that provides a 2 T field, electromag-netic and hadronic calorimeters and a MS with a toroidal magnetic field. The ID, consisting of silicon pixel and strip detectors and a straw tube tracker, provides pre-cision tracking of charged particles for | η | ≤ 2.5. The calorimeter system covers | η | ≤ 4.9 and has 9.7 inter-action lengths at η = 0. The MS consists of a barrel and two forward spectrometers, each with 16 φ sectors instrumented with detectors for first level triggering and precision tracking detectors for muon momentum mea-surement. Each spectrometer has three stations along the muon flight path: inner, middle, and outer. In the barrel, the stations are located at radii of ∼4.5 m, 7 m and 10 m, while in the forward MS, they are located at |z| ∼ 7.5 m,

14 m and 20 m. This analysis uses muon tracking for | η | ≤ 2.4, where each station is instrumented with two multilayers of precision tracking chambers, Monitored Drift Tubes (MDTs). It also utilizes Level 1 [23] (L1) muon triggering in the barrel MS (| η | ≤ 1). The trigger chambers are located in the middle and outer stations. The L1 muon trigger requires hits in the middle station to

create a low pTmuon Region of Interest (RoI) or hits in

both the middle and outer stations for a high pTRoI. The

muon RoIs have a spacial extent of 0.2×0.2 in ∆η × ∆φ and are limited to two RoIs per sector.

A dedicated, signature-driven trigger, the muon RoI cluster trigger [13], was developed to trigger on events

with a πv decaying in the MS. It selects events with a

cluster of three or more muon RoIs in a ∆R = 0.4 cone in the MS barrel trigger chambers. This trigger

con-figuration implies that one πv must decay in the

bar-rel spectrometer, while the second πv may decay either

in the barrel or the forward spectrometer. With this

trigger, it is possible to trigger on πv decays at the

outer radius of the hadronic calorimeter and in the MS with high efficiency. The backgrounds of punch-through jets [24] and muon bremsstrahlung are suppressed by

re-quiring no calorimeter jets with ET≥ 30 GeV in a cone

of ∆R = 0.7 and no ID tracks with pT≥ 5 GeV within

a region of ∆η × ∆φ = 0.2×0.2 around the RoI cluster center. These isolation criteria result in a negligible loss in the simulated signal while significantly reducing the backgrounds.

As depicted in Fig. 1(a)[25], MC studies show the RoI cluster trigger is ∼30 − 50% efficient in the region from

4 m to 7 m. The πv’s that decay beyond a radius of

∼7 m do not leave hits in the trigger chambers located

at ∼7 m, while the πv decays that occur before r ∼4 m

are located in the calorimeter and do not produce suf-ficient activity in the MS to pass the muon RoI cluster

trigger. The mh0 = 120 GeV and m_π

v = 40 GeV sample

has a relatively lower efficiency because the πv’s have a

lower boost and arrive later at the MS. As a result the trigger signal may be associated with the incorrect bunch crossing, in which case the event is lost.

The systematic uncertainty of the muon RoI cluster trigger efficiency is evaluated on data using a sample of events containing a punch-through jet. This sample of events is similar to signal events as it contains both low energy photons and charged hadrons in a localized region of the MS. These punch-through jets are selected to be in

the barrel calorimeter (| η | ≤ 1.4), have ET≥ 20 GeV,

at least four tracks in the ID, each with pT≥ 1 GeV and

at least 20 GeV of missing transverse momentum aligned with the jet. To ensure significant activity in the MS, the jet is required to contain at least 300 MDT hits in a cone of ∆R = 0.6, centered around the jet axis [26]. The muon RoI cluster trigger algorithm was run in the vicinity of the punch-through jet for both data and MC events. The distribution of RoIs contained in the cluster for data and MC events, normalized to the number of data events, is shown in Fig. 2. The shapes of the distribution match

r [m] 0 1 2 3 4 5 6 7 8 9 10 T ri g g e r E ff ic ie n c y 0 0.1 0.2 0.3 0.4 0.5 0.6 =20 GeV v π =120 GeV, m h m =40 GeV v π =120 GeV, m h m =20 GeV v π =140 GeV, m h m =40 GeV v π =140 GeV, m h m ATLAS Simulation (a) r [m] 0 1 2 3 4 5 6 7 8 9 10 V e rt e x R e c o n s tr u c ti o n E ff ic ie n c y 0 0.1 0.2 0.3 0.4 0.5 0.6 =20 GeV v π =120 GeV, m h m =40 GeV v π =120 GeV, m h m =20 GeV v π =140 GeV, m h m =40 GeV v π =140 GeV, m h m ATLAS Simulation (b)

FIG. 1: a: Efficiency of the trigger, as a function of the radial decay position (r) of the πv. b: The vertex reconstruction efficiency for πv decays in the barrel for events that pass the muon RoI cluster trigger as a function of the radial decay distance. The error bars represent the statistical uncertainty on the efficiencies.

well between data and MC events. A horizontal line fit to

the ratio, as a function of NRoI ≥ 1, yields 1.14 ± 0.09,

and 14% is taken as the systematic uncertainty. The effects of uncertainties in the jet energy scale (JES) [27], in the initial state radiation (ISR) spectrum [28], and in the amount of pileup were found to be negligible when varying these quantities by their uncertainties.

A specialized tracking and vertex reconstruction

algo-rithm was developed to identify πv’s that decay inside

the MS. The decay of a πv results in a high

multiplic-ity of low pTparticles (1 ≤ pT≤ 5 GeV) containing ∼10

charged particles and ∼5 π0_{’s clustered in a small ∆R}

region of the spectrometer. The πv’s that decay before

the last sampling layer of the hadronic calorimeter do not produce a significant number of tracks in the MS. Thus, detectable decay vertices must be located in the region between the outer radius of the hadronic calorimeter and the middle station of the MS. Over a wide range of ac-ceptance in the barrel MS, the total amount of material

Number of RoI’s 0 1 2 3 4 5 6 7 Number of events 1 10 2 10 3 10 QCD dijet MC =7 TeV) s Data ( ATLAS RoI N 0 1 2 3 4 5 6 7 Data/MC 0 0.5 1 1.5

FIG. 2: Distribution of number of events vs. number of muon RoIs from punch-through jets contained in the muon RoI clus-ter for both data and MC events. The error bands on the QCD dijet MC histogram represent the 1-σ statistical uncertainty.

traversed is roughly 1.3 radiation lengths [22]; therefore,

as a consequence of the ∼5 π0_{’s produced in signal events,}

large electromagnetic (EM) showers accompany the ∼10

charged particles from πvdecays. The resulting MS

envi-ronment contains, on average, approximately 800 MDT hits, of which ∼75% are from the EM showers.

The design of the muon chambers [22] is exploited in order to reconstruct tracks in this busy environment. The separation of the two multilayers inside a single muon chamber provides a powerful tool for track pattern recognition. This separation provides enough of a lever arm to allow, in the barrel, a momentum measurement with acceptable resolution for tracks up to approximately 10 GeV [29]. In the forward spectrometers, the muon chambers are outside the magnetic field region; therefore it is not possible to measure the track momentum inside of a single chamber. In both cases, the tracklets used in the vertex reconstruction are formed using hits in single muon chambers.

The MS vertex algorithm begins by grouping the track-lets using a simple cone algorithm with ∆R = 0.6. In the barrel the tracklets are extrapolated through the mag-netic field, and the vertex position is reconstructed as the point in (r,z) that uses the largest number of

track-lets to reconstruct a vertex with a χ2_{probability greater}

than 5%. In the forward spectrometer, the reconstructed tracklets do not have a measurement of the momentum; therefore, the vertex is found using a least squares regres-sion, that assumes the tracklets are straight lines. Ver-tices are required to be reconstructed using at least three tracklets, point back to the Interaction Point (IP) [30] and have | η | ≤ 2.2. After requiring the MS vertex to be

separated from ID tracks with pT≥ 5 GeV and jets with

ET≥ 15 GeV by ∆R = 0.4 and ∆R = 0.7, respectively,

the algorithm has an efficiency of ∼40% in signal MC events throughout the barrel region (4 ≤ r ≤ 7.5 m) and a resolution of 20 cm in z, 32 cm in r and 50 mrad in φ.

In the forward spectrometer, the algorithm is ∼40% ef-ficient in the region 8 ≤ |z| ≤ 14 m. Fig. 1(b)[25] shows the vertex reconstruction efficiency for the barrel recon-struction algorithm in MC signal events that passed the muon RoI cluster trigger.

The MC description of hadrons and photons in the MS was validated on the same sample of events containing a punch-through jet used to evaluate the trigger perfor-mance. The fraction of these jets that produce a MS vertex was compared in data and QCD dijet MC. Ta-ble I shows the fraction of punch-through jets that pro-duce a vertex in data and MC events as a function of the number of MDT hits in a cone of ∆R = 0.6 around the jet axis. The data-to-MC ratio is fit to a flat distribu-tion that yields a ratio consistent with unity with a 15% statistical uncertainty, which is taken to be the system-atic uncertainty in the vertex reconstruction efficiency. The systematic uncertainties arising from the JES, ISR spectrum and the amount of pileup were estimated by varying these quantities by their uncertainties and calcu-lating the change in the vertex reconstruction efficiency. The total systematic uncertainty of 16% for the efficiency of reconstructing a vertex is the sum in quadrature of the uncertainties in the efficiency of the isolation criteria due to varying the JES, ISR and pileup (3%, 3% and 2% re-spectively) and the uncertainty in the comparison of data and MC (15%).

Number of QCD dijet Data

MDT hits Monte Carlo

300 ≤ NMDT<400 10.1±2.2 % 9.1±0.5 % 400 ≤ NMDT<500 9.2±2.8 % 10.5±0.7 % 500 ≤ NMDT<600 13.1±5.4 % 13.0±0.9 % NMDT ≥ 600 16.5±4.5 % 16.7±0.7 % TABLE I: Fraction of punch-through jets that have a recon-structed vertex in the muon spectrometer for varying numbers of MDT hits for data and QCD Monte Carlo.

The final event selection requires two good MS vertices separated by ∆R > 2. The background due to events with two jets, both of which punch through the calorime-ter, is a negligible contribution to the total background due to the tight isolation criteria applied to each vertex. The background is calculated using a fully data-driven method by measuring the probability for a random event

to contain an MS vertex (Pvertex) and the probability

of reconstructing a vertex given the event passed the RoI cluster trigger (Preco). Because Pvertexand Precoare

mea-sured in data, they incorporate backgrounds from cosmic showers, beam halo and detector noise. The background is calculated as:

NFake(2 MS vertex) = N(MS vertex,1 trig)*Pvertex

+ N(MS vertex,2 trig)*P_reco

N(MS vertex,1 trig) is the number of events with a sin-gle muon RoI cluster trigger object and an isolated MS vertex. N(MS vertex, 2 trig) is the number of events

with an isolated vertex and a second RoI cluster trigger object. The first term in the equation is the expected number of background events with one vertex that

ran-domly contain a second vertex. Preco is the

probabil-ity to reconstruct a vertex given there was an RoI clus-ter trigger; thus, the second clus-term in the equation is the expected number of events with two RoI clusters that

have two vertices in the MS. Pvertex was measured

us-ing zero bias data [31] to be (9.7±6.9)×10−7_{, and P}

reco

was measured using the events that pass the muon RoI

cluster trigger to be (1.11±0.01)×10−2_{. The expected}

signal would cause, at most, a relative change in Precoof

∼1%. Preco was also measured using a sample of events

recorded when there were no collisions. In this sample of

non-collision background events, Preco was measured to

be (7.0±0.6)×10−3_{. For calculating the background, the}

larger value of Preco (1.11×10−2) is taken since it gives

a conservative estimate of the background. N(MS ver-tex, 1 trig) and N(MS verver-tex, 2 trig) are 15543 and 1, respectively. Therefore, the background is calculated to be 0.03±0.02 events.

No events in the data sample pass the selection re-quiring two isolated, back-to-back vertices in the muon

spectrometer. Since no significant excess over the

background prediction is found, exclusion limits for σh0× BR(h0→ π_vπ_v) are set by rejecting the signal

hy-pothesis at the 95% confidence level using the CLs pro-cedure [32]. Figure 3 shows the 95% CL upper limit on σh0×BR(h0→ π_vπ_v)/σ_SMas a function of the π_v proper

decay length (cτ ) in multiples of the SM Higgs cross

sec-tion, σSM. As expected the Higgs and πv mass

combina-tions with the largest boosts leading to larger βγcτ have the smallest exclusion limits.

In 1.94 fb−1_{of pp collision data at a center-of-mass}

en-ergy of 7 TeV there is no evidence of an excess of events containing two isolated, back-to-back vertices in the ATLAS muon spectrometer. Using the model of a light Higgs decaying to weakly-interacting, long-lived pseu-doscalars, limits have been placed on the pseudoscalar proper decay length. Table II shows the broad range of

πv proper decay lengths that have been excluded at the

95% CL, assuming 100% branching ratio for h0_{→ π}

vπv.

These limits also apply to models in which the Higgs de-cays to a pair of weakly-interacting scalars that in turn decay to heavy quark pairs.

mh0 (GeV) m_πv (GeV) Excluded Region 120 20 0.50 < cτ < 20.65 m 120 40 1.60 < cτ < 24.65 m 140 20 0.45 < cτ < 15.8 m 140 40 1.10 < cτ < 26.75 m TABLE II: The excluded proper decay lengths (cτ ) of the πv, at 95% CL, for each of the signal samples, assuming 100% branching ratio for the channel h0

→ πvπv.

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.

proper decay length [m]

v π 0 5 10 15 20 25 30 35 SM σ / σ 9 5 % C L L im it o n 0 0.5 1 1.5 2 2.5 3 =20 GeV v π =120 GeV, m h 95% CL Limit: m =40 GeV v π =120 GeV, m h 95% CL Limit: m =20 GeV v π =140 GeV, m h 95% CL Limit: m =40 GeV v π =140 GeV, m h 95% CL Limit: m -1 Ldt = 1.94 fb

∫

FIG. 3: Observed 95% upper limits on the process h0

→ πvπv, vs. the πv proper decay length, expressed as a multiple of the SM cross section for Higgs production. Exclusion limits assume 100% branching ratio for the Higgs decaying to πv’s.

We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CON-ICYT, Chile; CAS, MOST and NSFC, China; COL-CIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Geor-gia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Rus-sia and ROSATOM, RusRus-sian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Can-tons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Lever-hulme Trust, United Kingdom; DOE and NSF, United States of America.

The crucial computing support from all WLCG part-ners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Tai-wan), RAL (UK) and BNL (USA) and in the Tier-2 fa-cilities worldwide.

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C. Bacci133a,133b_{, A.M. Bach}14_{, H. Bachacou}135_{, K. Bachas}29_{, G. Bachy}29_{, M. Backes}49_{, M. Backhaus}20_,

E. Badescu25a_{, P. Bagnaia}131a,131b_{, S. Bahinipati}2_{, Y. Bai}32a_{, D.C. Bailey}157_{, T. Bain}157_{, J.T. Baines}128_,

O.K. Baker174_{, M.D. Baker}24_{, S. Baker}76_{, E. Banas}38_{, P. Banerjee}92_{, Sw. Banerjee}171_{, D. Banfi}29_{, A. Bangert}149_,

V. Bansal168_{, H.S. Bansil}17_{, L. Barak}170_{, S.P. Baranov}93_{, A. Barashkou}64_{, A. Barbaro Galtieri}14_{, T. Barber}48_,

E.L. Barberio85_{, D. Barberis}50a,50b_{, M. Barbero}20_{, D.Y. Bardin}64_{, T. Barillari}98_{, M. Barisonzi}173_{, T. Barklow}142_,

N. Barlow27_{, B.M. Barnett}128_{, R.M. Barnett}14_{, A. Baroncelli}133a_{, G. Barone}49_{, A.J. Barr}117_{, F. Barreiro}79_,

J. Barreiro Guimar˜aes da Costa57_{, P. Barrillon}114_{, R. Bartoldus}142_{, A.E. Barton}70_{, V. Bartsch}148_{, R.L. Bates}53_,

L. Batkova143a_{, J.R. Batley}27_{, A. Battaglia}16_{, M. Battistin}29_{, F. Bauer}135_{, H.S. Bawa}142,e_{, S. Beale}97_{, B. Beare}157_,

T. Beau77_{, P.H. Beauchemin}160_{, R. Beccherle}50a_{, P. Bechtle}20_{, H.P. Beck}16_{, S. Becker}97_{, M. Beckingham}137_,

K.H. Becks173_{, A.J. Beddall}18c_{, A. Beddall}18c_{, S. Bedikian}174_{, V.A. Bednyakov}64_{, C.P. Bee}82_{, M. Begel}24_,

S. Behar Harpaz151_{, P.K. Behera}62_{, M. Beimforde}98_{, C. Belanger-Champagne}84_{, P.J. Bell}49_{, W.H. Bell}49_,

G. Bella152_{, L. Bellagamba}19a_{, F. Bellina}29_{, M. Bellomo}29_{, A. Belloni}57_{, O. Beloborodova}106,f_{, K. Belotskiy}95_,

O. Beltramello29_{, S. Ben Ami}151_{, O. Benary}152_{, D. Benchekroun}134a_{, C. Benchouk}82_{, M. Bendel}80_{, N. Benekos}164_,

Y. Benhammou152_{, E. Benhar Noccioli}49_{, J.A. Benitez Garcia}158b_{, D.P. Benjamin}44_{, M. Benoit}114_{, J.R. Bensinger}22_,

K. Benslama129_{, S. Bentvelsen}104_{, D. Berge}29_{, E. Bergeaas Kuutmann}41_{, N. Berger}4_{, F. Berghaus}168_,

E. Berglund104_{, J. Beringer}14_{, P. Bernat}76_{, R. Bernhard}48_{, C. Bernius}24_{, T. Berry}75_{, C. Bertella}82_{, A. Bertin}19a,19b_,

F. Bertinelli29_{, F. Bertolucci}121a,121b_{, M.I. Besana}88a,88b_{, N. Besson}135_{, S. Bethke}98_{, W. Bhimji}45_{, R.M. Bianchi}29_,

M. Bianco71a,71b, O. Biebel97, S.P. Bieniek76, K. Bierwagen54, J. Biesiada14, M. Biglietti133a, H. Bilokon47, M. Bindi19a,19b_{, S. Binet}114_{, A. Bingul}18c_{, C. Bini}131a,131b_{, C. Biscarat}176_{, U. Bitenc}48_{, K.M. Black}21_{, R.E. Blair}5_,

J.-B. Blanchard135_{, G. Blanchot}29_{, T. Blazek}143a_{, C. Blocker}22_{, J. Blocki}38_{, A. Blondel}49_{, W. Blum}80_,

U. Blumenschein54_{, G.J. Bobbink}104_{, V.B. Bobrovnikov}106_{, S.S. Bocchetta}78_{, A. Bocci}44_{, C.R. Boddy}117_,

M. Boehler41_{, J. Boek}173_{, N. Boelaert}35_{, S. B¨oser}76_{, J.A. Bogaerts}29_{, A. Bogdanchikov}106_{, A. Bogouch}89,∗_,

C. Bohm145a_{, V. Boisvert}75_{, T. Bold}37_{, V. Boldea}25a_{, N.M. Bolnet}135_{, M. Bona}74_{, V.G. Bondarenko}95_,

M. Bondioli162_{, M. Boonekamp}135_{, G. Boorman}75_{, C.N. Booth}138_{, S. Bordoni}77_{, C. Borer}16_{, A. Borisov}127_,

G. Borissov70_{, I. Borjanovic}12a_{, S. Borroni}86_{, K. Bos}104_{, D. Boscherini}19a_{, M. Bosman}11_{, H. Boterenbrood}104_,

D. Botterill128_{, J. Bouchami}92_{, J. Boudreau}122_{, E.V. Bouhova-Thacker}70_{, D. Boumediene}33_{, C. Bourdarios}114_,

N. Bousson82_{, A. Boveia}30_{, J. Boyd}29_{, I.R. Boyko}64_{, N.I. Bozhko}127_{, I. Bozovic-Jelisavcic}12b_{, J. Bracinik}17_,

A. Braem29_{, P. Branchini}133a_{, G.W. Brandenburg}57_{, A. Brandt}7_{, G. Brandt}117_{, O. Brandt}54_{, U. Bratzler}155_,

B. Brau83, J.E. Brau113, H.M. Braun173, B. Brelier157, J. Bremer29, R. Brenner165, S. Bressler170, D. Breton114, D. Britton53_{, F.M. Brochu}27_{, I. Brock}20_{, R. Brock}87_{, T.J. Brodbeck}70_{, E. Brodet}152_{, F. Broggi}88a_{, C. Bromberg}87_,

J. Bronner98_{, G. Brooijmans}34_{, W.K. Brooks}31b_{, G. Brown}81_{, H. Brown}7_{, P.A. Bruckman de Renstrom}38_,

D. Bruncko143b_{, R. Bruneliere}48_{, S. Brunet}60_{, A. Bruni}19a_{, G. Bruni}19a_{, M. Bruschi}19a_{, T. Buanes}13_{, Q. Buat}55_,

F. Bucci49_{, J. Buchanan}117_{, N.J. Buchanan}2_{, P. Buchholz}140_{, R.M. Buckingham}117_{, A.G. Buckley}45_{, S.I. Buda}25a_,

I.A. Budagov64_{, B. Budick}107_{, V. B¨uscher}80_{, L. Bugge}116_{, O. Bulekov}95_{, M. Bunse}42_{, T. Buran}116_{, H. Burckhart}29_,

S. Burdin72, T. Burgess13, S. Burke128, E. Busato33, P. Bussey53, C.P. Buszello165, F. Butin29, B. Butler142, J.M. Butler21_{, C.M. Buttar}53_{, J.M. Butterworth}76_{, W. Buttinger}27_{, S. Cabrera Urb´an}166_{, D. Caforio}19a,19b_,

O. Cakir3a_{, P. Calafiura}14_{, G. Calderini}77_{, P. Calfayan}97_{, R. Calkins}105_{, L.P. Caloba}23a_{, R. Caloi}131a,131b_,

L.M. Caminada14_{, S. Campana}29_{, M. Campanelli}76_{, V. Canale}101a,101b_{, F. Canelli}30,g_{, A. Canepa}158a_{, J. Cantero}79_,

L. Capasso101a,101b_{, M.D.M. Capeans Garrido}29_{, I. Caprini}25a_{, M. Caprini}25a_{, D. Capriotti}98_{, M. Capua}36a,36b_,

R. Caputo80_{, C. Caramarcu}24_{, R. Cardarelli}132a_{, T. Carli}29_{, G. Carlino}101a_{, L. Carminati}88a,88b_{, B. Caron}84_,

S. Caron103_{, G.D. Carrillo Montoya}171_{, A.A. Carter}74_{, J.R. Carter}27_{, J. Carvalho}123a,h_{, D. Casadei}107_,

M.P. Casado11_{, M. Cascella}121a,121b_{, C. Caso}50a,50b,∗_{, A.M. Castaneda Hernandez}171_{, E. Castaneda-Miranda}171_,

V. Castillo Gimenez166_{, N.F. Castro}123a_{, G. Cataldi}71a_{, F. Cataneo}29_{, A. Catinaccio}29_{, J.R. Catmore}29_{, A. Cattai}29_,

G. Cattani132a,132b_{, S. Caughron}87_{, D. Cauz}163a,163c_{, P. Cavalleri}77_{, D. Cavalli}88a_{, M. Cavalli-Sforza}11_,

V. Cavasinni121a,121b_{, F. Ceradini}133a,133b_{, A.S. Cerqueira}23b_{, A. Cerri}29_{, L. Cerrito}74_{, F. Cerutti}47_{, S.A. Cetin}18b_,

F. Cevenini101a,101b_{, A. Chafaq}134a_{, D. Chakraborty}105_{, K. Chan}2_{, B. Chapleau}84_{, J.D. Chapman}27_,

J.W. Chapman86_{, E. Chareyre}77_{, D.G. Charlton}17_{, V. Chavda}81_{, C.A. Chavez Barajas}29_{, S. Cheatham}84_,

S. Chekanov5_{, S.V. Chekulaev}158a_{, G.A. Chelkov}64_{, M.A. Chelstowska}103_{, C. Chen}63_{, H. Chen}24_{, S. Chen}32c_,

T. Chen32c_{, X. Chen}171_{, S. Cheng}32a_{, A. Cheplakov}64_{, V.F. Chepurnov}64_{, R. Cherkaoui El Moursli}134e_,

V. Chernyatin24_{, E. Cheu}6_{, S.L. Cheung}157_{, L. Chevalier}135_{, G. Chiefari}101a,101b_{, L. Chikovani}51a_{, J.T. Childers}29_,

A. Chilingarov70_{, G. Chiodini}71a_{, M.V. Chizhov}64_{, G. Choudalakis}30_{, S. Chouridou}136_{, I.A. Christidi}76_,

A. Christov48, D. Chromek-Burckhart29, M.L. Chu150, J. Chudoba124, G. Ciapetti131a,131b, K. Ciba37, A.K. Ciftci3a,

R. Ciftci3a_{, D. Cinca}33_{, V. Cindro}73_{, M.D. Ciobotaru}162_{, C. Ciocca}19a_{, A. Ciocio}14_{, M. Cirilli}86_{, M. Citterio}88a_,

M. Ciubancan25a_{, A. Clark}49_{, P.J. Clark}45_{, W. Cleland}122_{, J.C. Clemens}82_{, B. Clement}55_{, C. Clement}145a,145b_,

R.W. Clifft128_{, Y. Coadou}82_{, M. Cobal}163a,163c_{, A. Coccaro}171_{, J. Cochran}63_{, P. Coe}117_{, J.G. Cogan}142_,

J. Coggeshall164_{, E. Cogneras}176_{, J. Colas}4_{, A.P. Colijn}104_{, N.J. Collins}17_{, C. Collins-Tooth}53_{, J. Collot}55_,

G. Colon83_{, P. Conde Mui˜no}123a_{, E. Coniavitis}117_{, M.C. Conidi}11_{, M. Consonni}103_{, V. Consorti}48_,

S. Constantinescu25a_{, C. Conta}118a,118b_{, F. Conventi}101a,i_{, J. Cook}29_{, M. Cooke}14_{, B.D. Cooper}76_,

A.M. Cooper-Sarkar117_{, K. Copic}14_{, T. Cornelissen}173_{, M. Corradi}19a_{, F. Corriveau}84,j_{, A. Cortes-Gonzalez}164_,

G. Cortiana98_{, G. Costa}88a_{, M.J. Costa}166_{, D. Costanzo}138_{, T. Costin}30_{, D. Cˆot´e}29_{, R. Coura Torres}23a_,

L. Courneyea168_{, G. Cowan}75_{, C. Cowden}27_{, B.E. Cox}81_{, K. Cranmer}107_{, F. Crescioli}121a,121b_{, M. Cristinziani}20_,

G. Crosetti36a,36b_{, R. Crupi}71a,71b_{, S. Cr´ep´e-Renaudin}55_{, C.-M. Cuciuc}25a_{, C. Cuenca Almenar}174_,

T. Cuhadar Donszelmann138, M. Curatolo47, C.J. Curtis17, C. Cuthbert149, P. Cwetanski60, H. Czirr140,

P. Czodrowski43_{, Z. Czyczula}174_{, S. D’Auria}53_{, M. D’Onofrio}72_{, A. D’Orazio}131a,131b_{, P.V.M. Da Silva}23a_,

C. Da Via81_{, W. Dabrowski}37_{, T. Dai}86_{, C. Dallapiccola}83_{, M. Dam}35_{, M. Dameri}50a,50b_{, D.S. Damiani}136_,

H.O. Danielsson29_{, D. Dannheim}98_{, V. Dao}49_{, G. Darbo}50a_{, G.L. Darlea}25b_{, C. Daum}104_{, W. Davey}20_,

T. Davidek125_{, N. Davidson}85_{, R. Davidson}70_{, E. Davies}117,c_{, M. Davies}92_{, A.R. Davison}76_{, Y. Davygora}58a_,

E. Dawe141_{, I. Dawson}138_{, J.W. Dawson}5,∗_{, R.K. Daya-Ishmukhametova}22_{, K. De}7_{, R. de Asmundis}101a_,

S. De Castro19a,19b_{, P.E. De Castro Faria Salgado}24_{, S. De Cecco}77_{, J. de Graat}97_{, N. De Groot}103_{, P. de Jong}104_,

C. De La Taille114_{, H. De la Torre}79_{, B. De Lotto}163a,163c_{, L. de Mora}70_{, L. De Nooij}104_{, D. De Pedis}131a_,

A. De Salvo131a_{, U. De Sanctis}163a,163c_{, A. De Santo}148_{, J.B. De Vivie De Regie}114_{, S. Dean}76_{, W.J. Dearnaley}70_,

R. Debbe24_{, C. Debenedetti}45_{, D.V. Dedovich}64_{, J. Degenhardt}119_{, M. Dehchar}117_{, C. Del Papa}163a,163c_,

J. Del Peso79_{, T. Del Prete}121a,121b_{, T. Delemontex}55_{, M. Deliyergiyev}73_{, A. Dell’Acqua}29_{, L. Dell’Asta}21_,

M. Della Pietra101a,i, D. della Volpe101a,101b, M. Delmastro4, N. Delruelle29, P.A. Delsart55, C. Deluca147, S. Demers174_{, M. Demichev}64_{, B. Demirkoz}11,k_{, J. Deng}162_{, S.P. Denisov}127_{, D. Derendarz}38_{, J.E. Derkaoui}134d_,

F. Derue77_{, P. Dervan}72_{, K. Desch}20_{, E. Devetak}147_{, P.O. Deviveiros}104_{, A. Dewhurst}128_{, B. DeWilde}147_,

S. Dhaliwal157_{, R. Dhullipudi}24 ,l_{, A. Di Ciaccio}132a,132b_{, L. Di Ciaccio}4_{, A. Di Girolamo}29_{, B. Di Girolamo}29_,

S. Di Luise133a,133b_{, A. Di Mattia}171_{, B. Di Micco}29_{, R. Di Nardo}47_{, A. Di Simone}132a,132b_{, R. Di Sipio}19a,19b_,

M.A. Diaz31a_{, F. Diblen}18c_{, E.B. Diehl}86_{, J. Dietrich}41_{, T.A. Dietzsch}58a_{, S. Diglio}85_{, K. Dindar Yagci}39_,

J. Dingfelder20_{, C. Dionisi}131a,131b_{, P. Dita}25a_{, S. Dita}25a_{, F. Dittus}29_{, F. Djama}82_{, T. Djobava}51b_,

M.A.B. do Vale23c_{, A. Do Valle Wemans}123a_{, T.K.O. Doan}4_{, M. Dobbs}84_{, R. Dobinson}29,∗_{, D. Dobos}29_,

E. Dobson29,m_{, J. Dodd}34_{, C. Doglioni}49_{, T. Doherty}53_{, Y. Doi}65,∗_{, J. Dolejsi}125_{, I. Dolenc}73_{, Z. Dolezal}125_,

B.A. Dolgoshein95,∗_{, T. Dohmae}154_{, M. Donadelli}23d_{, M. Donega}119_{, J. Donini}33_{, J. Dopke}29_{, A. Doria}101a_,

A. Dos Anjos171_{, M. Dosil}11_{, A. Dotti}121a,121b_{, M.T. Dova}69_{, J.D. Dowell}17_{, A.D. Doxiadis}104_{, A.T. Doyle}53_,

Z. Drasal125, J. Drees173, N. Dressnandt119, H. Drevermann29, C. Driouichi35, M. Dris9, J. Dubbert98, S. Dube14, E. Duchovni170_{, G. Duckeck}97_{, A. Dudarev}29_{, F. Dudziak}63_{, M. D¨uhrssen}29_{, I.P. Duerdoth}81_{, L. Duflot}114_,

M-A. Dufour84_{, M. Dunford}29_{, H. Duran Yildiz}3a_{, R. Duxfield}138_{, M. Dwuznik}37_{, F. Dydak}29_{, M. D¨uren}52_,

W.L. Ebenstein44_{, J. Ebke}97_{, S. Eckweiler}80_{, K. Edmonds}80_{, C.A. Edwards}75_{, N.C. Edwards}53_{, W. Ehrenfeld}41_,

T. Ehrich98_{, T. Eifert}142_{, G. Eigen}13_{, K. Einsweiler}14_{, E. Eisenhandler}74_{, T. Ekelof}165_{, M. El Kacimi}134c_,

M. Ellert165_{, S. Elles}4_{, F. Ellinghaus}80_{, K. Ellis}74_{, N. Ellis}29_{, J. Elmsheuser}97_{, M. Elsing}29_{, D. Emeliyanov}128_,

R. Engelmann147_{, A. Engl}97_{, B. Epp}61_{, A. Eppig}86_{, J. Erdmann}54_{, A. Ereditato}16_{, D. Eriksson}145a_{, J. Ernst}1_,

M. Ernst24_{, J. Ernwein}135_{, D. Errede}164_{, S. Errede}164_{, E. Ertel}80_{, M. Escalier}114_{, C. Escobar}122_{, X. Espinal Curull}11_,

B. Esposito47_{, F. Etienne}82_{, A.I. Etienvre}135_{, E. Etzion}152_{, D. Evangelakou}54_{, H. Evans}60_{, L. Fabbri}19a,19b_,

C. Fabre29_{, R.M. Fakhrutdinov}127_{, S. Falciano}131a_{, Y. Fang}171_{, M. Fanti}88a,88b_{, A. Farbin}7_{, A. Farilla}133a_,

B. Fatholahzadeh157_{, A. Favareto}88a,88b_{, L. Fayard}114_{, S. Fazio}36a,36b_{, R. Febbraro}33_{, P. Federic}143a_{, O.L. Fedin}120_,

W. Fedorko87_{, M. Fehling-Kaschek}48_{, L. Feligioni}82_{, D. Fellmann}5_{, C. Feng}32d_{, E.J. Feng}30_{, A.B. Fenyuk}127_,

J. Ferencei143b_{, J. Ferland}92_{, W. Fernando}108_{, S. Ferrag}53_{, J. Ferrando}53_{, V. Ferrara}41_{, A. Ferrari}165_{, P. Ferrari}104_,

R. Ferrari118a_{, A. Ferrer}166_{, M.L. Ferrer}47_{, D. Ferrere}49_{, C. Ferretti}86_{, A. Ferretto Parodi}50a,50b_{, M. Fiascaris}30_,

F. Fiedler80_{, A. Filipˇciˇc}73_{, A. Filippas}9_{, F. Filthaut}103_{, M. Fincke-Keeler}168_{, M.C.N. Fiolhais}123a,h_{, L. Fiorini}166_,

A. Firan39_{, G. Fischer}41_{, P. Fischer}20_{, M.J. Fisher}108_{, M. Flechl}48_{, I. Fleck}140_{, J. Fleckner}80_{, P. Fleischmann}172_,

S. Fleischmann173_{, T. Flick}173_{, L.R. Flores Castillo}171_{, M.J. Flowerdew}98_{, M. Fokitis}9_{, T. Fonseca Martin}16_,

D.A. Forbush137_{, A. Formica}135_{, A. Forti}81_{, D. Fortin}158a_{, J.M. Foster}81_{, D. Fournier}114_{, A. Foussat}29_,

A.J. Fowler44_{, K. Fowler}136_{, H. Fox}70_{, P. Francavilla}11_{, S. Franchino}118a,118b_{, D. Francis}29_{, T. Frank}170_,

M. Franklin57_{, S. Franz}29_{, M. Fraternali}118a,118b_{, S. Fratina}119_{, S.T. French}27_{, F. Friedrich}43_{, R. Froeschl}29_,

D. Froidevaux29_{, J.A. Frost}27_{, C. Fukunaga}155_{, E. Fullana Torregrosa}29_{, J. Fuster}166_{, C. Gabaldon}29_{, O. Gabizon}170_,

T. Gadfort24_{, S. Gadomski}49_{, G. Gagliardi}50a,50b_{, P. Gagnon}60_{, C. Galea}97_{, E.J. Gallas}117_{, V. Gallo}16_,

B.J. Gallop128_{, P. Gallus}124_{, K.K. Gan}108_{, Y.S. Gao}142,e_{, V.A. Gapienko}127_{, A. Gaponenko}14_{, F. Garberson}174_,

M. Garcia-Sciveres14_{, C. Garc´ıa}166_{, J.E. Garc´ıa Navarro}166_{, R.W. Gardner}30_{, N. Garelli}29_{, H. Garitaonandia}104_,

V. Garonne29, J. Garvey17, C. Gatti47, G. Gaudio118a, O. Gaumer49, B. Gaur140, L. Gauthier135, I.L. Gavrilenko93, C. Gay167_{, G. Gaycken}20_{, J-C. Gayde}29_{, E.N. Gazis}9_{, P. Ge}32d_{, C.N.P. Gee}128_{, D.A.A. Geerts}104_,

Ch. Geich-Gimbel20_{, K. Gellerstedt}145a,145b_{, C. Gemme}50a_{, A. Gemmell}53_{, M.H. Genest}55_{, S. Gentile}131a,131b_,

M. George54_{, S. George}75_{, P. Gerlach}173_{, A. Gershon}152_{, C. Geweniger}58a_{, H. Ghazlane}134b_{, N. Ghodbane}33_,

B. Giacobbe19a_{, S. Giagu}131a,131b_{, V. Giakoumopoulou}8_{, V. Giangiobbe}11_{, F. Gianotti}29_{, B. Gibbard}24_,

A. Gibson157_{, S.M. Gibson}29_{, L.M. Gilbert}117_{, V. Gilewsky}90_{, D. Gillberg}28_{, A.R. Gillman}128_{, D.M. Gingrich}2,d_,

J. Ginzburg152_{, N. Giokaris}8_{, M.P. Giordani}163c_{, R. Giordano}101a,101b_{, F.M. Giorgi}15_{, P. Giovannini}98_,

P.F. Giraud135_{, D. Giugni}88a_{, M. Giunta}92_{, P. Giusti}19a_{, B.K. Gjelsten}116_{, L.K. Gladilin}96_{, C. Glasman}79_,

J. Glatzer48_{, A. Glazov}41_{, K.W. Glitza}173_{, G.L. Glonti}64_{, J.R. Goddard}74_{, J. Godfrey}141_{, J. Godlewski}29_,

M. Goebel41_{, T. G¨opfert}43_{, C. Goeringer}80_{, C. G¨ossling}42_{, T. G¨ottfert}98_{, S. Goldfarb}86_{, T. Golling}174_,

S.N. Golovnia127_{, A. Gomes}123a,b_{, L.S. Gomez Fajardo}41_{, R. Gon¸calo}75_{, J. Goncalves Pinto Firmino Da Costa}41_,

L. Gonella20, A. Gonidec29, S. Gonzalez171, S. Gonz´alez de la Hoz166, G. Gonzalez Parra11, M.L. Gonzalez Silva26,

S. Gonzalez-Sevilla49_{, J.J. Goodson}147_{, L. Goossens}29_{, P.A. Gorbounov}94_{, H.A. Gordon}24_{, I. Gorelov}102_,

G. Gorfine173_{, B. Gorini}29_{, E. Gorini}71a,71b_{, A. Goriˇsek}73_{, E. Gornicki}38_{, S.A. Gorokhov}127_{, V.N. Goryachev}127_,

B. Gosdzik41_{, M. Gosselink}104_{, M.I. Gostkin}64_{, I. Gough Eschrich}162_{, M. Gouighri}134a_{, D. Goujdami}134c_,

M.P. Goulette49_{, A.G. Goussiou}137_{, C. Goy}4_{, S. Gozpinar}22_{, I. Grabowska-Bold}37_{, P. Grafstr¨om}29_{, K-J. Grahn}41_,

F. Grancagnolo71a_{, S. Grancagnolo}15_{, V. Grassi}147_{, V. Gratchev}120_{, N. Grau}34_{, H.M. Gray}29_{, J.A. Gray}147_,

E. Graziani133a_{, O.G. Grebenyuk}120_{, T. Greenshaw}72_{, Z.D. Greenwood}24,l_{, K. Gregersen}35_{, I.M. Gregor}41_,

P. Grenier142_{, J. Griffiths}137_{, N. Grigalashvili}64_{, A.A. Grillo}136_{, S. Grinstein}11_{, Y.V. Grishkevich}96_{, J.-F. Grivaz}114_,

M. Groh98_{, E. Gross}170_{, J. Grosse-Knetter}54_{, J. Groth-Jensen}170_{, K. Grybel}140_{, V.J. Guarino}5_{, D. Guest}174_,

C. Guicheney33_{, A. Guida}71a,71b_{, S. Guindon}54_{, H. Guler}84,n_{, J. Gunther}124_{, B. Guo}157_{, J. Guo}34_{, A. Gupta}30_,

Y. Gusakov64_{, V.N. Gushchin}127_{, A. Gutierrez}92_{, P. Gutierrez}110_{, N. Guttman}152_{, O. Gutzwiller}171_{, C. Guyot}135_,

C. Gwenlan117, C.B. Gwilliam72, A. Haas142, S. Haas29, C. Haber14, H.K. Hadavand39, D.R. Hadley17, P. Haefner98,

F. Hahn29_{, S. Haider}29_{, Z. Hajduk}38_{, H. Hakobyan}175_{, D. Hall}117_{, J. Haller}54_{, K. Hamacher}173_{, P. Hamal}112_,

M. Hamer54_{, A. Hamilton}144b,o_{, S. Hamilton}160_{, H. Han}32a_{, L. Han}32b_{, K. Hanagaki}115_{, K. Hanawa}159_{, M. Hance}14_,

C. Handel80_{, P. Hanke}58a_{, J.R. Hansen}35_{, J.B. Hansen}35_{, J.D. Hansen}35_{, P.H. Hansen}35_{, P. Hansson}142_{, K. Hara}159_,

G.A. Hare136_{, T. Harenberg}173_{, S. Harkusha}89_{, D. Harper}86_{, R.D. Harrington}45_{, O.M. Harris}137_{, K. Harrison}17_,

J. Hartert48_{, F. Hartjes}104_{, T. Haruyama}65_{, A. Harvey}56_{, S. Hasegawa}100_{, Y. Hasegawa}139_{, S. Hassani}135_,

M. Hatch29_{, D. Hauff}98_{, S. Haug}16_{, M. Hauschild}29_{, R. Hauser}87_{, M. Havranek}20_{, B.M. Hawes}117_{, C.M. Hawkes}17_,

R.J. Hawkings29_{, A.D. Hawkins}78_{, D. Hawkins}162_{, T. Hayakawa}66_{, T. Hayashi}159_{, D. Hayden}75_{, H.S. Hayward}72_,

S.J. Haywood128_{, E. Hazen}21_{, M. He}32d_{, S.J. Head}17_{, V. Hedberg}78_{, L. Heelan}7_{, S. Heim}87_{, B. Heinemann}14_,

S. Heisterkamp35_{, L. Helary}4_{, C. Heller}97_{, M. Heller}29_{, S. Hellman}145a,145b_{, D. Hellmich}20_{, C. Helsens}11_,

R.C.W. Henderson70_{, M. Henke}58a_{, A. Henrichs}54_{, A.M. Henriques Correia}29_{, S. Henrot-Versille}114_,

F. Henry-Couannier82, C. Hensel54, T. Henß173, C.M. Hernandez7, Y. Hern´andez Jim´enez166, R. Herrberg15,

A.D. Hershenhorn151_{, G. Herten}48_{, R. Hertenberger}97_{, L. Hervas}29_{, N.P. Hessey}104_{, E. Hig´on-Rodriguez}166_,

D. Hill5,∗_{, J.C. Hill}27_{, N. Hill}5_{, K.H. Hiller}41_{, S. Hillert}20_{, S.J. Hillier}17_{, I. Hinchliffe}14_{, E. Hines}119_{, M. Hirose}115_,

F. Hirsch42_{, D. Hirschbuehl}173_{, J. Hobbs}147_{, N. Hod}152_{, M.C. Hodgkinson}138_{, P. Hodgson}138_{, A. Hoecker}29_,

M.R. Hoeferkamp102_{, J. Hoffman}39_{, D. Hoffmann}82_{, M. Hohlfeld}80_{, M. Holder}140_{, S.O. Holmgren}145a_{, T. Holy}126_,

J.L. Holzbauer87_{, Y. Homma}66_{, T.M. Hong}119_{, L. Hooft van Huysduynen}107_{, T. Horazdovsky}126_{, C. Horn}142_,

S. Horner48_{, J-Y. Hostachy}55_{, S. Hou}150_{, M.A. Houlden}72_{, A. Hoummada}134a_{, J. Howarth}81_{, D.F. Howell}117_,

I. Hristova15_{, J. Hrivnac}114_{, I. Hruska}124_{, T. Hryn’ova}4_{, P.J. Hsu}80_{, S.-C. Hsu}14_{, G.S. Huang}110_{, Z. Hubacek}126_,

F. Hubaut82_{, F. Huegging}20_{, A. Huettmann}41_{, T.B. Huffman}117_{, E.W. Hughes}34_{, G. Hughes}70_,

R.E. Hughes-Jones81_{, M. Huhtinen}29_{, P. Hurst}57_{, M. Hurwitz}14_{, U. Husemann}41_{, N. Huseynov}64,p_{, J. Huston}87_,

J. Idarraga114_{, P. Iengo}101a_{, O. Igonkina}104_{, Y. Ikegami}65_{, M. Ikeno}65_{, Y. Ilchenko}39_{, D. Iliadis}153_{, N. Ilic}157_,

D. Imbault77_{, M. Imori}154_{, T. Ince}20_{, J. Inigo-Golfin}29_{, P. Ioannou}8_{, M. Iodice}133a_{, V. Ippolito}131a,131b_,

A. Irles Quiles166_{, C. Isaksson}165_{, A. Ishikawa}66_{, M. Ishino}67_{, R. Ishmukhametov}39_{, C. Issever}117_{, S. Istin}18a_,

A.V. Ivashin127_{, W. Iwanski}38_{, H. Iwasaki}65_{, J.M. Izen}40_{, V. Izzo}101a_{, B. Jackson}119_{, J.N. Jackson}72_{, P. Jackson}142_,

M.R. Jaekel29_{, V. Jain}60_{, K. Jakobs}48_{, S. Jakobsen}35_{, J. Jakubek}126_{, D.K. Jana}110_{, E. Jankowski}157_{, E. Jansen}76_,

H. Jansen29_{, A. Jantsch}98_{, M. Janus}20_{, G. Jarlskog}78_{, L. Jeanty}57_{, K. Jelen}37_{, I. Jen-La Plante}30_{, P. Jenni}29_,

A. Jeremie4_{, P. Jeˇz}35_{, S. J´ez´equel}4_{, M.K. Jha}19a_{, H. Ji}171_{, W. Ji}80_{, J. Jia}147_{, Y. Jiang}32b_{, M. Jimenez Belenguer}41_,

G. Jin32b_{, S. Jin}32a_{, O. Jinnouchi}156_{, M.D. Joergensen}35_{, D. Joffe}39_{, L.G. Johansen}13_{, M. Johansen}145a,145b_,

K.E. Johansson145a_{, P. Johansson}138_{, S. Johnert}41_{, K.A. Johns}6_{, K. Jon-And}145a,145b_{, G. Jones}81_{, R.W.L. Jones}70_,

T.W. Jones76_{, T.J. Jones}72_{, O. Jonsson}29_{, C. Joram}29_{, P.M. Jorge}123a_{, J. Joseph}14_{, T. Jovin}12b_{, X. Ju}171_,

C.A. Jung42_{, R.M. Jungst}29_{, V. Juranek}124_{, P. Jussel}61_{, A. Juste Rozas}11_{, V.V. Kabachenko}127_{, S. Kabana}16_,

M. Kaci166_{, A. Kaczmarska}38_{, P. Kadlecik}35_{, M. Kado}114_{, H. Kagan}108_{, M. Kagan}57_{, S. Kaiser}98_{, E. Kajomovitz}151_,

S. Kalinin173_{, L.V. Kalinovskaya}64_{, S. Kama}39_{, N. Kanaya}154_{, M. Kaneda}29_{, S. Kaneti}27_{, T. Kanno}156_,

V.A. Kantserov95_{, J. Kanzaki}65_{, B. Kaplan}174_{, A. Kapliy}30_{, J. Kaplon}29_{, D. Kar}43_{, M. Karagounis}20_,

M. Karagoz117, M. Karnevskiy41, K. Karr5, V. Kartvelishvili70, A.N. Karyukhin127, L. Kashif171, G. Kasieczka58b,

R.D. Kass108_{, A. Kastanas}13_{, M. Kataoka}4_{, Y. Kataoka}154_{, E. Katsoufis}9_{, J. Katzy}41_{, V. Kaushik}6_{, K. Kawagoe}66_,

T. Kawamoto154_{, G. Kawamura}80_{, M.S. Kayl}104_{, V.A. Kazanin}106_{, M.Y. Kazarinov}64_{, R. Keeler}168_{, R. Kehoe}39_,

M. Keil54_{, G.D. Kekelidze}64_{, J. Kennedy}97_{, C.J. Kenney}142_{, M. Kenyon}53_{, O. Kepka}124_{, N. Kerschen}29_,

B.P. Kerˇsevan73_{, S. Kersten}173_{, K. Kessoku}154_{, J. Keung}157_{, F. Khalil-zada}10_{, H. Khandanyan}164_{, A. Khanov}111_,

D. Kharchenko64_{, A. Khodinov}95_{, A.G. Kholodenko}127_{, A. Khomich}58a_{, T.J. Khoo}27_{, G. Khoriauli}20_,

A. Khoroshilov173_{, N. Khovanskiy}64_{, V. Khovanskiy}94_{, E. Khramov}64_{, J. Khubua}51b_{, H. Kim}145a,145b_{, M.S. Kim}2_,

P.C. Kim142_{, S.H. Kim}159_{, N. Kimura}169_{, O. Kind}15_{, B.T. King}72_{, M. King}66_{, R.S.B. King}117_{, J. Kirk}128_,

L.E. Kirsch22_{, A.E. Kiryunin}98_{, T. Kishimoto}66_{, D. Kisielewska}37_{, T. Kittelmann}122_{, A.M. Kiver}127_{, E. Kladiva}143b_,

J. Klaiber-Lodewigs42_{, M. Klein}72_{, U. Klein}72_{, K. Kleinknecht}80_{, M. Klemetti}84_{, A. Klier}170_{, P. Klimek}145a,145b_,

A. Klimentov24_{, R. Klingenberg}42_{, E.B. Klinkby}35_{, T. Klioutchnikova}29_{, P.F. Klok}103_{, S. Klous}104_{, E.-E. Kluge}58a_,

T. Kluge72, P. Kluit104, S. Kluth98, N.S. Knecht157, E. Kneringer61, J. Knobloch29, E.B.F.G. Knoops82, A. Knue54, B.R. Ko44_{, T. Kobayashi}154_{, M. Kobel}43_{, M. Kocian}142_{, P. Kodys}125_{, K. K¨oneke}29_{, A.C. K¨onig}103_{, S. Koenig}80_,

L. K¨opke80_{, F. Koetsveld}103_{, P. Koevesarki}20_{, T. Koffas}28_{, E. Koffeman}104_{, L.A. Kogan}117_{, F. Kohn}54_{, Z. Kohout}126_,

T. Kohriki65_{, T. Koi}142_{, T. Kokott}20_{, G.M. Kolachev}106_{, H. Kolanoski}15_{, V. Kolesnikov}64_{, I. Koletsou}88a_{, J. Koll}87_,

D. Kollar29_{, M. Kollefrath}48_{, S.D. Kolya}81_{, A.A. Komar}93_{, Y. Komori}154_{, T. Kondo}65_{, T. Kono}41,q_{, A.I. Kononov}48_,

R. Konoplich107,r_{, N. Konstantinidis}76_{, A. Kootz}173_{, S. Koperny}37_{, K. Korcyl}38_{, K. Kordas}153_{, V. Koreshev}127_,

A. Korn117_{, A. Korol}106_{, I. Korolkov}11_{, E.V. Korolkova}138_{, V.A. Korotkov}127_{, O. Kortner}98_{, S. Kortner}98_,

V.V. Kostyukhin20_{, M.J. Kotam¨aki}29_{, S. Kotov}98_{, V.M. Kotov}64_{, A. Kotwal}44_{, C. Kourkoumelis}8_{, V. Kouskoura}153_,

A. Koutsman158a_{, R. Kowalewski}168_{, T.Z. Kowalski}37_{, W. Kozanecki}135_{, A.S. Kozhin}127_{, V. Kral}126_,

V.A. Kramarenko96_{, G. Kramberger}73_{, M.W. Krasny}77_{, A. Krasznahorkay}107_{, J. Kraus}87_{, J.K. Kraus}20_,

A. Kreisel152_{, F. Krejci}126_{, J. Kretzschmar}72_{, N. Krieger}54_{, P. Krieger}157_{, K. Kroeninger}54_{, H. Kroha}98_{, J. Kroll}119_,

J. Kroseberg20, J. Krstic12a, U. Kruchonak64, H. Kr¨uger20, T. Kruker16, N. Krumnack63, Z.V. Krumshteyn64, A. Kruth20_{, T. Kubota}85_{, S. Kuehn}48_{, A. Kugel}58c_{, T. Kuhl}41_{, D. Kuhn}61_{, V. Kukhtin}64_{, Y. Kulchitsky}89_,

S. Kuleshov31b_{, C. Kummer}97_{, M. Kuna}77_{, N. Kundu}117_{, J. Kunkle}119_{, A. Kupco}124_{, H. Kurashige}66_{, M. Kurata}159_,

Y.A. Kurochkin89_{, V. Kus}124_{, E.S. Kuwertz}146_{, M. Kuze}156_{, J. Kvita}141_{, R. Kwee}15_{, A. La Rosa}49_,

L. La Rotonda36a,36b_{, L. Labarga}79_{, J. Labbe}4_{, S. Lablak}134a_{, C. Lacasta}166_{, F. Lacava}131a,131b_{, H. Lacker}15_,

D. Lacour77_{, V.R. Lacuesta}166_{, E. Ladygin}64_{, R. Lafaye}4_{, B. Laforge}77_{, T. Lagouri}79_{, S. Lai}48_{, E. Laisne}55_,

M. Lamanna29_{, C.L. Lampen}6_{, W. Lampl}6_{, E. Lancon}135_{, U. Landgraf}48_{, M.P.J. Landon}74_{, H. Landsman}151_,

J.L. Lane81_{, C. Lange}41_{, A.J. Lankford}162_{, F. Lanni}24_{, K. Lantzsch}173_{, S. Laplace}77_{, C. Lapoire}20_{, J.F. Laporte}135_,

T. Lari88a_{, A.V. Larionov}127_{, A. Larner}117_{, C. Lasseur}29_{, M. Lassnig}29_{, P. Laurelli}47_{, W. Lavrijsen}14_{, P. Laycock}72_,

A.B. Lazarev64_{, O. Le Dortz}77_{, E. Le Guirriec}82_{, C. Le Maner}157_{, E. Le Menedeu}9_{, C. Lebel}92_{, T. LeCompte}5_,

F. Ledroit-Guillon55_{, H. Lee}104_{, J.S.H. Lee}115_{, S.C. Lee}150_{, L. Lee}174_{, M. Lefebvre}168_{, M. Legendre}135_{, A. Leger}49_,

B.C. LeGeyt119, F. Legger97, C. Leggett14, M. Lehmacher20, G. Lehmann Miotto29, X. Lei6, M.A.L. Leite23d,

R. Leitner125_{, D. Lellouch}170_{, M. Leltchouk}34_{, B. Lemmer}54_{, V. Lendermann}58a_{, K.J.C. Leney}144b_{, T. Lenz}104_,

G. Lenzen173_{, B. Lenzi}29_{, K. Leonhardt}43_{, S. Leontsinis}9_{, C. Leroy}92_{, J-R. Lessard}168_{, J. Lesser}145a_{, C.G. Lester}27_,

A. Leung Fook Cheong171_{, J. Levˆeque}4_{, D. Levin}86_{, L.J. Levinson}170_{, M.S. Levitski}127_{, A. Lewis}117_{, G.H. Lewis}107_,

A.M. Leyko20_{, M. Leyton}15_{, B. Li}82_{, H. Li}171,s_{, S. Li}32b,t_{, X. Li}86_{, Z. Liang}117,u_{, H. Liao}33_{, B. Liberti}132a_,

P. Lichard29_{, M. Lichtnecker}97_{, K. Lie}164_{, W. Liebig}13_{, R. Lifshitz}151_{, C. Limbach}20_{, A. Limosani}85_{, M. Limper}62_,

S.C. Lin150,v_{, F. Linde}104_{, J.T. Linnemann}87_{, E. Lipeles}119_{, L. Lipinsky}124_{, A. Lipniacka}13_{, T.M. Liss}164_,

D. Lissauer24_{, A. Lister}49_{, A.M. Litke}136_{, C. Liu}28_{, D. Liu}150_{, H. Liu}86_{, J.B. Liu}86_{, M. Liu}32b_{, S. Liu}2_{, Y. Liu}32b_,

M. Livan118a,118b_{, S.S.A. Livermore}117_{, A. Lleres}55_{, J. Llorente Merino}79_{, S.L. Lloyd}74_{, E. Lobodzinska}41_{, P. Loch}6_,

W.S. Lockman136_{, T. Loddenkoetter}20_{, F.K. Loebinger}81_{, A. Loginov}174_{, C.W. Loh}167_{, T. Lohse}15_{, K. Lohwasser}48_,