[PDF] Top 20 Search for long-lived particles using delayed photons in proton-proton collisions at root s=13 TeV

... A. Lath, 185 R. Montalvo, 185 K. Nash, 185 M. Osherson, 185 H. Saka, 185 S. Salur, 185 S. Schnetzer, 185 S. Somalwar, 185 R. Stone, 185 S. Thomas, 185 H. Acharya, 186 A. G. Delannoy, 186 ... See full document

... A search for long-lived particles decaying into multijet final states has been performed using proton-proton colli- sion events collected with the CMS detector at a ... See full document

... protons. At the experiments, bunch crossings (BX) nominally occur at intervals of 25 ...ns. In 2012, however, the LHC operated with a 50 ns minimum interval between proton bunches and the most ... See full document

... J. Gray, 138 R. P. Kenny III, 138 M. Malek, 138 M. Murray, 138 D. Noonan, 138 S. Sanders, 138 J. Sekaric, 138 R. Stringer, 138 Q. Wang, 138 J. S. Wood, 138 A. F. Barfuss, 139 I. Chakaberia, 139 A. Ivanov, ... See full document

... events in which at least one dilepton candidate passes all selection ...events in which only one LL particle (X or ~χ 0 ) decays to the chosen lepton species, defining efficiency ϵ 1 , and second for ... See full document

... excluded at 95% confidence level, as are charginos with lifetimes from ...previous search for disappearing tracks performed by the CMS Collaboration [12] and are complementary to the limits set by searches ... See full document

... track in the region | η | < 2 . 5 at radial distances of 33 mm, 50 mm, 88 mm and 122 mm from the LHC beam ...2 s − 1 luminosity, when the next-to-innermost pixel layer begins to lose detection ... See full document

... ] at the LHC, consisting of an inner tracking system (ID) contained in a superconducting solenoid, which provides a 2 T magnetic field parallel to the beam direction, electromagnetic and hadronic ... See full document

... pp collisions can be misidentified as photons. In particular, beam halo muons that accompany proton beams and penetrate the detec- tor longitudinally, and the interaction of particles ... See full document

... the particles in an event and to identify them as muons, electrons (with associated bremsstrahlung photons), photons (unconverted and converted into e þ e − pairs), and either charged or ... See full document

... purity in physics object reconstruction and ...individual particles in an event using an optimized combination of information from the various elements of the CMS ...of photons is ... See full document

... experiments at the CERN ...on particles with lab frame decay lengths of c τ < 1 mm and incorporate selection requirements that re- ject longer-lived particle ...that long-lived ... See full document

... metastable particles decaying to b-quark jets using data collected at the Fermilab Tevatron at √ s = ...1.96 TeV [6, 7]. The ATLAS collaboration interpreted a search for ... See full document

... events in equally spaced log 10 (time) bins of signal lifetime hypotheses from 10 − 7 to 10 6 ...we search within a sensitivity-optimized time window of ...background in the calorimeter ... See full document

... events in the calorimeter search would ...only in the inner layers of the muon chambers (r < 560 cm, where r is the transverse distance to the IP) and cluster near the leading ...segments ... See full document

... tracks in proton-proton (pp) collision data at √ s = 8 TeV [ 12 , 13 ], and a recent analysis by the ATLAS collaboration searched for short disappearing tracks in ... See full document

... the 13 TeV MC ...neutral at production. For this search, results are obtained for two different values of f, ...to search for these signals, although only the tracker-only analysis is ... See full document

... uncertainties in the choices of renormalization scales, factorization scales, and PDF ...the long-lived top squark model in the mass-lifetime plane, assuming a 100% branching fraction for ˜t → ... See full document

... colleagues in the CERN accelerator depart- ments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS in- stitutes for their ... See full document

... an in-time pp collision. Additionally, to remove rare events in which an out-of-time pp collision occurred, usually caused by residual protons found in between proton bunches, we veto events ... See full document