Browsing by Author "(ORCID 0000-0002-0283-5234 & YÖK ID 124605) Işıldak, Bora"
Now showing items 421-440 of 930
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Observation of two excited B + c states and measurement of the B + c ( 2 S ) mass in p p collisions at √ s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2019-04-02)Signals consistent with the B-c(+)(2S) and B-c*(+)(2S) states are observed in proton-proton collisions at root s = 13 TeV, in an event sample corresponding to an integrated luminosity of 143 fb(-1), collected by the CMS ... -
Observation of Z decays to four leptons with the CMS detector at the LHC
Chatrchyan, S.; Işıldak, Bora (Springer Science+Business Media, 2012-12)The first observation of the Z boson decaying to four leptons in proton-proton collisions is presented. The analyzed data set corresponds to an integrated luminosity of 5.02 fb(-1) at root s = 7 TeV collected by the CMS ... -
Particle-flow reconstruction and global event description with the CMS detector
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2017-10-06)The CMS apparatus was identified, a few years before the start of the LHC operation at CERN, to feature properties well suited to particle-flow (PF) reconstruction: a highly-segmented tracker, a fine-grained electromagnetic ... -
Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (IOP Publishing, 2015-06)The performance and strategies used in electron reconstruction and selection at CMS are presented based on data corresponding to an integrated luminosity of 19.7 fb−1, collected in proton-proton collisions at √s = 8 TeV ... -
Performance of missing transverse momentum reconstruction in proton-proton collisions at √s = 13 TeV using the CMS detector
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2019-07)The performance of missing transverse momentum ((p) over right arrow (miss)(T)) reconstruction algorithms for the CMS experiment is presented, using proton-proton collisions at a center-of-mass energy of 13 TeV, collected ... -
Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at s = 8 TeV
Khachatryan, V.; Işıldak, Bora (IOP Publishing, 2015-08)A description is provided of the performance of the CMS detector for photon reconstruction and identification in proton-proton collisions at a centre-of-mass energy of 8 TeV at the CERN LHC. Details are given on the ... -
Performance of reconstruction and identification of τ leptons decaying to hadrons and vτ in pp collisions at √s=13 TeV
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2018-10)The algorithm developed by the CMS Collaboration to reconstruct and identify tau leptons produced in proton-proton collisions at root s = 7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly ... -
Performance of the CMS Level-1 trigger in proton-proton collisions at √s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (2020-10)At the start of Run 2 in 2015, the LHC delivered proton-proton collisions at a center-ofmass energy of 13 TeV. During Run 2 (years 2015-2018) the LHC eventually reached a luminosity of 2.1 x 10(34) cm(-2) s(-1), almost ... -
Performance of the CMS missing transverse momentum reconstruction in pp data at root s=8 TeV
Khachatryan, V.; Işıldak, Bora (IOP Publishing, 2015-02)The performance of missing transverse energy reconstruction algorithms is presented using √s=8 TeV proton-proton (pp) data collected with the CMS detector. Events with anomalous missing transverse energy are studied, and ... -
The performance of the CMS muon detector in proton-proton collisions at √ s = 7 TeV at the LHC
Chatrchyan, S.; Işıldak, Bora (IOP Publishing, 2013-11)The performance of all subsystems of the CMS muon detector has been studied by using a sample of proton-proton collision data at √s = 7 TeV collected at the LHC in 2010 that corresponds to an integrated luminosity of ... -
Performance of the CMS muon trigger system in proton-proton collisions at √(s) = 13
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2021-07)The muon trigger system of the CMS experiment uses a combination of hardware and software to identify events containing a muon. During Run 2 (covering 2015-2018) the LHC achieved instantaneous luminosities as high as 2 × ... -
Performance of the local reconstruction algorithms for the CMS hadron calorimeter with Run 2 data
Tumasyan, A.; Işıldak, Bora (IOP Publishing, 2023-11)A description is presented of the algorithms used to reconstruct energy deposited in the CMS hadron calorimeter during Run 2 (2015-2018) of the LHC. During Run 2, the characteristic bunch-crossing spacing for proton-proton ... -
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at √s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2020-02-28)The CMS detector at the LHC has recorded events from proton-proton collisions, with muon momenta reaching up to 1.8 TeV in the collected dimuon samples. These high-momentum muons allow direct access to new regimes in physics ... -
Phenomenological MSSM interpretation of CMS searches in pp collisions at root s=7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2016-10)Searches for new physics by the CMS collaboration are interpreted in the framework of the phenomenological minimal supersymmetric standard model (pMSSM). The data samples used in this study were collected at s√=7s=7 and ... -
Pileup mitigation at CMS in 13 TeV data
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2020-09)With increasing instantaneous luminosity at the LHC come additional reconstruction challenges. At high luminosity, many collisions occur simultaneously within one proton-proton bunch crossing. The isolation of an interesting ... -
Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
Khachatryan, V.; Işıldak, Bora (Springer Nature, 2015-05)Properties of the Higgs boson with mass near 125GeV are measured in proton-proton collisions with the CMS experiment at the LHC. Comprehensive sets of production and decay measurements are combined. The decay channels ... -
Precision luminosity measurement in proton–proton collisions at √s = 13 TeV in 2015 and 2016 at CMS
Sirunyan, A. M.; Işıldak, Bora (Springer, 2021-09-09)The measurement of the luminosity recorded by the CMS detector installed at LHC interaction point 5, using proton–proton collisions at s=13TeV in 2015 and 2016, is reported. The absolute luminosity scale is measured for ... -
Precision measurement of the structure of the CMS inner tracking system using nuclear interactions
Sirunyan, A. M.; Işıldak, Bora (IOP Publishing, 2018-10-29)The structure of the CMS inner tracking system has been studied using nuclear interactions of hadrons striking its material. Data from proton-proton collisions at a center-of-mass energy of 13 TeV recorded in 2015 at the ... -
Precision measurement of the W boson decay branching fractions in proton-proton collisions at √s = 13 TeV
Tumasyan, A.; Işıldak, Bora (American Physical Society, 2022-04-26)The leptonic and inclusive hadronic decay branching fractions of the W boson are measured using proton-proton collision data collected at s=13 TeV by the CMS experiment at the CERN LHC, corresponding to an integrated ... -
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √s NN = 5.02 TeV
Tumasyan, A.; Işıldak, Bora (American Physical Society, 2022-07-05)Multiparticle azimuthal correlations of prompt D0 mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of sNN=5.02 TeV. For the first time, a four-particle cumulant method is used to extract ...
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