Browsing by Author "Sirunyan, A. M."
Now showing items 141-160 of 344
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A multi-dimensional search for new heavy resonances decaying to boosted W W , W Z , or Z Z boson pairs in the dijet final state at 13 TeV
Sirunyan, A. M.; Işıldak, Bora (Springer Nature, 2020-03-12)A search in an all-jet final state for new massive resonances decaying to WW, WZ, or ZZ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity ... -
Multiparticle correlation studies in pPb collisions at √sNN = 8.16 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2020-01-23)The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in pPb collisions, at root s(NN) = 8.16 TeV, are studied over a wide range of event multiplicities. Multiparticle correlations ... -
Multiparticle correlations and higher order harmonics in pPb collisions at √sNN = 8.16 TeV
Wang, Q.; Sirunyan, A. M.; Işıldak, Bora (Elsevier, 2019-02)The elliptic and higher-order azimuthal anisotropy Fourier harmonics (v(n)) are obtained for pPb collisions at root s(NN) = 8.16 TeV over a wide range of event multiplicities based on multiparticle correlations. The data ... -
MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV
Sirunyan, A. M.; Işıldak, Bora (Springer, 2021-07-19)Results of the Model Unspecific Search in CMS (MUSiC), using proton–proton collision data recorded at the LHC at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 35.9fb-1, are presented. The ... -
Observation of t ¯ t H production
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2018-06-04)The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of root s = 7, 8, and 13 TeV, ... -
Observation of a new excited beauty strange baryon decaying to Ξb- π+π-
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2021-06-25)The Ξb-π+π- invariant mass spectrum is investigated with an event sample of proton-proton collisions at s=13 TeV, collected by the CMS experiment at the LHC in 2016-2018 and corresponding to an integrated luminosity of 140 ... -
Observation of electroweak production of Wγwith two jets in proton-proton collisions at √s=13 TeV
Sirunyan, A. M.; Işıldak, Bora (Elsevier, 2020-12-10)A first observation is presented for the electroweak production of a W boson, a photon, and two jets in proton-proton collisions. The W boson decays are selected by requiring one identified electron or muon and an imbalance ... -
Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2021-09-17)The first measurement of the dependence of γγ→μ+μ- production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions ... -
Observation of higgs boson decay to bottom quarks
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2018-09-17)The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons arc produced in association with a W or Z ... -
Observation of nuclear modifications in W±boson production in pPb collisions at √sNN=8.16 TeV
Sirunyan, A. M.; Işıldak, Bora (Elsevier, 2020-01-10)The production of W-+/- bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of root s(NN) = 8.16 TeV. Measurements are performed in the W-+/- -> mu(+/-)nu(mu) channel using a data ... -
Observation of prompt J/ ψ meson elliptic flow in high-multiplicity pPb collisions at √sNN = 8.16 TeV
Sirunyan, A. M.; Işıldak, Bora (Elsevier, 2019-04-10)A measurement of the elliptic flow (v(2)) of prompt J/psi mesons in high-multiplicity pPbcollisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy root s(NN)= 8.16 TeV. ... -
Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at √s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2019-04-05)The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either ... -
Observation of the Bs0 →x (3872)φ Decay
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2020-10-07)Using a data sample of proton-proton collisions at root s = 13 TeV, corresponding to an integrated luminosity of 140 fb(-1) collected by the CMS experiment in 2016-2018, the B-s(0) -> X(3872)phi decay is observed. Decays ... -
Observation of the production of three massive gauge bosons at √s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2020-10-15)The first observation is reported of the combined production of three massive gauge bosons (VVV with V = W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis is based on a data sample recorded ... -
Observation of the Z → ψ ℓ + ℓ − decay in pp collisions at √s = 13 TeV
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2018-10-04)This Letter presents the observation of the rare Z boson decay Z→ψ + -. Here, ψ represents contributions from direct J/ψ and ψ(2S)→J/ψX, + - is a pair of electrons or muons, and the J/ψ meson is detected via its decay to ... -
Observation of the Λb 0→J/ψΛϕ decay in proton-proton collisions at √s=13 TeV
Sirunyan, A. M.; Işıldak, Bora (Elsevier, 2020-03-10)The observation of the Lambda(0)(b) -> J/psi Lambda phi decay is reported using proton-proton collision data collected at root s = 13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity ... -
Observation of the χb1 (3P) and χb2 (3P) and measurement of their masses
Sirunyan, A. M.; Işıldak, Bora (American Physical Society, 2018-08-29)The χb1(3P) and χb2(3P) states are observed through their (3S)γ decays, using an event sample of proton-proton collisions collected by the CMS experiment at the CERN LHC. The data were collected at a center-of-mass energy ... -
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 ... -
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 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 ...
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