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Journal articleScandale W, Cerutti F, Esposito LS, et al., 2023,
Beam merging assisted by a bent crystal
, EUROPEAN PHYSICAL JOURNAL PLUS, Vol: 138, ISSN: 2190-5444 -
Journal articleCMS Collaboration, 2023,
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery.
, Nature, Vol: 623, Pages: E4-E4, ISSN: 0028-0836 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Performance of the local reconstruction algorithms for the CMS hadron calorimeter with Run 2 data
, Journal of Instrumentation, Vol: 18, ISSN: 1748-0221A 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 collisions was 25 ns, which resulted in overlapping signals from adjacent crossings. The energy corresponding to a particular bunch crossing of interest is estimated using the known pulse shapes of energy depositions in the calorimeter, which are measured as functions of both energy and time. A variety of algorithms were developed to mitigate the effects of adjacent bunch crossings on local energy reconstruction in the hadron calorimeter in Run 2, and their performance is compared.
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Journal articleAdam W, Bergauer T, Damanakis K, et al., 2023,
Evaluation of planar silicon pixel sensors with the RD53A readout chip for the Phase-2 Upgrade of the CMS Inner Tracker
, JOURNAL OF INSTRUMENTATION, Vol: 18, ISSN: 1748-0221 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Observation of the B<SUP>+</SUP>→ Jψη<SUP>′</SUP>K<SUP>+</SUP> decay (vol 2023, 174, 2023)
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Observation of New Baryons in the Ξ<i><sub>b</sub></i><SUP>-</SUP> π<i><SUP>+</SUP></i>π<i><SUP>-</SUP></i> and Ξ<i><sub>b</sub></i><SUP>0</SUP>π<SUP>+</SUP>π<SUP>-</SUP> Systems
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Precision Measurement of<i> CP</i> Violation in the Penguin-Mediated Decay B0s<i> →φφ</i>
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Evidence for the decays B<SUP>0</SUP> → (D)over-bar<SUP>(*)0</SUP>φ and updated measurements of the branching fractions of the B<sub>s</sub><SUP>0</SUP> → (D)over-bar<SUP>(*)0</SUP>φ decays
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Measurements of the azimuthal anisotropy of prompt and nonprompt charmonia in PbPb collisions at √sNN = 5.02 TeV
, The Journal of High Energy Physics, Vol: 2023, ISSN: 1029-8479The second-order (v2) and third-order (v3) Fourier coefficients describing the azimuthal anisotropy of prompt and nonprompt (from b-hadron decays) J/ψ, as well asprompt ψ(2S) mesons are measured in lead-lead collisions at a center-of-mass energy per nucleon pair of √sNN = 5.02 TeV. The analysis uses a data set corresponding to an integrated luminosity of 1.61 nb−1 recorded with the CMS detector. The J/ψ and ψ(2S) mesons are reconstructed using their dimuon decay channel. The v2 and v3 coefficients are extracted using the scalar product method and studied as functions of meson transverse momentum and collision centrality. The measured v2 values for prompt J/ψ mesons are found to be larger than those for nonprompt J/ψ mesons. The prompt J/ψ v2 values at high pT arefound to be underpredicted by a model incorporating only parton energy loss effects in a quark-gluon plasma medium. Prompt and nonprompt J/ψ meson v3 and prompt ψ(2S) v2and v3 values are also reported for the first time, providing new information about heavy quark interactions in the hot and dense medium created in heavy ion collisions.
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Journal articleAaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2023,
Observation of the decays <i>B</i><sub>(<i>s</i>)</sub><SUP>0</SUP> → <i>D</i><sub>s1</sub>(2536)<SUP>∓</SUP><i>K</i><SUP>±</SUP>
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleAbe K, Akhlaq N, Akutsu R, et al., 2023,
Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 x 1021 protons on target
, PHYSICAL REVIEW D, Vol: 108, ISSN: 2470-0010 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Observation of τ Lepton pair production in ultraperipheral Pb-Pb collisions at √<i>s<sub>NN</sub></i>=5.02 TeV
, Physical Review Letters, Vol: 131, ISSN: 0031-9007We present an observation of photon-photon production of 𝜏 lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404 μb−1 collected by the CMS experiment at a center-of-mass energy per nucleon pair of √𝑠𝑁𝑁=5.02 TeV. The 𝛾𝛾→𝜏+𝜏− process is observed for 𝜏+𝜏− events with a muon and three charged hadrons in the final state. The measured fiducial cross section is 𝜎(𝛾𝛾→𝜏+𝜏−)=4.8±0.6(stat)±0.5(syst) μb, where the second (third) term corresponds to the statistical (systematic) uncertainty in 𝜎(𝛾𝛾→𝜏+𝜏−) in agreement with leading-order QED predictions. Using 𝜎(𝛾𝛾→𝜏+𝜏−), we estimate a model-dependent value of the anomalous magnetic moment of the 𝜏 lepton of 𝑎𝜏=0.001+0.055−0.089.
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Journal articleAbe K, Hayato Y, Hiraide K, et al., 2023,
Search for Cosmic-Ray Boosted Sub-GeV Dark Matter Using Recoil Protons at Super-Kamiokande (vol 130, 031802, 2023)
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2023,
Search for the lepton-flavor violating decay of the Higgs boson and additional Higgs bosons in the eμ final state in proton-proton collisions at √s = 13 TeV
, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 108, ISSN: 1550-2368A search for the lepton-flavor violating decay of the Higgs boson and potential additional Higgs bosons with a mass in the range 110–160 GeV to an 𝑒±𝜇∓ pair is presented. The search is performed with a proton-proton collision dataset at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb−1. No excess is observed for the Higgs boson. The observed (expected) upper limit on the 𝑒±𝜇∓ branching fraction for it is determined to be 4.4(4.7) ×10−5 at 95% confidence level, the most stringent limit set thus far from direct searches. The largest excess of events over the expected background in the full mass range of the search is observed at an 𝑒±𝜇∓ invariant mass of approximately 146 GeV with a local (global) significance of 3.8 (2.8) standard deviations.
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Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Measurement of the Λ<sub>b</sub><SUP>0</SUP> → Λ(1520)μ<SUP>+</SUP>μ<SUP>-</SUP> Differential Branching Fraction
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleAalbers J, Akerib DS, Al Musalhi AK, et al., 2023,
Search for new physics in low-energy electron recoils from the first LZ exposure
, PHYSICAL REVIEW D, Vol: 108, ISSN: 2470-0010 -
Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2023,
Search for new physics in multijet events with at least one photon and large missing transverse momentum in proton-proton collisions at 13 TeV
, The Journal of High Energy Physics, Vol: 2023, ISSN: 1029-8479This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
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Journal articleHayrapetyan A, Tumasyan A, Adam W, et al., 2023,
Search for a high-mass dimuon resonance produced in association with b quark jets at √s=13 TeV
, The Journal of High Energy Physics, Vol: 2023, ISSN: 1029-8479A search for high-mass dimuon resonance production in association with one or more b quark jets is presented. The study uses proton-proton collision data collectedwith the CMS detector at the LHC corresponding to an integrated luminosity of 138 fb−1 at a center-of-mass energy of 13 TeV. Model-independent limits are derived on the number of signal events with exactly one or more than one b quark jet. Results are also interpreted in a lepton-flavor-universal model with Z′ boson couplings to a bb quark pair (gb), an sb quark pair (gbδbs), and any same-flavor charged lepton (gℓ) or neutrino pair (gν ), with |gν | = |gℓ|. For a Z′ boson with a mass mZ′ = 350 GeV (2 TeV) and |δbs| < 0.25, the majority of the parameter space with 0.0057 < |gℓ| < 0.35 (0.25 < |gℓ| < 0.43) and 0.0079 < |gb| < 0.46 (0.34 < |gb| < 0.57) is excluded at 95% confidence level. Finally,constraints are set on a Z′ model with parameters consistent with low-energy b → sℓℓ measurements. In this scenario, most of the allowed parameter space is excluded for a Z′boson with 350 < mZ′ < 500 GeV, while the constraints are less stringent for higher mZ′ hypotheses. This is the first dedicated search at the LHC for a high-mass dimuon resonance produced in association with multiple b quark jets, and the constraints obtained on models with this signature are the most stringent to date.
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Journal articleAaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2023,
Observation and branching fraction measurement of the decay Ξb- → Λ0 bπ -
, PHYSICAL REVIEW D, Vol: 108, ISSN: 2470-0010 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at √s=13TeV
, European Physical Journal C, Vol: 83, ISSN: 1434-6044A search for decays to invisible particles of Higgsbosons produced in association with a top-antitop quark pairor a vector boson, which both decay to a fully hadronicfinal state, has been performed using proton-proton colli sion data collected at √s = 13 TeV by the CMS experimentat the LHC, corresponding to an integrated luminosity of138 fb−1. The 95% confidence level upper limit set on thebranching fraction of the 125 GeV Higgs boson to invisi ble particles, B(H → inv), is 0.54 (0.39 expected), assumingstandard model production cross sections. The results of thisanalysis are combined with previous B(H → inv) searchescarried out at √s = 7, 8, and 13 TeV in complementary pro duction modes. The combined upper limit at 95% confidencelevel on B(H → inv) is 0.15 (0.08 expected).A search for decays to invisible particles of Higgsbosons produced in association with a top-antitop quark pairor a vector boson, which both decay to a fully hadronicfinal state, has been performed using proton-proton colli sion data collected at √s = 13 TeV by the CMS experimentat the LHC, corresponding to an integrated luminosity of138 fb−1. The 95% confidence level upper limit set on thebranching fraction of the 125 GeV Higgs boson to invisi ble particles, B(H → inv), is 0.54 (0.39 expected), assumingstandard model production cross sections. The results of thisanalysis are combined with previous B(H → inv) searchescarried out at √s = 7, 8, and 13 TeV in complementary pro duction modes. The combined upper limit at 95% confidencelevel on B(H → inv) is 0.15 (0.08 expected).A search for decays to invisible particles of Higgsbosons produced in association with a top-antitop quark pairor a vector boson, which both decay to a fully hadronicfinal state, has been performed using proton-proton colli sion data collected at √s = 13 TeV by the CMS experimentat the LHC, corresponding to an integrated luminosity of138 fb−1. The 95%
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Journal articleFujii Y, 2023,
A search for a muon to electron conversion in COMET
, JOURNAL OF INSTRUMENTATION, Vol: 18, ISSN: 1748-0221 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Measurement of the top quark mass using a profile likelihoodapproach with the lepton + jets final states in proton–protoncollisions at √s = 13 TeV
, European Physical Journal C, Vol: 83, ISSN: 1434-6044The mass of the top quark is measured in36.3 fb−1 of LHC proton–proton collision data collected withthe CMS detector at √s = 13 TeV. The measurement uses asample of top quark pair candidate events containing one iso lated electron or muon and at least four jets in the final state.For each event, the mass is reconstructed from a kinematic fitof the decay products to a top quark pair hypothesis. A pro file likelihood method is applied using up to four observablesper event to extract the top quark mass. The top quark massis measured to be 171.77 ± 0.37 GeV. This approach signif icantly improves the precision over previous measure
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Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Measurement of <i>CP</i> asymmetries and branching fraction ratios of <i>B<SUP>-</SUP></i> decays to two charm mesons
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Observation of New Ω 0 cStates Decaying to the Ξc plus K- Final State
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleKosugi M, Tatara R, Fujii Y, et al., 2023,
Surfactant-Free Formate/O<sub>2</sub> Biofuel Cell with Electropolymerized Phenothiazine Derivative-Modified Enzymatic Bioanode
, ACS APPLIED BIO MATERIALS, Vol: 6, Pages: 4304-4313, ISSN: 2576-6422 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Evidence of a<i> J=ψK0S</i> Structure in B0 →<i> J=ψφK0S</i> Decays
, PHYSICAL REVIEW LETTERS, Vol: 131, ISSN: 0031-9007 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleAccettura C, Adams D, Agarwal R, et al., 2023,
Towards a muon collider
, EUROPEAN PHYSICAL JOURNAL C, Vol: 83, ISSN: 1434-6044 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for supersymmetry in final states with a single electron or muon using angular correlations and heavy-object identification in proton-proton collisions at √ s = 13 TeV
, The Journal of High Energy Physics, Vol: 2023, ISSN: 1029-8479A search for supersymmetry is presented in events with a single charged lepton, electron or muon, and multiple hadronic jets. The data correspond to an integrated luminosity of 138 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV, recorded by the CMS experiment at the CERN LHC. The search targets gluino pair production, where the gluinos decay into final states with the lightest supersymmetric particle (LSP) and either a top quark-antiquark (t¯t) pair, or a light-flavor quark-antiquark (q¯q) pair and a virtual or on-shell W boson. The main backgrounds, t¯t pair and W+jets production, are suppressed by requirements on the azimuthal angle between the momenta of the lepton and of its reconstructed parent W boson candidate, and by top quark and W boson identification based on a machine-learning technique. The number of observed events is consistent with the expectations from standard model processes. Limits are evaluated on supersymmetric particle masses in the context of two simplified models of gluino pair production. Exclusions for gluino masses reach up to 2120 (2050) GeV at 95% confidence level for a model with gluino decay to a t¯t pair (a q¯q pair and a W boson) and the LSP. For the same models, limits on the mass of the LSP reach up to 1250 (1070) GeV.
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
A search for new physics in central exclusive production using the missing mass technique with the CMS detector and the CMS-TOTEM precision proton spectrometer
, European Physical Journal C: Particles and Fields, Vol: 83, ISSN: 1124-1861A generic search is presented for the associ-ated production of a Z boson or a photon with an addi-tional unspecified massive particle X, pp → pp + Z/γ + X,in proton-tagged events from proton–proton collisions at√s = 13 TeV, recorded in 2017 with the CMS detectorand the CMS-TOTEM precision proton spectrometer. Themissing mass spectrum is analysed in the 600–1600 GeVrange and a fit is performed to search for possible devia-tions from the background expectation. No significant excess in data with respect to the background predictions has been observed. Model-independent upper limits on the visible production cross section of pp → pp + Z/γ + X are set.
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