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Journal articleHarada M, Abe K, Bronner C, et al., 2023,
Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water
, ASTROPHYSICAL JOURNAL LETTERS, Vol: 951, ISSN: 2041-8205- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for top squark pair production in a final state with at least one hadronically decaying tau lepton in proton-proton collisions at s = 13 TeV
, Journal of High Energy Physics, Vol: 2023A search for pair production of the supersymmetric partner of the top quark, the top squark, in proton-proton collisions at s = 13 TeV is presented in final states containing at least one hadronically decaying tau lepton and large missing transverse momentum. This final state is highly sensitive to scenarios of supersymmetry in which the decay of the top squark to tau leptons is enhanced. The search uses a data sample corresponding to an integrated luminosity of 138 fb−1, which was recorded with the CMS detector during 2016–2018. No significant excess is observed with respect to the standard model predictions. Exclusion limits at 95% confidence level on the masses of the top squark and the lightest neutralino are presented under the assumptions of simplified models. The results probe top squark masses up to 1150 GeV for a nearly massless neutralino. This search covers a relatively less explored parameter space in the context of supersymmetry, and the exclusion limit is the most stringent to date for the model considered here.
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for Higgs boson pairs decaying to WW<sup>*</sup>WW<sup>*</sup>, WW<sup>*</sup>ττ, and ττττ in proton-proton collisions at s = 13 TeV
, Journal of High Energy Physics, Vol: 2023The results of a search for Higgs boson pair (HH) production in the WW*WW*, WW*ττ, and ττττ decay modes are presented. The search uses 138 fb−1 of proton-proton collision data recorded by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV from 2016 to 2018. Analyzed events contain two, three, or four reconstructed leptons, including electrons, muons, and hadronically decaying tau leptons. No evidence for a signal is found in the data. Upper limits are set on the cross section for nonresonant HH production, as well as resonant production in which a new heavy particle decays to a pair of Higgs bosons. For nonresonant production, the observed (expected) upper limit on the cross section at 95% confidence level (CL) is 21.3 (19.4) times the standard model (SM) prediction. The observed (expected) ratio of the trilinear Higgs boson self-coupling to its value in the SM is constrained to be within the interval −6.9 to 11.1 (−6.9 to 11.7) at 95% CL, and limits are set on a variety of new-physics models using an effective field theory approach. The observed (expected) limits on the cross section for resonant HH production range from 0.18 to 0.90 (0.08 to 1.06) pb at 95% CL for new heavy-particle masses in the range 250–1000 GeV.
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Measurements of Higgs boson production in the decay channel with a pair of τ leptons in proton–proton collisions at √s=13 TeV
, European Physical Journal C, Vol: 83, ISSN: 1434-6044Measurements of Higgs boson production, where the Higgs boson decays into a pair of τ leptons, are presented, using a sample of proton-proton collisions collected with the CMS experiment at a center-of-mass energy of [InlineEquation not available: see fulltext.], corresponding to an integrated luminosity of 138 fb-1 . Three analyses are presented. Two are targeting Higgs boson production via gluon fusion and vector boson fusion: a neural network based analysis and an analysis based on an event categorization optimized on the ratio of signal over background events. These are complemented by an analysis targeting vector boson associated Higgs boson production. Results are presented in the form of signal strengths relative to the standard model predictions and products of cross sections and branching fraction to τ leptons, in up to 16 different kinematic regions. For the simultaneous measurements of the neural network based analysis and the analysis targeting vector boson associated Higgs boson production signal strengths are found to be 0.82 ± 0.11 for inclusive Higgs boson production, 0.67 ± 0.19 (0.81 ± 0.17) for the production mainly via gluon fusion (vector boson fusion), and 1.79 ± 0.45 for vector boson associated Higgs boson production.
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Journal articleAaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2023,
Test of lepton flavor universality using B0 →D∗-τ+ντ decays with hadronic τ channels
, Physical Review D, Vol: 108, ISSN: 2470-0010The branching fraction B(B0→D∗-τ+ντ) is measured relative to that of the normalization mode B0→D∗-π+π-π+ using hadronic τ+→π+π-π+(π0)ν¯τ decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2 fb-1. The measured ratio is B(B0→D∗-τ+ντ)/B(B0→D∗-π+π-π+)=1.70±0.10-0.10+0.11, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the B0→D∗-π+π-π+ and B0→D∗-μ+νμ modes, the lepton universality test R(D∗-)B(B0→D∗-τ+ντ)/B(B0→D∗-μ+νμ) is calculated, R(D∗-)=0.247±0.015±0.015±0.012, where the third uncertainty is due to the uncertainties on the external branching fractions. This result is consistent with the Standard Model prediction and with previous measurements.
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Journal articleAbud AA, Abi B, Acciarri R, et al., 2023,
Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
, PHYSICAL REVIEW D, Vol: 107, ISSN: 2470-0010- Author Web Link
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- Citations: 1
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Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Open charm production and asymmetry in <i>p</i>Ne collisions at √<i>s</i><sub>NN</sub>=68.5 GeV
, EUROPEAN PHYSICAL JOURNAL C, Vol: 83, ISSN: 1434-6044 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
Measurement of antiproton production from antihyperon decays in <i>p</i>He collisions at √<i>s</i><sub>NN</sub>=110 GeV
, EUROPEAN PHYSICAL JOURNAL C, Vol: 83, ISSN: 1434-6044 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for nonresonant Higgs boson pair production in the four leptons plus twob jets final state in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for CP violation using t (t)over-bar events in the lepton plus jets channel in pp collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for top squarks in the four-body decay mode with single lepton final states in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Collaboration TCMS, Adam W, et al., 2023,
Observation of electroweak W<SUP>+</SUP>W<SUP>-</SUP> pair production in association with two jets in proton-proton collisions at √s=13 TeV
, PHYSICS LETTERS B, Vol: 841, ISSN: 0370-2693 -
Journal articleAaij R, Abdelmotteleb ASW, Beteta CA, et al., 2023,
A study of CP violation in the decays <sup>B±</sup>→[<sup>K+</sup><sup>K-</sup><sup>π+</sup><sup>π-</sup>]D<sup>h±</sup> (h= K, π) and <sup>B±</sup>→[<sup>π+</sup><sup>π-</sup><sup>π+</sup><sup>π-</sup>]D<sup>h±</sup>
, European Physical Journal C, Vol: 83, ISSN: 1434-6044The first study of CP violation in the decay mode B±→[K+K-π+π-]Dh± , with h= K, π , is presented, exploiting a data sample of proton–proton collisions collected by the LHCb experiment that corresponds to an integrated luminosity of 9 \,fb - 1 . The analysis is performed in bins of phase space, which are optimised for sensitivity to local CP asymmetries. CP -violating observables that are sensitive to the angle γ of the Unitarity Triangle are determined. The analysis requires external information on charm-decay parameters, which are currently taken from an amplitude analysis of LHCb data, but can be updated in the future when direct measurements become available. Measurements are also performed of phase-space integrated observables for B±→[K+K-π+π-]Dh± and B±→[π+π-π+π-]Dh± decays.
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Journal articleRossi R, Esposito L, Pesaresi M, et al., 2023,
Track reconstruction and analysis of particle interactions in short bent crystals
, Journal of Instrumentation, Vol: 18Measurements of the interaction of positively charged particles with bent crystals were obtained by developing a new and consolidated analysis method, for the use of UA9 collaboration. The method was deployed to characterize crystals with a length of a few mm along the beam direction and a bending angle in the order of 10 μrad to 100 μrad, typically exploited in the CERN accelerators. To assess their properties and quality, the crystals have been investigated in the Super Proton Synchrotron North Area with a beam of mixed hadrons at 180 GeV. The UA9 telescopic tracker has been used to collect the data. Some of them are used in the present study to describe and validate the applied data-analysis methodology.
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Journal articleAbud AA, Abi B, Acciarri R, et al., 2023,
Identification and reconstruction of low-energy electrons in the ProtoDUNE-SP detector
, PHYSICAL REVIEW D, Vol: 107, ISSN: 2470-0010- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for long-lived particles decaying to a pair of muons in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for Higgs boson decays to a Z boson and a photon in proton-proton collisions at √s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Search for heavy resonances and quantum black holes in eμ, eτ, and μτ final states in proton-proton collisions at √<i>s</i>=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleShinoki M, Abe K, Hayato Y, et al., 2023,
Measurement of the cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water
, PHYSICAL REVIEW D, Vol: 107, ISSN: 2470-0010 -
Journal articleAgarwal A, Budd H, Capo J, et al., 2023,
Total neutron cross-section measurement on CH with a novel 3D-projection scintillator detector
, PHYSICS LETTERS B, Vol: 840, ISSN: 0370-2693- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Strange hadron collectivity in pPb and PbPb collisions
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleApple S, Alvarez AD, Kenyon SP, et al., 2023,
Design and performance characterization of a new LISA-like (laser interferometer space antenna-like) gravitational reference sensor and torsion pendulum testbed
, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 94, ISSN: 0034-6748- Author Web Link
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- Citations: 2
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Journal articleHall G, Grillo AA, 2023,
ASICs for LHC intermediate tracking detectors
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1050, ISSN: 0168-9002 -
Journal articleAbbiendi G, Maestre JA, Fernandez AA, et al., 2023,
The Analytical Method algorithm for trigger primitives generation at the LHC Drift Tubes detector
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1049, ISSN: 0168-9002 -
Journal articleAbud AA, Abi B, Acciarri R, et al., 2023,
Highly-parallelized simulation of a pixelated LArTPC on a GPU
, JOURNAL OF INSTRUMENTATION, Vol: 18, ISSN: 1748-0221 -
Journal articleAdam W, Bergauer T, Damanakis K, et al., 2023,
Test beam performance of a CBC3-based mini-module for the Phase-2 CMS Outer Tracker before and after neutron irradiation
, JOURNAL OF INSTRUMENTATION, Vol: 18, ISSN: 1748-0221 -
Journal articleArmano M, Audley H, Baird J, et al., 2023,
Charging of free-falling test masses in orbit due to cosmic rays: Results from LISA Pathfinder
, Physical Review D, Vol: 107, ISSN: 2470-0010A comprehensive summary of the measurements made to characterize test-mass charging due to the space environment during the LISA Pathfinder mission is presented. Measurements of the residual charge of the test mass after release by the grabbing and positioning mechanism show that the initial charge of the test masses was negative after all releases, leaving the test mass with a potential in the range from -12 to -512. Variations in the neutral test-mass charging rate between 21.7 and 30.7 e s-1 were observed over the course of the 17-month science operations produced by cosmic ray flux changes including a Forbush decrease associated with a small solar energetic particle event. A dependence of the cosmic ray charging rate on the test-mass potential between -30.2 and -40.3 e s-1 V-1 was observed resulting in an equilibrium test-mass potential between 670 and 960 mV, and this is attributed to a contribution to charging from low-energy electrons emitted from the gold surfaces of the gravitational reference sensor. Data from the onboard particle detector show a reliable correlation with the charging rate and with other environmental monitors of the cosmic ray flux. This correlation is exploited to extrapolate test-mass charging rates to a 20-year period giving useful insight into the expected range of charging rate that may be observed in the LISA mission.
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Journal articleAcero MA, Adamson P, Aliaga L, et al., 2023,
Measurement of the double-differential muon-neutrino charged-current inclusive cross section in the NOvA near detector
, Physical Review D, Vol: 107, ISSN: 2470-0010We report cross-section measurements of the final-state muon kinematics for νμ charged-current interactions in the NOvA near detector using an accumulated 8.09×1020 protons on target in the NuMI beam. We present the results as a double-differential cross section in the observed outgoing muon energy and angle, as well as single-differential cross sections in the derived neutrino energy, Eν, and square of the four-momentum transfer, Q2. We compare the results to inclusive cross-section predictions from various neutrino event generators via χ2 calculations using a covariance matrix that accounts for bin-to-bin correlations of systematic uncertainties. These comparisons show a clear discrepancy between the data and each of the tested predictions at forward muon angle and low Q2, indicating a missing suppression of the cross section in current neutrino-nucleus scattering models.
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2023,
Publisher Correction: Observation of triple J/ψ meson production in proton-proton collisions (Nature Physics, (2023), 19, 3, (338-350), 10.1038/s41567-022-01838-y)
, Nature Physics, Vol: 19, ISSN: 1745-2473Correction to: Nature Physics. Published online 19 January 2023. In the version of this article initially published, the first affiliation—Yerevan Physics Institute, Yerevan, Armenia—was missing from the list of author affiliations and has now been inserted in the HTML and PDF versions of the article.
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Journal articleUchida K, Hall G, 2023,
Studies of the CBC3.1 readout ASIC for CMS 2S-modules
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1048, ISSN: 0168-9002
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