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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for new particles in an extended Higgs sector with four b quarks in the final state at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo><mml:mn>13</mml:mn><mml:mrow><mml:mspace width="0.20em" /><mml:mtext>TeV</mml:mtext></mml:mrow></mml:math>
, Physics Letters B, Vol: 835, Pages: 137566-137566, ISSN: 0370-2693 -
Journal articleTumasyan A, Adam W, Ambrogi F, et al., 2022,
Nuclear modification of Y states in pPb collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo><mml:mn>5.02</mml:mn><mml:mspace width="0.2em" /><mml:mtext>TeV</mml:mtext></mml:math>
, Physics Letters B, Vol: 835, Pages: 137397-137397, ISSN: 0370-2693 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in association with two jets in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo><mml:mn>13</mml:mn></mml:math> TeV
, Physics Letters B, Vol: 834, Pages: 137438-137438, ISSN: 0370-2693 -
Journal articleTouboul P, Metris G, Rodrigues M, et al., 2022,
Result of the MICROSCOPE weak equivalence principle test
, CLASSICAL AND QUANTUM GRAVITY, Vol: 39, ISSN: 0264-9381- Author Web Link
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- Citations: 7
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
, NATURE PHYSICS, ISSN: 1745-2473- Author Web Link
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- Citations: 3
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Journal articleAbud AA, Abi B, Acciarri R, et al., 2022,
Separation of track- and shower-like energy deposits in ProtoDUNE-SP using a convolutional neural network
, EUROPEAN PHYSICAL JOURNAL C, Vol: 82, ISSN: 1434-6044 -
Journal articleAkerib DS, Alsum S, Araújo HM, et al., 2022,
Fast and flexible analysis of direct dark matter search data with machine learning
, Physical Review D, Vol: 106, ISSN: 2470-0010We present the results from combining machine learning with the profile likelihood fit procedure, using data from the Large Underground Xenon (LUX) dark matter experiment. This approach demonstrates reduction in computation time by a factor of 30 when compared with the previous approach, without loss of performance on real data. We establish its flexibility to capture nonlinear correlations between variables (such as smearing in light and charge signals due to position variation) by achieving equal performance using pulse areas with and without position-corrections applied. Its efficiency and scalability furthermore enables searching for dark matter using additional variables without significant computational burden. We demonstrate this by including a light signal pulse shape variable alongside more traditional inputs, such as light and charge signal strengths. This technique can be exploited by future dark matter experiments to make use of additional information, reduce computational resources needed for signal searches and simulations, and make inclusion of physical nuisance parameters in fits tractable.
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Journal articleAbe K, Akhlaq N, Akutsu R, et al., 2022,
Scintillator ageing of the T2K near detectors from 2010 to 2021
, Journal of Instrumentation, Vol: 17The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interactions at its near detector complex. Over 10 years of operation the measured light yield recorded by the scintillator based subsystems has been observed to degrade by 0.9-2.2% per year. Extrapolation of the degradation rate through to 2040 indicates the recorded light yield should remain above the lower threshold used by the current reconstruction algorithms for all subsystems. This will allow the near detectors to continue contributing to important physics measurements during the T2K-II and Hyper-Kamiokande eras. Additionally, work to disentangle the degradation of the plastic scintillator and wavelength shifting fibres shows that the reduction in light yield can be attributed to the ageing of the plastic scintillator. The long component of the attenuation length of the wavelength shifting fibres was observed to degrade by 1.3-5.4% per year, while the short component of the attenuation length did not show any conclusive degradation.
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Journal articleArmano M, Audley H, Baird J, et al., 2022,
Transient acceleration events in LISA Pathfinder data: Properties and possible physical origin
, Physical Review D, Vol: 106, ISSN: 2470-0010We present an in depth analysis of the transient events, or glitches, detected at a rate of about one per day in the differential acceleration data of LISA Pathfinder. We show that these glitches fall in two rather distinct categories: fast transients in the interferometric motion readout on one side, and true force transient events on the other. The former are fast and rare in ordinary conditions. The second may last from seconds to hours and constitute the majority of the glitches. We present an analysis of the physical and statistical properties of both categories, including a cross-analysis with other time series like magnetic fields, temperature, and other dynamical variables. Based on these analyses we discuss the possible sources of the force glitches and identify the most likely, among which the outgassing environment surrounding the test-masses stands out. We discuss the impact of these findings on the LISA design and operation, and some risk mitigation measures, including experimental studies that may be conducted on the ground, aimed at clarifying some of the questions left open by our analysis.
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Journal articleTouboul P, Metris G, Rodrigues M, et al., 2022,
MICROSCOPE Mission: Final Results of the Test of the Equivalence Principle
, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for a W' boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state at root s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for high-mass resonances decaying to a jet and a Lorentz-boosted resonance in proton-proton collisions at root s=13 TeV
, PHYSICS LETTERS B, Vol: 832, ISSN: 0370-2693 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for Higgs Boson Pair Production in the Four b Quark Final State in Proton-Proton Collisions at sqrt[s]=13 TeV.
, Phys Rev Lett, Vol: 129A search for pairs of Higgs bosons produced via gluon and vector boson fusion is presented, focusing on the four b quark final state. The data sample consists of proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC, and corresponds to an integrated luminosity of 138 fb^{-1}. No deviation from the background-only hypothesis is observed. A 95% confidence level upper limit on the Higgs boson pair production cross section is observed at 3.9 times the standard model prediction for an expected value of 7.8. Constraints are also set on the modifiers of the Higgs field self-coupling, κ_{λ}, and of the coupling of two Higgs bosons to two vector bosons, κ_{2 V}. The observed (expected) allowed intervals at the 95% confidence level are -2.3<κ_{λ}<9.4 (-5.0<κ_{λ}<12.0) and -0.1<κ_{2 V}<2.2 (-0.4<κ_{2 V}<2.5). These are the most stringent observed constraints to date on the HH production cross section and on the κ_{2 V } coupling.
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Strategies and performance of the CMS silicon tracker alignment during LHC Run 2
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 1037, ISSN: 0168-9002 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Measurement of the Drell-Yan forward-backward asymmetry at high dilepton masses in proton-proton collisions at root s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleAbud AA, Abi B, Acciarri R, et al., 2022,
Scintillation light detection in the 6-m drift-length ProtoDUNE Dual Phase liquid argon TPC
, EUROPEAN PHYSICAL JOURNAL C, Vol: 82, ISSN: 1434-6044- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at root s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleScandale W, Arduini G, Cerutti F, et al., 2022,
Multiple scattering of channeled and non-channeled positively charged particles in bent monocrystalline silicon
, EUROPEAN PHYSICAL JOURNAL PLUS, Vol: 137, ISSN: 2190-5444 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for Flavor-Changing Neutral Current Interactions of the Top Quark and Higgs Boson in Final States with Two Photons in Proton-Proton Collisions at root s=13 TeV
, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for new physics in the lepton plus missing transverse momentum final state in proton-proton collisions at root 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., 2022,
Search for Resonances Decaying to Three W Bosons in Proton-Proton Collisions at root s=13 TeV
, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for resonances decaying to three W bosons in the hadronic final state in proton-proton collisions at root s=13 TeV
, PHYSICAL REVIEW D, Vol: 106, ISSN: 2470-0010 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Measurement of the inclusive and differential WZ production cross sections, polarization angles, and triple gauge couplings in pp collisions at root s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Probing Charm Quark Dynamics via Multiparticle Correlations in Pb-Pb Collisions at root s(NN)=5.02 TeV
, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Identification of hadronic tau lepton decays using a deep neural network
, JOURNAL OF INSTRUMENTATION, Vol: 17, ISSN: 1748-0221 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for heavy resonances decaying to Z (ν ν ¯)V (q q ¯ ′) in proton-proton collisions at s =13 TeV
, Physical Review D, Vol: 106, ISSN: 2470-0010A search is presented for heavy bosons decaying to Z(νν¯)V(qq¯′), where V can be a W or a Z boson. A sample of proton-proton collision data at s=13 TeV was collected by the CMS experiment during 2016-2018. The data correspond to an integrated luminosity of 137 fb-1. The event categorization is based on the presence of high-momentum jets in the forward region to identify production through weak vector boson fusion. Additional categorization uses jet substructure techniques and the presence of large missing transverse momentum to identify W and Z bosons decaying to quarks and neutrinos, respectively. The dominant standard model backgrounds are estimated using data taken from control regions. The results are interpreted in terms of radion, W′ boson, and graviton models, under the assumption that these bosons are produced via gluon-gluon fusion, Drell-Yan, or weak vector boson fusion processes. No evidence is found for physics beyond the standard model. Upper limits are set at 95% confidence level on various types of hypothetical new bosons. Observed (expected) exclusion limits on the masses of these bosons range from 1.2 to 4.0 (1.1 to 3.7) TeV.
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Journal articleTumasyan A, Adam W, Bergauer T, et al., 2022,
First Search for Exclusive Diphoton Production at High Mass with Tagged Protons in Proton-Proton Collisions at root s=13 TeV
, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007 -
Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479- Author Web Link
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- Citations: 2
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Observation of the B-c(+) Meson in Pb-Pb and pp Collisions at root s(NN)=5.02 TeV and Measurement of its Nuclear Modification Factor
, PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007- Author Web Link
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- Citations: 1
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Journal articleTumasyan A, Adam W, Andrejkovic JW, et al., 2022,
Search for charged-lepton flavor violation in top quark production and decay in pp collisions at root s=13 TeV
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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