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Study of High-Transverse-momentum Higgs Boson Production in Association with a Vector Boson in the qqbb Final State with the ATLAS Detector

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Physical Review Letters 2024年第13期132卷 131802-131802页

作者： G. Aad B. Abbott K. Abeling N. J. Abicht S. H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya C. Adam Bourdarios L. Adamczyk S. V. Addepalli m. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik m. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar S. Aktas K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy S. Alderweireldt Z. L. Alegria m. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H. m. J. Ali S. Ali S. W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B. m. m. Allbrooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m. G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C. G. Ames D. Amidei S. P. Amor Dos Santos K. R. Amos V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel m. T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J. A. Aparisi Pozo m. A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S. J. Arbiol Val C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N. A. Asbah K. Assamagan R. Astalos S. Atashi R. J. Atkin m. Atkinson H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea T. m. Baer P. Bagnaia m. Bahmani D. Bahner A. J. Bailey V. R. Bailey J. T. Baines L. Baines O. K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E. m. Baldin P. Balek E. Ballabene F. Balli L. m. Baltes W. K. Balunas J. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E. L. Barberio D. Barberis m. Barbero m. CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton New York USA Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York New York USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Brandeis University Waltham Massachusetts USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Enrico Fermi Institute University of Chicago Chicago Illinois USA Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania CERN Geneva Switzerland Affiliated with an international laboratory covered by a cooperation agreement with CERN Department of Physics McGill University Montreal Quebec Canada Department of Physics Royal Holloway University of

This Letter presents the first study of Higgs boson production in association with a vector boson (V=W or Z) in the fully hadronic qqbb final state using data recorded by the ATLAS detector at the LHC in proton-proton collisions at s=13 TeV and corresponding to an integrated luminosity of 137 fb−1. The vector bosons and Higgs bosons are each reconstructed as large-radius jets and tagged using jet substructure techniques. Dedicated tagging algorithms exploiting b-tagging properties are used to identify jets consistent with Higgs bosons decaying into bb¯. Dominant backgrounds from multijet production are determined directly from the data, and a likelihood fit to the jet mass distribution of Higgs boson candidates is used to extract the number of signal events. The VH production cross section is measured inclusively and differentially in several ranges of Higgs boson transverse momentum: 250–450, 450–650, and greater than 650 GeV. The inclusive signal yield relative to the standard model expectation is observed to be μ=1.4−0.9+1.0 and the corresponding cross section is 3.1±1.3(stat)−1.4+1.8(syst) pb.

关键词： Signatures with Higgs bosons Bottom quark Higgs bosons W & Z bosons Hadron colliders

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Search for singly produced vectorlike top partners in multilepton final states with 139 fb−1 of pp collision data at s=13 TeV with the ATLAS detector

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Physical Review D 2024年第11期109卷 112012-112012页

作者： G. Aad B. Abbott K. Abeling N. J. Abicht S. H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti A. C. Abusleme Hoffman B. S. Acharya C. Adam Bourdarios L. Adamczyk L. Adamek S. V. Addepalli m. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik m. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy S. Alderweireldt m. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi m. Algren m. Alhroob B. Ali H. m. J. Ali S. Ali S. W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B. m. m. Allbrooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m. G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C. G. Ames D. Amidei S. P. Amor Dos Santos K. R. Amos V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel m. T. Anthony E. Antipov m. Antonelli D. J. A. Antrim F. Anulli m. Aoki T. Aoki J. A. Aparisi Pozo m. A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold Z. P. Arrubarrena Tame G. Artoni H. Asada K. Asai S. Asai N. A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R. J. Atkin m. Atkinson N. B. Atlay H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia m. Bahmani A. J. Bailey V. R. Bailey J. T. Baines L. Baines C. Bakalis O. K. Baker E. Bakos D. Bakshi Gupta R. Balasubramanian E. m. Baldin P. Balek E. Ballabene F. Balli L. m. Baltes W. K. Balunas J. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E. L. Bar CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton New York USA Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York New York USA Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics University of Toronto Toronto Ontario Canada Department of Physics Brandeis University Waltham Massachusetts USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA CERN Geneva Switzerland Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Affiliated with an international laboratory covered by a cooperation agreement with CERN Department of Physics McGill

A search for the single production of a vectorlike top partner (T) with mass greater than 1 TeV decaying into a Z boson and a top quark is presented, using the full Run 2 dataset corresponding to 139 fb−1 of pp collisions at s=13 TeV, collected in 2015–2018 with the ATLAS detector at the Large Hadron Collider. The targeted final state is characterized by the presence of a pair of electrons or muons with opposite-sign charges which form a Z-boson candidate, as well as by the presence of b-tagged jets and forward jets. Events with exactly two or at least three leptons are categorized into two independently optimized analysis channels. No significant excess above the background expectation is observed and the results from the two channels are statistically combined to set exclusion limits at 95% confidence level on the masses and couplings of T. The results are interpreted in several benchmark scenarios to set limits on the mass and universal coupling strength (κ) of the vectorlike quark. For singlet T quarks, κ values between 0.22 and 0.64 are excluded for masses between 1000 and 1975 GeV. For T quarks in the doublet scenario, where the production cross section is much lower, κ values between 0.54 and 0.88 are excluded for masses between 1000 and 1425 GeV.

关键词： Composite models Signatures with W or Z bosons Signatures with light leptons Signatures with new fermions Signatures with top quarks Hypothetical fermions

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Search for a new Z′ gauge boson via the pp→W±(*)→Z′μ±ν→μ±μ∓μ±ν process in pp collisions at s=13 TeV with the ATLAS detector

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Physical Review D 2024年第7期110卷 072008页

作者： G. Aad E. Aakvaag B. Abbott K. Abeling N. J. Abicht S. H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya C. Adam Bourdarios L. Adamczyk S. V. Addepalli m. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik m. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar S. Aktas K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy S. Alderweireldt Z. L. Alegria m. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H. m. J. Ali S. Ali S. W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B. m. m. Allbrooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m. G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C. G. Ames D. Amidei K. J. Amirie S. P. Amor Dos Santos K. R. Amos V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel m. T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J. A. Aparisi Pozo m. A. Aparo L. Aperio Bella C. Appelt A. Apyan S. J. Arbiol Val C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N. A. Asbah K. Assamagan R. Astalos S. Atashi R. J. Atkin m. Atkinson H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea T. m. Baer P. Bagnaia m. Bahmani D. Bahner K. Bai A. J. Bailey J. T. Baines L. Baines O. K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E. m. Baldin P. Balek E. Ballabene F. Balli L. m. Baltes W. K. Balunas J. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E. L. Barberio D. Barberis m. Barber CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Department for Physics and Technology University of Bergen Bergen Norway Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton New York USA Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York New York USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Brandeis University Waltham Massachusetts USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Enrico Fermi Institute University of Chicago Chicago Illinois USA Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania CERN Geneva Switzerland Affiliated with an international laboratory covered by a cooperation agreement with CERN Department of Physics McGill Univer

A search for a new Z′ gauge boson predicted by Lμ−Lτ models, based on charged-current Drell–Yan production, pp→W±(*)→Z′μ±ν→μ±μ∓μ±ν, is presented. The data sample used corresponds to an integrated luminosity of 140 fb−1 of proton–proton collisions at s=13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The search examines a final state of 3μ plus large missing transverse momentum. Upper limits are set on the Z′ production cross section times branching ratio in the mass range of 5–81 GeV. After combining with the previous Z′ search using the neutral-current Drell–Yan production with a 4μ final state, the most stringent exclusion limits to date are achieved in the parameter space of the Z′ coupling strength and mass.

关键词： Extensions of gauge sector Hypothetical gauge bosons W & Z bosons Hadron colliders

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Search for charged-lepton-flavor violating μτqt interactions in top-quark production and decay in pp collisions at s=13 TeV with the ATLAS detector at the LHC

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Physical Review D 2024年第1期110卷 012014-012014页

作者： G. Aad E. Aakvaag B. Abbott K. Abeling N. J. Abicht S. H. Abidi m. Aboelela A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya A. Ackermann C. Adam Bourdarios L. Adamczyk S. V. Addepalli m. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik m. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar S. Aktas K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy S. Alderweireldt Z. L. Alegria m. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H. m. J. Ali S. Ali S. W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B. m. m. Allbrooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m. G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C. G. Ames D. Amidei K. J. Amirie S. P. Amor Dos Santos K. R. Amos S. An V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel m. T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J. A. Aparisi Pozo m. A. Aparo L. Aperio Bella C. Appelt A. Apyan S. J. Arbiol Val C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N. A. Asbah K. Assamagan R. Astalos K. S. V. Astrand S. Atashi R. J. Atkin m. Atkinson H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea T. m. Baer P. Bagnaia m. Bahmani D. Bahner K. Bai J. T. Baines L. Baines O. K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E. m. Baldin P. Balek E. Ballabene F. Balli L. m. Baltes W. K. Balunas J. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Department for Physics and Technology University of Bergen Bergen Norway Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton New York USA Physics Department Southern Methodist University Dallas Texas USA Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York New York USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Kirchhoff-Institut für Physik Ruprecht-Karls-Universität Heidelberg Heidelberg Germany LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Brandeis University Waltham Massachusetts USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Enrico Fermi Institute University of Chicago Chicago Illinois USA Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romani

A search for charged-lepton-flavor violating μτqt (q=u, c) interactions is presented, considering both top-quark production and decay. The data analyzed correspond to 140 fb−1 of proton-proton collisions at a center-of-mass energy of s=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. The analysis targets events containing two muons with the same electric charge, a hadronically decaying τ-lepton and at least one jet, with exactly one b-tagged jet, produced by a μτqt interaction. Agreement with the Standard model expectation within 1.6 standard deviations is observed, and limits are set at the 95% confidence level (CL) on the charged-lepton-flavor violation branching ratio of B(t→μτq)<8.7×10−7. An effective field theory interpretation is performed yielding 95% CL limits on Wilson coefficients, dependent on the flavor of the associated light quark and the Lorentz structure of the coupling. These range from |clequ3(2313)|/Λ2<0.10 TeV−2 for μτut to |clequ1(2323)|/Λ2<1.8 TeV−2 for μτct. An additional interpretation is performed for scalar leptoquark production inducing charged-lepton-flavor violation, with fixed intergenerational couplings. Upper limits on leptoquark coupling strengths are set at the 95% CL, ranging from λLQ=1.3 to λLQ=3.7 for leptoquark masses between 0.5 and 2.0 TeV.

关键词： Hadron colliders Particle decays

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Search for low-mass resonances decaying into two jets and produced in association with a photon or a jet at s=13 TeV with the ATLAS detector

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Physical Review D 2024年第3期110卷 032002-032002页

作者： G. Aad E. Aakvaag B. Abbott K. Abeling N. J. Abicht S. H. Abidi m. Aboelela A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya A. Ackermann C. Adam Bourdarios L. Adamczyk S. V. Addepalli m. J. Addison J. Adelman A. Adiguzel T. Adye A. A. Affolder Y. Afik m. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W. S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T. P. A. Åkesson A. V. Akimov D. Akiyama N. N. Akolkar S. Aktas K. Al Khoury G. L. Alberghi J. Albert P. Albicocco G. L. Albouy S. Alderweireldt Z. L. Alegria m. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H. m. J. Ali S. Ali S. W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B. m. m. Allbrooke J. F. Allen C. A. Allendes Flores P. P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m. G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C. G. Ames D. Amidei K. J. Amirie S. P. Amor Dos Santos K. R. Amos S. An V. Ananiev C. Anastopoulos T. Andeen J. K. Anders S. Y. Andrean A. Andreazza S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel m. T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J. A. Aparisi Pozo m. A. Aparo L. Aperio Bella C. Appelt A. Apyan S. J. Arbiol Val C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N. A. Asbah K. Assamagan R. Astalos K. S. V. Astrand S. Atashi R. J. Atkin m. Atkinson H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio A. D. Auriol V. A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea T. m. Baer P. Bagnaia m. Bahmani D. Bahner K. Bai J. T. Baines L. Baines O. K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E. m. Baldin P. Balek E. Ballabene F. Balli L. m. Baltes W. K. Balunas J. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Department for Physics and Technology University of Bergen Bergen Norway Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton New York USA Physics Department Southern Methodist University Dallas Texas USA Faculté des Sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York New York USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Kirchhoff-Institut für Physik Ruprecht-Karls-Universität Heidelberg Heidelberg Germany LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Brandeis University Waltham Massachusetts USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Enrico Fermi Institute University of Chicago Chicago Illinois USA Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi

A search is performed for localized excesses in the low-mass dijet invariant mass distribution, targeting a hypothetical new particle decaying into two jets and produced in association with either a high transverse momentum photon or a jet. The search uses the full Run 2 data sample from LHC proton-proton collisions collected by the ATLAS experiment at a center-of-mass energy of 13 TeV during 2015–2018. Two variants of the search are presented for each type of initial-state radiation: one that makes no jet flavor requirements and one that requires both of the jets to have been identified as containing b-hadrons. No excess is observed relative to the Standard model prediction, and the data are used to set upper limits on the production cross section for a benchmark Z′ model and, separately, for generic, beyond the Standard model scenarios which might produce a Gaussian-shaped contribution to dijet invariant mass distributions. The results extend the current constraints on dijet resonances to the mass range between 200 and 650 GeV.

关键词： Hypothetical particle production Signatures with jets Signatures with photons Weak boson production

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Search for short- and long-lived axion-like particles in decays with the ATLAS experiment at the LHC

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The European Physical Journal C 2024年第7期84卷 1-31页

作者： Aad, G. Abbott, B. Abeling, K. Abicht, N. J. Abidi, S. H. Aboulhorma, A. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B. S. Bourdarios, C. Adam Adamczyk, L. Addepalli, S. V. Addison, m. J. Adelman, J. Adiguzel, A. Adye, T. Affolder, A. A. Afik, Y. Agaras, m. N. Agarwala, J. Aggarwal, A. Agheorghiesei, C. Ahmad, A. Ahmadov, F. Ahmed, W. S. Ahuja, S. Ai, X. Aielli, G. Aikot, A. Tamlihat, m. Ait Aitbenchikh, B. Aizenberg, I. Akbiyik, m. Åkesson, T. P. A. Akimov, A. V. Akiyama, D. Akolkar, N. N. Khoury, K. Al Alberghi, G. L. Albert, J. Albicocco, P. Albouy, G. L. Alderweireldt, S. Aleksa, m. Aleksandrov, I. N. Alexa, C. Alexopoulos, T. Alfonsi, F. Algren, m. Alhroob, m. Ali, B. Ali, H. m. J. Ali, S. Alibocus, S. W. Aliev, m. Alimonti, G. Alkakhi, W. Allaire, C. Allbrooke, B. m. m. Allen, J. F. Flores, C. A. Allendes Allport, P. P. Aloisio, A. Alonso, F. Alpigiani, C. Estevez, m. Alvarez Fernandez, A. Alvarez Cardoso, m. Alves Alviggi, m. G. Aly, m. Coutinho, Y. Amaral Ambler, A. Amelung, C. Amerl, m. Ames, C. G. Amidei, D. Santos, S. P. Amor Dos Amos, K. R. Ananiev, V. Anastopoulos, C. Andeen, T. Anders, J. K. Andrean, S. Y. Andreazza, A. Angelidakis, S. Angerami, A. Anisenkov, A. V. Annovi, A. Antel, C. Anthony, m. T. Antipov, E. Antonelli, m. Anulli, F. Aoki, m. Aoki, T. Pozo, J. A. Aparisi Aparo, m. A. Bella, L. Aperio Appelt, C. Apyan, A. Aranzabal, N. Val, S. J. Arbiol Arcangeletti, C. Arce, A. T. H. Arena, E. Arguin, J-F. Argyropoulos, S. Arling, J.-H. Arnaez, O. Arnold, H. Artoni, G. Asada, H. Asai, K. Asai, S. Asbah, N. A. Assamagan, K. Astalos, R. Atashi, S. Atkin, R. J. Atkinson, m. Atmani, H. Atmasiddha, P. A. Augsten, K. Auricchio, S. Auriol, A. D. Austrup, V. A. Avolio, G. Axiotis, K. Azuelos, G. Babal, D. Bachacou, H. Bachas, K. Bachiu, A. Backman, F. Badea, A. Baer, T. m. Bagnaia, P. Bahmani, m. Bailey, A. J. Bailey, V. R. Baines, J. T. Baines, L. Baker, O. K. Bakos, E. Gupta, D. Bakshi Balakrishnan, V. Balasubramanian, R. Baldin, E. m. Balek, P. Ballabene, E. Balli, F. Baltes, L. m. Balunas, W. K. B CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman USA II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton USA Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel Department of Physics New York University New York USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King’s College London London UK LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Brandeis University Waltham USA School of Physics and Astronomy University of Manchester Manchester UK Department of Physics Northern Illinois University DeKalb USA Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot UK Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz USA CERN Geneva Switzerland Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Affiliated with an international laboratory covered by a cooperation agreement with CERN Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics McGill University Montreal Canada Department of Physics Royal Holloway University of London Egham

Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run&nbsp;2 data set of $$140\,\text {fb}^{-1}$$ of proton-proton collisions at a centre-of-mass energy o...

Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of $$140\,\text {fb}^{-1}$$ of proton-proton collisions at a centre-of-mass energy of $$13\,\text {TeV}$$ recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the $$(g-2)_\mu $$ discrepancy. This analysis covers an ALP mass range from 100 to $$62\,\text {GeV}$$ and ALP-photon couplings in the range $$10^{-7}\,\text {TeV}^{-1}

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mULTIDISCIPLINARY science IN THE mULTImESSENGER ERA

arXiv

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arXiv 2025年

作者： Burns, Eric Fryer, Christopher L. Agullo, Ivan Andrews, Jennifer Aydi, Elias Baring, matthew G. Baron, Eddie Boorman, Peter G. Boroumand, mohammad Ali Borowski, Eric Broekgaarden, Floor S. Calder, Alan Chandra, Poonam Chatzopoulos, Emmanouil Chen, Hsin-Yu Chipps, Kelly A. Civano, Francesca Comisso, Luca Cárdenas-Avendaño, Alejandro Dang, Phong Deibel, Catherine m. Eftekhari, Tarraneh Elliott, Courey Foley, Ryan J. Fontes, Christopher J. Gall, Amy Galleher, Gwendolyn R. Gonzalez, Gabriela Guo, Fan Babiuc Hamilton, maria C. Harding, J. Patrick Henning, Joseph Herwig, Falk Hix, William Raphael Ho, Anna Y.Q. Holley-Bockelmann, Kelly Hounsell, Rebekah Hui, C. michelle Humensky, Thomas Brian Hungerford, Aimee Hynes, Robert I. Jin, Weidong Johns, Heather Johnson, maria Gatu Kelly, Bernard J. Kennea, Jamie A. Kuranz, Carolyn Lamb, Gavin P. Launey, Kristina D. Lewis, Tiffany R. Liodakis, Ioannis Livescu, Daniel Loch, Stuart macDonald, Nicholas R. maccarone, Thomas marcotulli, Lea meli, Athina messer, Bronson miller, m. Coleman milton, Valarie most, Elias R. mumma, Darin C. mumpower, matthew R. Negro, michela Neights, Eliza Nugent, Peter Pasham, Dheeraj R. Radice, David Rani, Bindu Read, Jocelyn S. Reifarth, Rene Reily, Emily Rhodes, Lauren Richard, Andrea Ricker, Paul m. Roberts, Christopher J. Schatz, Hendrik Shawhan, Peter Takacs, Endre Tomsick, John A. Trigg, Aaron C. Urbatsch, Todd Vassh, Nicole Villar, V. Ashley Wadiasingh, Zorawar Waratkar, Gaurav Zingale, michael Department of Physics & Astronomy Louisiana State University Baton RougeLA70803 United States Center for Nonlinear Studies Los Alamos National Laboratory Los AlamosNM87545 United States Gemini Observatory NSF’s NOIRLab 670 N. A’ohoku Place HiloHI96720 United States Department of Physics & Astronomy Texas Tech University Box 41051 LubbockTX79409-1051 United States Department of Physics and Astronomy Rice University MS 108 6100 Main Street HoustonTX77251-1892 United States Planetary Science Institute 1700 East Fort Lowell Road Suite 106 TucsonAZ85719-2395 United States Cahill Center for Astrophysics California Institute of Technology 1216 East California Boulevard PasadenaCA91125 United States Department of Astronomy and Astrophysics University of California La Jolla San DiegoCA92093 United States Department of Physics & Astronomy Stony Brook University Stony BrookNY11794 United States National Radio Astronomy Observatory 520 Edgemont Rd CharlottesvilleVA22903 United States Department of Physics University of Texas at Austin AustinTX78712 United States Physics Division Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831 United States NASA Goddard Space Flight Center 8800 Greenbelt Rd GreenbeltMD20771 United States Department of Astronomy Columbia Astrophysics Laboratory Columbia University New YorkNY10027 United States Northwestern University 1800 Sherman Avenue EvanstonIL60201 United States Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States Computational Physics Division Los Alamos National Laboratory Los AlamosNM87545 United States Smithsonian Astrophysical Observatory CambridgeMA02138 United States Theoretical Division Los Alamos National Laboratory Los AlamosNM87545 United States Department of Mathematics and Physics Marshall University HuntingtonWV25755 United States Physics Division Los Alamos National Laboratory Los AlamosNM87545 United St

Astrophysical observations of the cosmos allow us to probe extreme physicsand answer foundational questions on our universe. modern astronomy isincreasingly operating under a holistic approach, probing the same questionwith multiple diagnostics including how sources vary over time, how they appearacross the electromagnetic spectrum, and through their other signatures,including gravitational waves, neutrinos, cosmic rays, and dust on *** observations are now reaching the point where approximate physicsmodels are insufficient. Key sources of interest are explosive transients,whose understanding requires multidisciplinary studies at the intersection ofastrophysics, gravity, nuclear science, plasma physics, fluid dynamics andturbulence, computation, particle physics, atomic, molecular, and opticalscience, condensed matter and materials science, radiation transport, and highenergy density physics. This white paper provides an overview of the majorscientific advances that lay at the intersection of physics and astronomy andare best probed through time-domain and multimessenger astrophysics, anexploration of how multidisciplinary science can be fostered, and introductorydescriptions of the relevant scientific disciplines and key astrophysicalsources of interest. © 2025, CC BY.

关键词： Dark matter

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Azimuthal Correlations within Exclusive Dijets with Large momentum Transfer in Photon-Lead Collisions

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Physical Review Letters 2023年第5期131卷 051901-051901页

作者： A. Tumasyan W. Adam T. Bergauer m. Dragicevic A. Escalante Del Valle R. Frühwirth m. Jeitler N. Krammer L. Lechner D. Liko I. mikulec F. m. Pitters N. Rad J. Schieck R. Schöfbeck m. Spanring S. Templ W. Waltenberger C.-E. Wulz m. Zarucki m. R. Darwish E. A. De Wolf D. Di Croce T. Janssen T. Kello A. Lelek m. Pieters H. Rejeb Sfar H. Van Haevermaet P. Van mechelen S. Van Putte N. Van Remortel F. Blekman E. S. Bols S. S. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi S. Lowette I. marchesini S. moortgat A. morton D. müller Q. Python S. Tavernier W. Van Doninck P. Van mulders D. Beghin B. Bilin B. Clerbaux G. De Lentdecker B. Dorney L. Favart A. Grebenyuk A. K. Kalsi I. makarenko L. moureaux L. Pétré A. Popov N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom L. Wezenbeek T. Cornelis D. Dobur m. Gruchala I. Khvastunov m. Niedziela C. Roskas K. Skovpen m. Tytgat W. Verbeke B. Vermassen m. Vit G. Bruno F. Bury C. Caputo P. David C. Delaere m. Delcourt I. S. Donertas A. Giammanco V. Lemaitre K. mondal J. Prisciandaro A. Taliercio m. Teklishyn P. Vischia S. Wertz S. Wuyckens G. A. Alves C. Hensel A. moraes W. L. Aldá Júnior E. Belchior Batista Das Chagas H. Brandao malbouisson W. Carvalho J. Chinellato E. Coelho E. m. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza J. martins D. matos Figueiredo m. medina Jaime C. mora Herrera L. mundim H. Nogima P. Rebello Teles L. J. Sanchez Rosas A. Santoro S. m. Silva Do Amaral A. Sznajder m. Thiel F. Torres Da Silva De Araujo A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. m. Gregores D. S. Lemos P. G. mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev I. Atanassov R. Hadjiiska P. Iaydjiev m. misheva m. Rodozov m. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov T. Cheng W. Fang Q. Guo H. Wang L. Yuan m. Ahmad G. Bauer Z. Hu Y. Wang K. Yi E. Chapon G. m. Chen H. S. Chen m. Chen T. Javaid A. Kapoor D. Leggat H. Liao Z.-A. Liu R. Sharma A. Spiezia J. Tao J. Thomas-Wil Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China Rutgers The State University of New Jersey Piscataway New Jersey USA Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Bioph

The structure of nucleons is multidimensional and depends on the transverse momenta, spatial geometry, and polarization of the constituent partons. Such a structure can be studied using high-energy photons produced in ultraperipheral heavy-ion collisions. The first measurement of the azimuthal angular correlations of exclusively produced events with two jets in photon-lead interactions at large momentum transfer is presented, a process that is considered to be sensitive to the underlying nuclear gluon polarization. This study uses a data sample of ultraperipheral lead-lead collisions at sNN=5.02 TeV, corresponding to an integrated luminosity of 0.38 nb−1, collected with the CmS experiment at the LHC. The measured second harmonic of the correlation between the sum and difference of the two jet transverse momentum vectors is found to be positive, and rising, as the dijet transverse momentum increases. A well-tuned model that has been successful at describing a wide range of proton scattering data from the HERA experiments fails to describe the observed correlations, suggesting the presence of gluon polarization effects.

关键词： Quark & gluon jets Relativistic heavy-ion collisions

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Search for Higgs Boson and Observation of Z Boson through Their Decay into a Charm Quark-Antiquark Pair in Boosted Topologies in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2023年第4期131卷 041801-041801页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. Bergauer S. Chatterjee K. Damanakis m. Dragicevic A. Escalante Del Valle P. S. Hussain m. Jeitler N. Krammer L. Lechner D. Liko I. mikulec P. Paulitsch J. Schieck R. Schöfbeck D. Schwarz m. Sonawane S. Templ W. Waltenberger C.-E. Wulz m. R. Darwish T. Janssen T. Kello H. Rejeb Sfar P. Van mechelen E. S. Bols J. D’Hondt A. De moor m. Delcourt H. El Faham S. Lowette A. morton D. müller A. R. Sahasransu S. Tavernier W. Van Doninck S. Van Putte D. Vannerom B. Clerbaux G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee m. mahdavikhorrami I. makarenko A. malara S. Paredes L. Pétré N. Postiau L. Thomas m. Vanden Bemden C. Vander Velde P. Vanlaer D. Dobur J. Knolle L. Lambrecht G. mestdach C. Rendón A. Samalan K. Skovpen m. Tytgat N. Van Den Bossche B. Vermassen L. Wezenbeek A. Benecke G. Bruno F. Bury C. Caputo P. David C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre K. mondal A. Taliercio T. T. Tran P. Vischia S. Wertz G. A. Alves E. Coelho C. Hensel A. moraes P. Rebello Teles W. L. Aldá Júnior m. Alves Gallo Pereira m. Barroso Ferreira Filho H. Brandao malbouisson W. Carvalho J. Chinellato E. m. Da Costa G. G. Da Silveira D. De Jesus Damiao V. Dos Santos Sousa S. Fonseca De Souza J. martins C. mora Herrera K. mota Amarilo L. mundim H. Nogima A. Santoro S. m. Silva Do Amaral A. Sznajder m. Thiel A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. m. Gregores P. G. mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev m. misheva m. Rodozov m. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov E. Shumka S. Thakur T. Cheng T. Javaid m. mittal L. Yuan m. Ahmad G. Bauer Z. Hu S. Lezki K. Yi G. m. Chen H. S. Chen m. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu V. milosevic F. monti R. Sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. An Y. Ban A. Levin C. Li Q. Li X. Lyu Y. mao S. J. Qian X. Sun D. Wang J. Xiao H. Yang m. Lu Z. You N. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto de Alta Investigacion Universidad de Tarapaca Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Phys

A search for the standard model (Sm) Higgs boson (H) produced with transverse momentum (pT) greater than 450 GeV and decaying to a charm quark-antiquark (cc¯) pair is presented. The search is performed using proton-proton collision data collected at s=13 TeV by the CmS experiment at the LHC, corresponding to an integrated luminosity of 138 fb−1. Boosted H→cc¯ decay products are reconstructed as a single large-radius jet and identified using a deep neural network charm tagging technique. The method is validated by measuring the Z→cc¯ decay process, which is observed in association with jets at high pT for the first time with a signal strength of 1.00−0.14+0.17(syst)±0.08(theo)±0.06(stat), defined as the ratio of the observed process rate to the Sm expectation. The observed (expected) upper limit on σ(H)B(H→cc¯) is set at 47 (39) times the Sm prediction at 95% confidence level.

关键词： Charm quark Higgs bosons W & Z bosons Hadron colliders

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measurement of the Dependence of the Hadron Production Fraction Ratios fs/fu and fd/fu on B meson Kinematic Variables in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2023年第12期131卷 121901-121901页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. Bergauer S. Chatterjee K. Damanakis m. Dragicevic A. Escalante Del Valle P. S. Hussain m. Jeitler N. Krammer L. Lechner D. Liko I. mikulec P. Paulitsch J. Schieck R. Schöfbeck D. Schwarz m. Sonawane S. Templ W. Waltenberger C.-E. Wulz m. R. Darwish T. Janssen T. Kello H. Rejeb Sfar P. Van mechelen E. S. Bols J. D’Hondt A. De moor m. Delcourt H. El Faham S. Lowette A. morton D. müller A. R. Sahasransu S. Tavernier W. Van Doninck S. Van Putte D. Vannerom B. Clerbaux G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee m. mahdavikhorrami I. makarenko A. malara S. Paredes L. Pétré N. Postiau L. Thomas m. Vanden Bemden C. Vander Velde P. Vanlaer D. Dobur J. Knolle L. Lambrecht G. mestdach C. Rendón A. Samalan K. Skovpen m. Tytgat N. Van Den Bossche B. Vermassen L. Wezenbeek A. Benecke G. Bruno F. Bury C. Caputo P. David C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre K. mondal A. Taliercio T. T. Tran P. Vischia S. Wertz G. A. Alves E. Coelho C. Hensel A. moraes P. Rebello Teles W. L. Aldá Júnior m. Alves Gallo Pereira m. Barroso Ferreira Filho H. Brandao malbouisson W. Carvalho J. Chinellato E. m. Da Costa G. G. Da Silveira D. De Jesus Damiao V. Dos Santos Sousa S. Fonseca De Souza J. martins C. mora Herrera K. mota Amarilo L. mundim H. Nogima A. Santoro S. m. Silva Do Amaral A. Sznajder m. Thiel A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. m. Gregores P. G. mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev m. misheva m. Rodozov m. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov E. Shumka S. Thakur T. Cheng T. Javaid m. mittal L. Yuan m. Ahmad G. Bauer Z. Hu S. Lezki K. Yi G. m. Chen H. S. Chen m. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu V. milosevic F. monti R. Sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. An Y. Ban A. Levin C. Li Q. Li X. Lyu Y. mao S. J. Qian X. Sun D. Wang J. Xiao H. Yang m. Lu Z. You N. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Phys

The dependence of the ratio between the Bs0 and B+ hadron production fractions, fs/fu, on the transverse momentum (pT) and rapidity of the B mesons is studied using the decay channels Bs0→J/ψϕ and B+→J/ψK+. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CmS experiment in 2018 and corresponding to an integrated luminosity of 61.6 fb−1. The fs/fu ratio is observed to depend on the B pT and to be consistent with becoming asymptotically constant at large pT. No rapidity dependence is observed. The ratio of the B0 to B+ meson production fractions, fd/fu, is also measured, for the first time in proton-proton collisions, using the B0→J/ψK*0 decay channel. The result is found to be within 1 standard deviation of unity and independent of pT and rapidity, as expected from isospin invariance.

关键词： Bottom mesons Hadron colliders

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