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Hard color-singlet exchange in dijet events in proton-proton collisions at s=13 TeV

Physical Review D 2021年第3期104卷 032009-032009页

作者： A. M. sirunyan A. Tumasyan W. Adam F. Ambrogi T. bergauer M. Dragicevic J. erö A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko T. Madlener I. Mikulec F. M. Pitters N. Rad J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko J. suarez Gonzalez M. R. Darwish e. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb sfar H. Van Haevermaet P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols s. s. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi s. Lowette I. Marchesini s. Moortgat A. Morton Q. Python s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker H. Delannoy 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. Wezenb.e. 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. Wuyckens J. Zobec G. A. Alves G. Correia silva 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 M. Melo De Almeida 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 e. J. Tonelli Manganote 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 R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov M. bonchev A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov W. Fang Q. Guo H. Wang L. Yuan M. Ahmad Z. Hu Y. Wang e. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 University of Illinois at Chicago (UIC) Chicago Illinois USA Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA 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 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 Physic

events where the two leading jets are separated by a pseudorapidity interval devoid of particle activity, known as jet-gap-jet events, are studied in proton-proton collisions at s=13 TeV. The signature is expected from hard color-singlet exchange. each of the highest transverse momentum (pT) jets must have pTjet>40 GeV and pseudorapidity 1.4<|ηjet|<4.7, with ηjet1ηjet2<0, where jet1 and jet2 are the leading and sub.e.ding jets in pT, respectively. The analysis is based on data collected by the CMs and TOTeM experiments during a low luminosity, high-β* run at the CeRN LHC in 2015, with an integrated luminosity of 0.66 pb−1. events with a low number of charged particles with pT>0.2 GeV in the interval |η|<1 between the jets are ob.e.ved in excess of calculations that assume only color-exchange. The fraction of events produced via color-singlet exchange, fCse, is measured as a function of pTjet2, the pseudorapidity difference between the two leading jets, and the azimuthal angular separation between the two leading jets. The fraction fCse has values of 0.4–1.0%. The results are compared with previous measurements and with predictions from perturbative quantum chromodynamics. In addition, the first study of jet-gap-jet events detected in association with an intact proton using a subsample of events with an integrated luminosity of 0.40 pb−1 is presented. The intact protons are detected with the Roman pot detectors of the TOTeM experiment. The fCse in this sample is 2.91±0.70(stat)−1.01+1.08(syst) times larger than that for inclusive dijet production in dijets with similar kinematics.

关键词： Quark & gluon jets Hadron colliders

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Measurement of differential tt¯ production cross sections in the full kinematic range using lepton+jets events from proton-proton collisions at s=13 TeV

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Physical Review D 2021年第9期104卷 092013-092013页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee M. Dragicevic A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf T. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt M. Delcourt H. el Faham s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker L. Favart A. Grebenyuk A. K. Kalsi K. Lee M. Mahdavikhorrami I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach M. Niedziela C. Roskas A. samalan K. skovpen M. Tytgat b. Vermassen M. Vit A. bethani G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre K. Mondal J. Prisciandaro A. Taliercio M. Teklishyn T. T. Tran P. Vischia s. Wertz G. A. Alves C. Hensel A. Moraes 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 s. Fonseca De souza D. Matos Figueiredo C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima P. Rebello Teles 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 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 Q. Guo T. Javaid M. Mittal H. Wang L. Yuan M. Ahmad G. bauer C. Dozen Z. Hu J. Martins Y. Wang K. Yi e. Chapon G. M. Chen H. s. Chen M. Chen F. Iemmi A. Kapoor D. Leggat H. Lia Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 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 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 Universit

Measurements of differential and doub.e.differential cross sections of top-quark pair (tt¯) production are presented in the lepton+jets channels with a single electron or muon and jets in the final state. The analysis combines for the first time signatures of top quarks with low transverse momentum pT, where the top-quark decay products can be identified as separated jets and isolated leptons, and with high pT, where the decay products are collimated and overlap. The measurements are based on proton-proton collision data at s=13 TeV collected by the CMs experiment at the LHC, corresponding to an integrated luminosity of 137 fb−1. The cross sections are presented at the parton and particle levels, where the latter minimizes extrapolations based on theoretical assumptions. Most of the measured differential cross sections are well described by standard model predictions with the exception of some doub.e.differential distributions. The inclusive tt¯ production cross section is measured to be σtt¯=791±25 pb, which constitutes the most precise measurement in the lepton+jets channel to date.

关键词： Particle production Top quark Hadron colliders

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erratum to: search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te

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The european Physical Journal C 2021年第4期81卷 1-16页

作者： A. M. sirunyan A. Tumasyan W. Adam T. bergauer M. Dragicevic J. erö A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko T. Madlener I. Mikulec F. M. Pitters N. Rad J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko J. suarez Gonzalez M. R. Darwish e. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb sfar H. Van Haevermaet P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols s. s. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi s. Lowette I. Marchesini s. Moortgat A. Morton 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. Wezenb.e. 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. Wuyckens J. Zobec 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. Atanasov R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov M. bonchev A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov W. Fang Q. Guo H. Wang L. Yuan M. Ahmad Z. Hu Y. Wang e. Chapon G. M. Chen H. s. Chen M. Chen A. Kapoor D. Leggat H. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Vienna University of Technology Vienna Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Department of Basic and Applied Sciences Faculty of Engineering Arab Academy for Science Technology and Maritime Transport Alexandria Egypt Université Libre de Bruxelles Bruxelles Belgium Vrije Universiteit Brussel Brussel Belgium Ghent University Ghent Belgium IRFU CEA Université Paris-Saclay Gif-sur-Yvette France 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 de Campinas Campinas Brazil Federal University of Rio Grande do Sul Porto Alegre Brazil UFMS Nova Andradina Brazil Universidade Federal de Pelotas Pelotas 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 Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China University of Chinese Academy of Sciences Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China 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 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 Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘K

A Correction to this paper has b.e. published: https://***/10.1140/epjc/s10052-020-08739-5

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erratum to: search for phenomena beyond the standard Model in events with large b -jet multiplicity using the ATLAs detector at the LHC

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The european Physical Journal C 2021年第3期81卷 1-15页

作者： G. Aad b. Abbott D. C. Abbott A. Abed Abud K. Abeling D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya b. Achkar L. Adam C. Adam bourdarios L. Adamczyk L. Adamek J. Adelman M. Adersberger A. Adiguzel s. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-saavedra A. Ahmad F. Ahmadov W. s. Ahmed X. Ai G. Aielli s. Akatsuka M. Akbiyik T. P. A. Åkesson e. Akilli A. V. Akimov K. Al Khoury G. L. Alberghi J. Albert M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob b. Ali s. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio F. Alonso C. Alpigiani e. Alunno Camelia M. Alvarez estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.e. L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders s. Y. Andrean A. Andreazza V. Andrei C. R. Anelli 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 J. A. Aparisi Pozo M. A. Aparo L. Aperio bella N. Aranzabal V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce F. A. Arduh J.-F. Arguin s. Argyropoulos J.-H. Arling A. J. Armbruster A. Armstrong O. Arnaez H. Arnold Z. P. Arrubarrena Tame G. Artoni H. Asada K. Asai s. Asai T. Asawatavonvanich N. Asbah e. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani K. Augsten V. A. Austrup G. Avolio M. K. Ayoub G. Azuelos H. bachacou K. bachas F. backman P. bagnaia M. bahmani H. bahrasemani A. J. bailey V. R. bailey J.T. baines C. bakalis O. K. baker P. J. bakker e. bakos D. bakshi Gupta s. balaji R. balasubramanian e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas M. bandieramonte A. bandyopadhyay sw. banerjee L. barak W. M. barbe e. L. barberio D. barberis M. barbero G. barbour T. bar CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman USA Department of Physics University of Massachusetts Amherst USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham UK Department of Physics University of Toronto Toronto Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton UK 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 High Energy Physics Division Argonne National Laboratory Argonne USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King’s College London London UK Institut für Physik Universität Mainz Mainz Germany LAPP Université Grenoble Alpes Université Savoie Mont Blanc CNRS/IN2P3 Annecy France Faculty of Physics and Applied Computer Science AGH University of Science and Technology Krakow Poland Department of Physics Northern Illinois University DeKalb USA Fakultät für Physik Ludwig-Maximilians-Universität München Munich Germany Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Geneva Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot UK Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz USA IJCLab Université Paris-Saclay CNRS/IN2P3 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University Nijmegen/Nikhef Nijmegen The Netherlands Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Laboratóri

A Correction to this paper has b.e. published: https://***/10.1140/epjc/s10052-020-08730-0

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Measurement of the electroweak production of Zγ and two jets in proton-proton collisions at s=13 TeV and constraints on anomalous quartic gauge couplings

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Physical Review D 2021年第7期104卷 072001-072001页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee M. Dragicevic A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf T. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt M. Delcourt H. el Faham s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker L. Favart A. Grebenyuk A. K. Kalsi K. Lee M. Mahdavikhorrami I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach M. Niedziela C. Roskas A. samalan K. skovpen M. Tytgat W. Verbeke b. Vermassen M. Vit A. bethani G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre K. Mondal J. Prisciandaro A. Taliercio M. Teklishyn T. T. Tran P. Vischia s. Wertz G. A. Alves C. Hensel A. Moraes 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 s. Fonseca De souza D. Matos Figueiredo C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima P. Rebello Teles 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 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 Q. Guo T. Javaid M. Mittal H. Wang L. Yuan M. Ahmad G. bauer C. Dozen Z. Hu J. Martins Y. Wang K. Yi e. Chapon G. M. Chen H. s. Chen M. Chen F. Iemmi A. Kapoor D. Le Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 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) Fa

The first ob.e.vation of the electroweak (eW) production of a Z boson, a photon, and two forward jets (Zγjj) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. A data set corresponding to an integrated luminosity of 137 fb−1, collected by the CMs experiment at the LHC in 2016–2018 is used. The measured fiducial cross section for eW Zγjj is σeW=5.21±0.52(stat)±0.56(syst) fb=5.21±0.76 fb. single-differential cross sections in photon, leading lepton, and leading jet transverse momenta, and doub.e.differential cross sections in mjj and |Δηjj| are also measured. exclusion limits on anomalous quartic gauge couplings are derived at 95% confidence level in terms of the effective field theory operators M0 to M5, M7, T0 to T2, and T5 to T9.

关键词： Photons W & Z bosons Hadron colliders

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Iran in transition (vol 393, pg 1984, 2019)

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LANCeT 2019年第10186期393卷 2124-2124页

作者： Danaei, G. Farzadfar, F. Kelishadi, R. [a]Department of Global Health and Population and Department of Epidemiology Harvard T H Chan School of Public Health Boston MA USA Department of Global Health and Population and Department of Epidemiology Harvard T H Chan School of Public Health Boston MA USA [b]Scientific Association for Public Health in Iran Boston MA USA Scientific Association for Public Health in Iran Boston MA USA [c]Non-Communicable Diseases Research Center Endocrinology and Metabolism Population Sciences Institute Tehran University of Medical Sciences Tehran Iran Non-Communicable Diseases Research Center Endocrinology and Metabolism Population Sciences Institute Tehran University of Medical Sciences Tehran Iran [d]Endocrinology and Metabolism Research Center Tehran University of Medical Sciences Tehran Iran Endocrinology and Metabolism Research Center Tehran University of Medical Sciences Tehran Iran [e]Diabetes Research Center Tehran University of Medical Sciences Tehran Iran Diabetes Research Center Tehran University of Medical Sciences Tehran Iran [f]Endocrinology and Metabolism Clinical Sciences Institute Department of Health Management and Economics Tehran University of Medical Sciences Tehran Iran Endocrinology and Metabolism Clinical Sciences Institute Department of Health Management and Economics Tehran University of Medical Sciences Tehran Iran [g]Department of Global Health and Public Policy Tehran University of Medical Sciences Tehran Iran Department of Global Health and Public Policy Tehran University of Medical Sciences Tehran Iran [h]Department of Epidemiology and Biostatistics Tehran University of Medical Sciences Tehran Iran Department of Epidemiology and Biostatistics Tehran University of Medical Sciences Tehran Iran [i]School of Public Health Tehran University of Medical Sciences Tehran Iran School of Public Health Tehran University of Medical Sciences Tehran Iran [j]Faculty of Medicine Tehran University of Medical Sciences Tehran Iran Faculty of Medicine Te

summary being the second-largest country in the Middle east, Iran has a long history of civilisation during which several dynasties have b.e. overthrown and established and health-related structures have b.e. reorganised. Iran has had the replacement of traditional practices with modern medical treatments, emergence of multiple pioneer scientists and physicians with great contributions to the advancement of science, environmental and ecological changes in addition to large-scale natural disasters, epidemics of multiple communicab.e.diseases, and the shift towards non-communicab.e.diseases in recent decades. Given the lessons learnt from political instabilities in the past centuries and the approaches undertaken to overcome health challenges at the time, Iran has emerged as it is today. Iran is now a country with a population exceeding 80 million, mainly inhabiting urban regions, and has an increasing burden of non-communicab.e.diseases, including cardiovascular diseases, hypertension, diabetes, malignancies, mental disorders, substance abuse, and road injuries.

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search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at s=13 TeV

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Physical Review D 2021年第5期104卷 052011-052011页

作者： A. M. sirunyan 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 J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf X. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt J. De Clercq s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu 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 K. Lee I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur M. Gruchala I. Khvastunov G. Mestdach M. Niedziela C. Roskas K. skovpen M. Tytgat W. Verbeke b. Vermassen M. Vit A. bethani 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 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. Atanasov 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 M. Mittal 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-Wilsker J. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 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) Fa

A search is presented for long-lived particles produced in pairs in proton-proton collisions at the LHC operating at a center-of-mass energy of 13 TeV. The data were collected with the CMs detector during the period from 2015 through 2018, and correspond to a total integrated luminosity of 140 fb−1. This search targets pairs of long-lived particles with mean proper decay lengths between 0.1 and 100 mm, each of which decays into at least two quarks that hadronize to jets, resulting in a final state with two displaced vertices. No significant excess of events with two displaced vertices is ob.e.ved. In the context of R-parity violating supersymmetry models, the pair production of long-lived neutralinos, gluinos, and top squarks is excluded at 95% confidence level for cross sections larger than 0.08 fb, masses between 800 and 3000 GeV, and mean proper decay lengths between 1 and 25 mm.

关键词： Hypothetical particle physics models supersymmetric models Hadron colliders

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Measurements of jet ob.e.vab.e. sensitive to b-quark fragmentation in tt¯ events at the LHC with the ATLAs detector

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Physical Review D 2022年第3期106卷 032008-032008页

作者： G. Aad b. Abbott D. C. Abbott A. Abed Abud K. Abeling D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya b. Achkar L. Adam C. Adam bourdarios L. Adamczyk L. Adamek J. Adelman A. Adiguzel s. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-saavedra A. Ahmad F. Ahmadov W. s. Ahmed X. Ai G. Aielli s. Akatsuka M. Akbiyik T. P. A. Åkesson e. Akilli A. V. Akimov K. Al Khoury G. L. Alberghi J. Albert M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob b. Ali s. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allbrooke P. P. Allport A. Aloisio F. Alonso C. Alpigiani e. Alunno Camelia M. Alvarez estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.e. L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders s. Y. Andrean A. Andreazza V. Andrei C. R. Anelli 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 J. A. Aparisi Pozo M. A. Aparo L. Aperio bella N. Aranzabal V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce J-F. Arguin s. Argyropoulos J.-H. Arling A. J. Armbruster A. Armstrong O. Arnaez H. Arnold Z. P. Arrubarrena Tame G. Artoni H. Asada K. Asai s. Asai T. Asawatavonvanich N. A. Asbah e. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani P. A. Atmasiddha K. Augsten V. A. Austrup G. Avolio M. K. Ayoub G. Azuelos D. babal H. bachacou K. bachas F. backman P. bagnaia H. bahrasemani A. J. bailey V. R. bailey J. T. baines C. bakalis O. K. baker P. J. bakker e. bakos D. bakshi Gupta s. balaji R. balasubramanian e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas M. bandieramonte A. bandyopadhyay sw. banerjee L. barak W. M. barbe e. L. barberio D. barberis M. barbero G. barbour T. barillari M-s. barisits CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Physics Department Brookhaven National Laboratory Upton New York USA Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Univ. Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics University of Toronto Toronto Ontario Canada Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlands Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departa

several ob.e.vab.e. sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb−1 of s=13 TeV proton-proton collision data collected with the ATLAs detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic tt¯ events, and the associated set of charged-particle tracks is separated into those from the primary pp interaction vertex and those from the displaced b-decay secondary vertex. This division is used to construct ob.e.vab.e. that characterize the longitudinal and transverse momentum distributions of the b hadron within the jet. The measurements have b.e. corrected for detector effects and provide a test of heavy-quark-fragmentation modeling at the LHC in a system where the top-quark decay products are color connected to the proton beam remnants. The unfolded distributions are compared with the predictions of several modern Monte Carlo parton-shower generators and generator tunes, and a wide range of agreement with the data is ob.e.ved, with p values varying from 5×10−4 to 0.98. These measurements complement similar measurements from e+e− collider experiments in which the b quarks originate from a color singlet Z/γ*.

关键词： Quark & gluon jets Top quark Multi-purpose particle detectors Precision measurements

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search for long-lived particles using displaced jets in proton-proton collisions at s=13 TeV

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Physical Review D 2021年第1期104卷 012015-012015页

作者： A. M. sirunyan A. Tumasyan W. Adam F. Ambrogi T. bergauer M. Dragicevic J. erö A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko T. Madlener I. Mikulec F. M. Pitters N. Rad J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko J. suarez Gonzalez M. R. Darwish e. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb sfar H. Van Haevermaet P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols s. s. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi s. Lowette I. Marchesini s. Moortgat A. Morton 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. Wezenb.e. 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. Wuyckens J. Zobec G. A. Alves G. Correia silva 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 M. Melo De Almeida 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 e. J. Tonelli Manganote 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. Atanasov R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov M. bonchev A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov W. Fang Q. Guo H. Wang L. Yuan M. Ahmad Z. Hu Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 University of Virginia Charlottesville Virginia USA 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 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 Ener

An inclusive search is presented for long-lived particles using displaced jets. The search uses a data sample collected with the CMs detector at the CeRN LHC in 2017 and 2018, from proton-proton collisions at a center-of-mass energy of 13 TeV. The results of this search are combined with those of a previous search using a data sample collected with the CMs detector in 2016, yielding a total integrated luminosity of 132 fb−1. The analysis searches for the distinctive topology of displaced tracks and displaced vertices associated with a dijet system. For a simplified model, where pair-produced long-lived neutral particles decay into quark-antiquark pairs, pair production cross sections larger than 0.07 fb are excluded at 95% confidence level (C.L.) for long-lived particle masses larger than 500 GeV and mean proper decay lengths between 2 and 250 mm. For a model where the standard model-like Higgs boson decays to two long-lived scalar particles that each decays to a quark-antiquark pair, branching fractions larger than 1% are excluded at 95% C.L. for mean proper decay lengths between 1 mm and 340 mm. A group of supersymmetric models with pair-produced long-lived gluinos or top squarks decaying into various final-state topologies containing displaced jets is also tested. Gluino masses up to 2500 GeV and top squark masses up to 1600 GeV are excluded at 95% C.L. for mean proper decay lengths between 3 and 300 mm. The highest lower bounds on mass reach 2600 GeV for long-lived gluinos and 1800 GeV for long-lived top squarks. These are the most stringent limits to date on these models.

关键词： Quark & gluon jets Hypothetical particles Hadron colliders

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search for lepton-flavor violating decays of the Higgs boson in the μτ and eτ final states in proton-proton collisions at s=13 TeV

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Physical Review D 2021年第3期104卷 032013-032013页

作者： A. M. sirunyan A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee M. Dragicevic A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf X. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt J. De Clercq M. Delcourt H. el Faham s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker L. Favart A. Grebenyuk A. K. Kalsi K. Lee M. Mahdavikhorrami I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach M. Niedziela C. Roskas A. samalan K. skovpen T. T. Tran M. Tytgat W. Verbeke b. Vermassen M. Vit A. bethani G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel 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 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 s. Fonseca De souza D. Matos Figueiredo C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima P. Rebello Teles 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 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 T. Javaid M. Mittal H. Wang L. Yuan M. Ahmad G. bauer C. Dozen Z. Hu J. Martins Y. Wang K. Yi e. Chapon G. M. Chen H. s Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus 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 São Paulo Brazil 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 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) Fa

A search is presented for lepton-flavor violating decays of the Higgs boson to μτ and eτ. The dataset corresponds to an integrated luminosity of 137 fb−1 collected at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. No significant excess has b.e. found, and the results are interpreted in terms of upper limits on lepton-flavor violating branching fractions of the Higgs boson. The ob.e.ved (expected) upper limits on the branching fractions are, respectively, b(H→μτ)<0.15(0.15)% and b(H→eτ)<0.22(0.16)% at 95% confidence level.

关键词： Particle decays Higgs bosons Hadron colliders

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