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Measurement of inclusive and differential Higgs boson production cross sections in the diphoton decay channel in proton-proton collisions at √s = 13 TeV

arXiv

引用

arXiv 2018年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Mossolov, V. Suarez Gonzalez, J. De Wolf, E.A. D., Di Croce X., Janssen J., Lauwers M., Pieters M., Van De Klundert H., Van Haevermaet P., Van Mechelen N., Van Remortel S., Abu Zeid F., Blekman J., D'Hondt I., De Bruyn J., De Clercq K., Deroover G., Flouris D., Lontkovskyi S., Lowette I., Marchesini S., Moortgat L., Moreels q., python K., Skovpen S., Tavernier W., Van Doninck P., Van Mulders I., Van Parijs D., Beghin B., Bilin H., Brun B., Clerbaux G., De Lentdecker H., Delannoy B., Dorney G., Fasanella L., Favart R., Goldouzian A., Grebenyuk A.K., Kalsi T., Lenzi J., Luetic N., Postiau E., Starling L., Thomas C., Vander Velde P., Vanlaer D., Vannerom q., Wang T., Cornelis D., Dobur A., Fagot M., Gul I., Khvastunov D., Poyraz C., Roskas D., Trocino M., Tytgat W., Verbeke B., Vermassen M., Vit N., Zaganidis H., Bakhshiansohi O., Bondu S., Brochet G., Bruno C., Caputo P., David C., Delaere M., Delcourt B., Francois A., Giammanco G., Krintiras V., Lemaitre A., Magitteri A., Mertens M., Musich K., Piotrzkowski A., Saggio M., Vidal Marono S., Wertz J., Zobec F.L., Alves G.A., Alves L., Brito G., Correia Silva C., Hensel A., Moraes M.E., Pol P., Rebello Teles E., Belchior Batista Das Chagas W., Carvalho J., Chinellato E., Coelho E.M., Da Costa G.G., Da Silveira D., De Jesus Damiao C., De Oliveira Martins S., Fonseca De Souza H., Malbouisson D., Matos Figueiredo M., Melo De Almeida C., Mora Herrera L., Mundim H., Nogima W.L., Prado Da Silva L.J., Sanchez Rosas A., Santoro A., Sznajder M., Thiel E.J., Tonelli Manganote F., Torres Da Silva De Araujo A., Vilela Pereira S., Ahuja C.A., Bernardes L., Calli 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Universidad de Los Andes Bogota 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Centre de Calcul de l'Institut National de Physique Nucl

Measurements of the inclusive and differential production cross sections for the Higgs boson in the diphoton decay channel are performed using the data set of proton-proton collisions at √s = 13 TeV collected by the CMS experiment at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. The cross sections are measured in a fiducial phase space defined by a set of requirements on the isolation and kinematic variables of the photons. Differential cross sections are measured as functions of the kinematic properties of the diphoton system and the event. A subset of the measurements is performed in regions of the fiducial phase space, where relative contributions of specific Higgs boson production mechanisms are enhanced. The total cross section in the chosen fiducial phase space is measured to be 84 ± 11 (stat) ± 7 (syst) fb = 84 ± 13 fb, to be compared with a theoretical prediction of 73 ± 4 fb. All measurements are found to be in agreement with the theoretical predictions for the standard model Higgs boson with a mass of 125.09 GeV within the experimental and theoretical uncertainties. Copyright © 2018, The Authors. All rights reserved.

关键词： Bosons

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Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV

arXiv

引用

arXiv 2020年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Ero, J. Escalante Del Valle, A. Flechl, M. Fruhwirth, R. Jeitler, M. Krammer, N. Kratschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Schieck, J. Schofbeck, R. Spanring, M. Waltenberger, W. Wulz, C.-E. Zarucki, M. Drugakov, V. Mossolov, V. Suarez Gonzalez, J. Darwish, M.R. De Wolf, E.A. Di Croce, D. Janssen, X. Lelek, A. Pieters, M. Rejeb Sfar, H. Van Haevermaet, H. Van Mechelen, P. Van Putte, S. Van Remortel, N. Blekman, F. Bols, E.S. Chhibra, S.S. D'Hondt, J. De Clercq, J. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. python, q. Tavernier, S. Van Doninck, W. Van Mulders, P. Beghin, D. Bilin, B. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Favart, L. Grebenyuk, A. Kalsi, A.K. Moureaux, L. Popov, A. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Cornelis, T. Dobur, D. Khvastunov, I. Niedziela, M. Roskas, C. Skovpen, K. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Bondu, O. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Giammanco, A. Lemaitre, V. Prisciandaro, J. Saggio, A. Vidal Marono, M. Vischia, P. Zobec, J. Alves, G.A. Correia Silva, G. Hensel, C. Moraes, A. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Martins, J. Matos Figueiredo, D. Medina Jaime, M. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Rebello Teles, P. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Fang, W. Gao, X. Yuan, L. Ahmad, M. Hu, Z. Wang, Y. Chen, G.M. Chen, H.S. Chen, M. Jiang, C.H. Leggat, D. Liao, H. Liu, Z. Spiezia, A. Tao, J. Yazgan, E. Zhang, H. Zhang, S. Zhao, J. Agapitos, A. Ban, Y. Chen, G. Levin, A. Li, J. Li, L. Li, q. Mao, Y. qian, S.J. Wang, D. Wang, q. Besancon, M. Couderc, F. Dejardin, M. Denegri, D. Fabbro, B. 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 Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Irfu Cea Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Université de Strasbourg Cnrs Iphc Umr 7178 Strasbourg France Deutsches Elektronen-Synchrotron Hamburg Germany University of Hamburg Hamburg Germany Karlsruher Institut fuer Technologie Karlsruhe Germany P.N. Lebedev Physical Institute Moscow Russia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia Novosibirsk Russia Institute for High Energy Physics of National Research Centre Kurchatov Institute Protvino Russia National Research Tomsk Polytechnic University Tomsk Russia Tomsk State University Tomsk Russia University of Belgrade Faculty of Physics Vinca Institute of Nuclear Sciences Cern European Organization for Nuclear Research Geneva Switzerland Paul Scherrer Institut Villigen Switzerland Zurich Switzerland Rutherford Appleton Laboratory Didcot United Kingdom Imperial College London United Kingdom Brown University Providence United States University of California Davis Davis United States University of California Los Angeles United States University of California Riverside Riverside United States University of California San Diego San Diego United States

The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions in √sNN= 5.02 TeV lead-lead (PbPb) and proton-proton (pp) collisions recorded with the CMS detector at the LHC. These data correspond to integrated luminosities of 404 μb-1and 27.4 pb-1for PbPb and pp collisions, respectively. Leveraging the sensitivity of the jet charge to fundamental differences in the electric charges of quarks and gluons, the jet charge distributions from simulated events are used as templates to extract the quark- and gluon-like jet fractions from data. The modification of these jet fractions is examined by comparing pp and PbPb data as a function of the overlap of the colliding Pb nuclei (centrality). This measurement tests the color charge dependence of jet energy loss due to interactions with the quark-gluon plasma. No significant modification between different centrality classes and with respect to pp results is observed in the extracted fractions of quark- and gluon-like jet fractions. Copyright © 2020, The Authors. All rights reserved.

关键词： Elementary particles

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Search for supersymmetry with a compressed mass spectrum in events with a soft τ lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions at √s = 13 TeV

arXiv

引用

arXiv 2019年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Brandstetter, J. Dragicevic, M. Ero, J. Escalante Del Valle, A. Flechl, M. Fruhwirth, R. Jeitler, M. Krammer, N. Kratschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Schieck, J. Schofbeck, R. Spanring, M. Spitzbart, D. Waltenberger, W. Wulz, C.-E. Zarucki, M. Drugakov, V. Mossolov, V. Suarez Gonzalez, J. Darwish, M.R. De Wolf, E.A. Di Croce, D. Janssen, X. Lelek, A. Pieters, M. Rejeb Sfar, H. Van Haevermaet, H. Van Mechelen, P. Van Putte, S. Van Remortel, N. Blekman, F. Bols, E.S. Chhibra, S.S. D'Hondt, J. De Clercq, J. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. python, q. Skovpen, K. Tavernier, S. Van Doninck, W. Van Mulders, P. Beghin, D. Bilin, B. Brun, H. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Favart, L. Grebenyuk, A. Kalsi, A.K. Popov, A. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Cornelis, T. Dobur, D. Khvastunov, I. Niedziela, M. Roskas, C. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Bondu, O. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Giammanco, A. Lemaitre, V. Prisciandaro, J. Saggio, A. Vidal Marono, M. Vischia, P. Zobec, J. Alves, F.L. Alves, G.A. Correia Silva, G. Hensel, C. Moraes, A. Rebello Teles, P. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Huertas Guativa, L.M. Malbouisson, H. Martins, J. Matos Figueiredo, D. Medina Jaime, M. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Chen, G.M. Chen, H.S. Chen, M. Jiang, C.H. Leggat, D. Liao, H. Liu, Z. Spiezia, A. Tao, J. Yazgan, E. Zhang, H. Zhang, S. Zhao, J. Agapitos, A. Ban, Y. Chen, G. Levin, A. Li, J. Li, L. Li, q. Mao, Y. qian, S.J. Wang, D. Wang, q. Ahmad, M. Hu, Z. Wang, Y. Xiao, M. Avila, C. Cabrera, A. Florez, C. 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg Cnrs Iphc Umr 7178 Strasbourg France Deutsches Elektronen-Synchrotron Hamburg Germany University of Hamburg Hamburg Germany Karlsruher Institut fuer Technologie Karlsruhe Germany Madrid Spain Cern European Organization for Nuclear Research Geneva Switzerland Paul Scherrer Institut Villigen Switzerland Zurich Switzerland Universität Zürich Zurich Switzerland Brown University Providence United States University of California Davis Davis United States University of California Los Angeles United States University of California Riverside Riverside United States University of Florida Gainesville United States Texas Tech University Lubbock United States Vanderbilt University Nashville United States University of Virginia Charlottesville United States Wayne State University Detroit United States University of Wisconsin - Madison MadisonWI United States

The first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying τ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. These event signatures are consistent with direct or indirect production of scalar τ leptons (τ) in supersymmetric models that exhibit coannihilation between the τ and the lightest neutralino (Χ01), and that could generate the observed relic density of dark matter. The data correspond to an integrated luminosity of 77.2 fb-1of proton-proton collisions at √s = 13 TeV collected with the CMS detector at the LHC in 2016 and 2017. The results are interpreted in a supersymmetric scenario with a small mass difference (Δm) between the chargino (Χ±1) or next-to-lightest neutralino (Χ02), and the Χ01. The mass of the τ is assumed to be the average of the Χ±1and Χ01masses. The data are consistent with standard model background predictions. Upper limits at 95% confidence level are set on the sum of the Χ±1, Χ02, and Τ production cross sections for Δm(Χ±1, Χ01) = 50 GeV, resulting in a lower limit of 290 GeV on the mass of the Χ±1, which is the most stringent to date and surpasses the bounds from the LEP experiments. Copyright © 2019, The Authors. All rights reserved.

关键词： Mass spectrometry

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Measurements of ttH production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel

arXiv

引用

arXiv 2020年

作者： Sirunyany, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Del Valle, A. Escalante Flechl, M. Uhwirth, R.F. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Schieck, J. Schöfbeck, R. Spanring, M. Waltenberger, W. Wulz, C.-E. Zarucki, M. Drugakov, V. Mossolov, V. Gonzalez, J. Suarez Darwish, M.R. De Wolf, E.A. Di Croce, D. Janssen, X. Kello, T. Lelek, A. Pieters, M. Sfar, H. Rejeb Van Haevermaet, H.V. Van Mechelen, P. Van Putte, S. Van Remortel, N. Abu Zeid, S.A. Blekman, F. Bols, E.S. Chhibra, S.S. D'Hondt, J. Clercq, J. De Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. python, q. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Clerbaux, B. Lentdecker, G. De Delannoy, H. Dorney, B. Favart, L. Kalsi, A.K. Moureaux, L. Popov, A. Postiau, N. Starling, E. Thomas, L. Velde, C. Vander Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Khvastunov, I. Niedziela, M. Roskas, C. Skovpen, K. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Giammanco, A. Lemaitre, V. Prisciandaro, J. Saggio, A. Vischia, P. Zobec, J. Alves, G.A. Silva, G. Correia Hensel, C. Moraes, A. Chagas, E. Belchior Batista Das Carvalho, W. Chinellato, J. Coelho, E. Costa, E.M. Da Silveira, G.G. Da Damiao, D. De Jesus Martins, C. De Oliveira Souza, S. Fonseca De Malbouisson, H. Martins, J. Figueiredo, D. Matos Jaime, M. Medina Almeida, M. Melo De Herrera, C. Mora Mundim, L. Nogima, H. Silva, W.L. Prado Da Teles, P. Rebello Rosas, L.J. Sanchez Santoro, A. Sznajder, A. Thiel, M. Manganote, E.J. Tonelli Araujo, F. Torres Da Silva De Pereira, A. Vilela Bernardesa, C.A. Calligarisa, L. Tomeia, T.R. Fernandez Perez Gregoresb, E.M. Lemos, D.S. Mercadanteb, P.G. Novaesa, S.F. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. Yerevan Physics Institute Yerevan Armenia Institut F Ur 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 Saõ Paulo Brazil Universidade Federal do ABC Saõ 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 State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia Faculty of Electrical Engineering University of Split Mechanical Engineering and Naval Architecture Split Croatia Faculty of Science University of Split 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 Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Institut Polytechnique de Paris CNRS/IN2P3 Ecole Polytechnique Université de Strasbourg CNRS IPHC UM

The first observation of thett H process in a single Higgs boson decay channel with the full reconstruction of the final state (H→γγ) is presented, with a significance of 6.6 standard deviations (σ). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2σ. The measurements are based on a sample of proton-proton collisions at a center-of-mass energys√=13 TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb-1. The cross section times branching fraction of thett H process is measured to beσtt HBγγ=1.56+0.34-0.32fb, which is compatible with the standard model prediction of 1.13+0.08-0.11fb. The fractional contribution of the CP-odd component is measured to befHttCP=0.00±0.33. Copyright © 2020, The Authors. All rights reserved.

关键词： Bosons

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Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at √s = 13 TeV†

arXiv

引用

arXiv 2018年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Mossolov, V. Suarez Gonzalez, J. De Wolf, E.A. Di Croce, D. Janssen, X. Lauwers, J. Pieters, M. Van De Klundert, M. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Abu Zeid, S. Blekman, F. D'Hondt, J. De Bruyn, I. De Clercq, J. Deroover, K. Flouris, G. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. Moreels, L. python, q. Skovpen, K. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Brun, H. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Fasanella, G. Favart, L. Goldouzian, R. Grebenyuk, A. Kalsi, A.K. Lenzi, T. Luetic, J. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Fagot, A. Gul, M. Khvastunov, I. Poyraz, D. Roskas, C. Trocino, D. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Zaganidis, N. Bakhshiansohi, H. Bondu, O. Brochet, S. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Francois, B. Giammanco, A. Krintiras, G. Lemaitre, V. Magitteri, A. Mertens, A. Musich, M. Piotrzkowski, K. Saggio, A. Vidal Marono, M. Wertz, S. Zobec, J. Alves, F.L. Alves, G.A. Brito, L. Correia Silva, G. Hensel, C. Moraes, A. Pol, M.E. Rebello Teles, P. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Matos Figueiredo, D. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Ahuja, S. Bernardes, C.A. Calligari 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Universidad de Los Andes Bogota 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Centre de Calcul de l'Institut National de Physique Nucl

A search in energetic, high-multiplicity final states for evidence of physics beyond the standard model, such as black holes, string balls, and electroweak sphalerons, is presented. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected with the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV in 2016. Standard model backgrounds, dominated by multijet production, are determined from control regions in data without any reliance on simulation. No evidence for excesses above the predicted background is observed. Model-independent 95% confidence level upper limits on the cross section of beyond the standard model signals in these final states are set and further interpreted in terms of limits on semiclassical black hole, string ball, and sphaleron production. In the context of models with large extra dimensions, semiclassical black holes with minimum masses as high as 10.1 TeV and string balls with masses as high as 9.5 TeV are excluded by this search. Results of the first dedicated search for electroweak sphalerons are presented. An upper limit of 0.021 is set at 95% confidence level on the fraction of all quark-quark interactions above the nominal threshold energy of 9 TeV resulting in the sphaleron transition. Copyright © 2018, The Authors. All rights reserved.

关键词： Stars

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Observation of tW production in the single-lepton channel in pp collisions at √s = 13 TeV

arXiv

引用

arXiv 2021年

作者： Tumasyan, A. Sirunyan, A.M. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Mossolov, V. Suarez Gonzalez, J. De Wolf, E.A. Di Croce, D. Janssen, X. Lauwers, J. Pieters, M. Van De Klundert, M. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Abu Zeid, S. Blekman, F. D'Hondt, J. De Bruyn, I. De Clercq, J. Deroover, K. Flouris, G. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. Moreels, L. python, q. Skovpen, K. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Brun, H. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Fasanella, G. Favart, L. Goldouzian, R. Grebenyuk, A. Kalsi, A.K. Lenzi, T. Luetic, J. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Fagot, A. Gul, M. Khvastunov, I. Poyraz, D. Roskas, C. Trocino, D. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Zaganidis, N. Bakhshiansohi, H. Bondu, O. Brochet, S. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Francois, B. Giammanco, A. Krintiras, G. Lemaitre, V. Magitteri, A. Mertens, A. Musich, M. Piotrzkowski, K. Saggio, A. Vidal Marono, M. Wertz, S. Zobec, J. Alves, F.L. Alves, G.A. Brito, L. Correia Silva, G. Hensel, C. Moraes, A. Pol, M.E. Rebello Teles, P. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Matos Figueiredo, D. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Ahuja, S. Bernardes, C.A. Calligari 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Universidad de Los Andes Bogota 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Centre de Calcul de l'Institut National de Physique Nucl

A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at √s = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb-1collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant tt background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 ± 4 (stat) ± 12 (syst) pb, consistent with the standard model. © 2021, CC BY.

关键词： Charged particles

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Studies of B-s2(5840)0and Bs1(5830)0mesons including the observation of the B*s2(5840)0→ B0K0S decay in proton-proton collisions at s√= 8 TeV

arXiv

引用

arXiv 2018年

作者： Sirunyany, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Del Valle, A. Escalante Flechl, M. Uhwirth, R.F. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Schieck, J. Schöfbeck, R. Spanring, M. Waltenberger, W. Wulz, C.-E. Zarucki, M. Drugakov, V. Mossolov, V. Gonzalez, J. Suarez Darwish, M.R. De Wolf, E.A. Di Croce, D. Janssen, X. Kello, T. Lelek, A. Pieters, M. Sfar, H. Rejeb Van Haevermaet, H.V. Van Mechelen, P. Van Putte, S. Van Remortel, N. Abu Zeid, S.A. Blekman, F. Bols, E.S. Chhibra, S.S. D'Hondt, J. De Clercq, J. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. python, q. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Clerbaux, B. Lentdecker, G. De Delannoy, H. Dorney, B. Favart, L. Kalsi, A.K. Moureaux, L. Popov, A. Postiau, N. Starling, E. Thomas, L. Velde, C. Vander Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Khvastunov, I. Niedziela, M. Roskas, C. Skovpen, K. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Giammanco, A. Lemaitre, V. Prisciandaro, J. Saggio, A. Vischia, P. Zobec, J. Alves, G.A. Silva, G. Correia Hensel, C. Moraes, A. Chagas, E. Belchior Batista Das Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. De Souza, S. Fonseca Malbouisson, H. Martins, J. Figueiredo, D. Matos Jaime, M. Medina De Almeida, M. Melo Herrera, C. Mora Mundim, L. Nogima, H. Da Silva, W.L. Prado Teles, P. Rebello Rosas, L.J. Sanchez Santoro, A. Sznajder, A. Thiel, M. Manganote, E.J. Tonelli Da Silva De Araujo, F. Torres Pereira, A. Vilela Ahuja, S. Bernardesa, C.A. Calligarisa, L. Tomeia, T.R. Fernandez Perez Gregoresb, E.M. Lemos, D.S. Mercadanteb, P.G. Novaesa, S.F. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. Shopova, M. Sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, B. Petkov, P. Petrov, A. Fang, W. Gao, X. Yuan, L. Ahmad, M. Bi Yerevan Physics Institute Yerevan Armenia Institut F Ur Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium UniversiteÂ Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium UniversiteÂ 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 SaËœo Paulo Brazil Universidade Federal Do Abc SaËœo Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China Kyungpook National University Daegu Daegu Korea Republic of Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split Split Croatia Faculty of Science University of Split Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Tsinghua University Beijing China Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU Cea UniversiteÂ Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Institut Polytechnique de Paris CNRS/IN2P3 Ecole Polytechnique UniversiteÂ de Strasbourg CNRS Iph

Measurements of B-s2(5840)0and Bs1(5830)0mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.6 fb-1, collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV. The analysis studies P-wave B0S meson decays into B()+K-A nd B()0K0S, where the B+ and B0 mesons are identified using the decays B+→J/ψK+ and B0→J/ψK(892)0. The masses of the P-wave B0S meson states are measured and the natural width of the B-s2(5840)0state is determined. The first measurement of the mass difference between the charged and neutral B mesons is also presented. The B-s2(5840)0decay to B0K0S is observed, together with a measurement of its branching fraction relative to the B-s2(5840)0→B+K-decay. Copyright © 2018, The Authors. All rights reserved.

关键词： Hadrons

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Study of azimuthal anisotropy of Υ(1S) mesons in pPb collisions at √sNN = 8.16 TeV

arXiv

引用

arXiv 2023年

作者： Tumasyan, A. Adam, W. Bergauer, T. Dragicevic, M. Del Valle, A. Escalante Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Pitters, F.M. Rad, N. Schieck, J. Schöfbeck, R. Spanring, M. Templ, S. Waltenberger, W. Wulz, C.-E. Zarucki, M. Darwish, M.R. De Wolf, E.A. Janssen, T. Kello, T. Lelek, A. Pieters, M. Sfar, H. Rejeb Van Mechelen, P. Van Putte, S. Van Remortel, N. Blekman, F. Bols, E.S. Chhibra, S.S. D’Hondt, J. De Clercq, J. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. Morton, A. Müller, D. python, q. Tavernier, S. Van Doninck, W. Van Mulders, P. Beghin, D. Bilin, B. Clerbaux, B. De Lentdecker, G. Dorney, B. Favart, L. Grebenyuk, A. Kalsi, A.K. Makarenko, I. Moureaux, L. Pétré, L. Popov, A. Postiau, N. Starling, E. Thomas, L. Velde, C. Vander Vanlaer, P. Vannerom, D. Wezenbeek, L. Cornelis, T. Dobur, D. Gruchala, M. Khvastunov, I. Mestdach, G. Niedziela, M. Roskas, C. Skovpen, K. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Bethani, A. Bruno, G. Bury, F. Caputo, C. David, P. Delaere, C. Delcourt, M. Donertas, I.S. Giammanco, A. Lemaitre, V. Mondal, K. Prisciandaro, J. Taliercio, A. Teklishyn, M. Vischia, P. Wertz, S. Wuyckens, S. Alves, G.A. Hensel, C. Moraes, A. Júnior, W.L. Aldá Das Chagas, E. Belchior Batista Malbouisson, H. Brandao Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Souza, S. Fonseca Martins, J. Figueiredo, D. Matos Jaime, M. Medina Herrera, C. Mora Mundim, L. Nogima, H. Teles, P. Rebello Rosas, L.J. Sanchez Santoro, A. Do Amaral, S.M. Silva Sznajder, A. Thiel, M. Da Silva De Araujo, F. Torres Pereira, A. Vilela Bernardes, C.A. Calligaris, L. Tomei, T.R. Fernandez Perez Gregores, E.M. Lemos, D.S. Mercadante, P.G. Novaes, S.F. Padula, Sandra S. Aleksandrov, A. Antchev, G. Atanassov, I. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. Shopova, M. Sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, B. Petkov, P. Petrov, A. Cheng, T. Fang, W. Guo, q. Mittal, M. Wang, H. Yuan, L. Ahmad, M. Bauer, G. Hu, Z. 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 Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China Fudan University Shanghai China Zhejiang University Zhejiang 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 Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta-Lahti University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet CNRS IN2P3 Ecole Polytechnique

The azimuthal anisotropy of Υ(1S) mesons in high-multiplicity proton-lead collisions is studied using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 8.16 TeV. The Υ(1S) mesons are reconstructed using their dimuon decay channel. The anisotropy is characterized by the second Fourier harmonic coefficients, found using a two-particle correlation technique, in which the Υ(1S) mesons are correlated with charged hadrons. A large pseudorapidity gap is used to suppress short-range correlations. Nonflow contamination from the dijet background is removed using a low-multiplicity subtraction method, and the results are presented as a function of Υ(1S) transverse momentum. The azimuthal anisotropies are smaller than those found for charmonia in proton-lead collisions at the same collision energy, but are consistent with values found for Υ(1S) mesons in lead-lead interactions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. © 2023, CC BY.

关键词： Bosons

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Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at √s = 13 TeV

arXiv

引用

arXiv 2018年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Mossolov, V. Suarez Gonzalez, J. De Wolf, E.A. Di Croce, D. Janssen, X. Lauwers, J. Pieters, M. Van De Klundert, M. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Abu Zeid, S. Blekman, F. D'Hondt, J. De Bruyn, I. De Clercq, J. Deroover, K. Flouris, G. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. Moreels, L. python, q. Skovpen, K. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Brun, H. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Fasanella, G. Favart, L. Goldouzian, R. Grebenyuk, A. Kalsi, A.K. Lenzi, T. Luetic, J. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Fagot, A. Gul, M. Khvastunov, I. Poyraz, D. Roskas, C. Trocino, D. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Zaganidis, N. Bakhshiansohi, H. Bondu, O. Brochet, S. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Francois, B. Giammanco, A. Krintiras, G. Lemaitre, V. Magitteri, A. Mertens, A. Musich, M. Piotrzkowski, K. Saggio, A. Vidal Marono, M. Wertz, S. Zobec, J. Alves, F.L. Alves, G.A. Brito, L. Correia Silva, G. Hensel, C. Moraes, A. Pol, M.E. Rebello Teles, P. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Matos Figueiredo, D. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Ahuja, S. Bernardes, C.A. Calligari 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Universidad de Los Andes Bogota 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Centre de Calcul de l'Institut National de Physique Nucl

The results of a previous search by the CMS Collaboration for squarks and gluinos are reinterpreted to constrain models of leptoquark (Lq) production. The search considers jets in association with a transverse momentum imbalance, using the MT2 variable. The analysis uses proton-proton collision data at √s = 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. Leptoquark pair production is considered with Lq decays to a neutrino and a top, bottom, or light quark. This reinterpretation considers higher mass values than the original CMS search to constrain both scalar and vector Lqs. Limits on the cross section for Lq pair production are derived at the 95% confidence level depending on the Lq decay mode. A vector Lq decaying with a 50% branching fraction to tν, and 50% to bτ, has been proposed as part of an explanation of anomalous flavor physics results. In such a model, using only the decays to tν, Lq masses below 1530 GeV are excluded assuming the Yang–Mills case with coupling κ = 1, or 1115 GeV in the minimal coupling case κ = 0, placing the most stringent constraint to date from pair production of vector Lqs. Copyright © 2018, The Authors. All rights reserved.

关键词： Vectors

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Search for the decay of a Higgs boson in the ``γ channel in proton-proton collisions at √s = 13 TeV

arXiv

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arXiv 2018年

作者： Sirunyan, A.M. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Brondolin, E. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Ghete, V.M. Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Rad, N. Rohringer, H. Schieck, J. Schöfbeck, R. Spanring, M. Spitzbart, D. Taurok, A. Waltenberger, W. Wittmann, J. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Mossolov, V. Suarez Gonzalez, J. De Wolf, E.A. Di Croce, D. Janssen, X. Lauwers, J. Pieters, M. Van De Klundert, M. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Abu Zeid, S. Blekman, F. D'Hondt, J. De Bruyn, I. De Clercq, J. Deroover, K. Flouris, G. Lontkovskyi, D. Lowette, S. Marchesini, I. Moortgat, S. Moreels, L. python, q. Skovpen, K. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Parijs, I. Beghin, D. Bilin, B. Brun, H. Clerbaux, B. De Lentdecker, G. Delannoy, H. Dorney, B. Fasanella, G. Favart, L. Goldouzian, R. Grebenyuk, A. Kalsi, A.K. Lenzi, T. Luetic, J. Postiau, N. Starling, E. Thomas, L. Vander Velde, C. Vanlaer, P. Vannerom, D. Wang, q. Cornelis, T. Dobur, D. Fagot, A. Gul, M. Khvastunov, I. Poyraz, D. Roskas, C. Trocino, D. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. Zaganidis, N. Bakhshiansohi, H. Bondu, O. Brochet, S. Bruno, G. Caputo, C. David, P. Delaere, C. Delcourt, M. Francois, B. Giammanco, A. Krintiras, G. Lemaitre, V. Magitteri, A. Mertens, A. Musich, M. Piotrzkowski, K. Saggio, A. Vidal Marono, M. Wertz, S. Zobec, J. Alves, F.L. Alves, G.A. Brito, L. Correia Silva, G. Hensel, C. Moraes, A. Pol, M.E. Rebello Teles, P. Belchior Batista Das Chagas, E. Carvalho, W. Chinellato, J. Coelho, E. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Matos Figueiredo, D. Melo De Almeida, M. Mora Herrera, C. Mundim, L. Nogima, H. Prado Da Silva, W.L. Sanchez Rosas, L.J. Santoro, A. Sznajder, A. Thiel, M. Tonelli Manganote, E.J. Torres Da Silva De Araujo, F. Vilela Pereira, A. Ahuja, S. Bernardes, C.A. Calligari 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 Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Tsinghua University Beijing China Universidad de Los Andes Bogota 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole polytechnique CNRS/IN2P3 Université Paris-Saclay Palaiseau France Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Centre de Calcul de l'Institut National de Physique Nucl

A search for a Higgs boson decaying into a pair of electrons or muons and a photon is described. Higgs boson decays to a Z boson and a photon (H → Zγ → ``γ,` = e or µ), or to two photons, one of which has an internal conversion into a muon pair (H → γ∗γ → µµγ) were considered. The analysis is performed using a data set recorded by the CMS experiment at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. No significant excess above the background prediction has been found. Limits are set on the cross section for a standard model Higgs boson decaying to opposite-sign electron or muon pairs and a photon. The observed limits on cross section times the corresponding branching fractions vary between 1.4 and 4.0 (6.1 and 11.4) times the standard model cross section for H → γ∗γ → µµγ (H → Zγ → ``γ) in the 120–130 GeV mass range of the ``γ system. The H → γ∗γ → µµγ and H → Zγ → ``γ analyses are combined for mH = 125 GeV, obtaining an observed (expected) 95% confidence level upper limit of 3.9 (2.0) times the standard model cross section. Copyright © 2018, The Authors. All rights reserved.

关键词： Photons

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