Search for ZZ and ZH production in the bb¯bb¯ final state using proton-proton collisions at s=13TeV

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作者
Hayrapetyan, A. [1 ]
Tumasyan, A. [1 ,189 ]
Adam, W. [2 ]
Andrejkovic, J.W. [2 ]
Bergauer, T. [2 ]
Chatterjee, S. [2 ]
Damanakis, K. [2 ]
Dragicevic, M. [2 ]
Hussain, P.S. [2 ]
Jeitler, M. [2 ,190 ]
Krammer, N. [2 ]
Li, A. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Schieck, J. [2 ,190 ]
Schöfbeck, R. [2 ]
Schwarz, D. [2 ]
Sonawane, M. [2 ]
Templ, S. [2 ]
Waltenberger, W. [2 ]
Wulz, C.-E. [2 ,190 ]
Darwish, M.R. [3 ,191 ]
Janssen, T. [3 ]
Van Mechelen, P. [3 ]
Bols, E.S. [4 ]
D’Hondt, J. [4 ]
Dansana, S. [4 ]
De Moor, A. [4 ]
Delcourt, M. [4 ]
Lowette, S. [4 ]
Makarenko, I. [4 ]
Müller, D. [4 ]
Tavernier, S. [4 ]
Tytgat, M. [4 ,6 ]
Van Onsem, G.P. [4 ]
Van Putte, S. [4 ]
Vannerom, D. [4 ]
Clerbaux, B. [5 ]
Das, A.K. [5 ]
De Lentdecker, G. [5 ]
Evard, H. [5 ]
Favart, L. [5 ]
Gianneios, P. [5 ]
Hohov, D. [5 ]
Jaramillo, J. [5 ]
Khalilzadeh, A. [5 ]
Khan, F.A. [5 ]
Lee, K. [5 ]
Mahdavikhorrami, M. [5 ]
Malara, A. [5 ]
机构
[1] Yerevan Physics Institute, Yerevan, Armenia
[2] Institut für Hochenergiephysik, Vienna, Austria
[3] Universiteit Antwerpen, Antwerp, Belgium
[4] Vrije Universiteit Brussel, Brussel, Belgium
[5] Université Libre de Bruxelles, Brussels, Belgium
[6] Ghent University, Ghent, Belgium
[7] Université Catholique de Louvain, Louvain-la-Neuve, Belgium
[8] Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
[9] Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
[10] Universidade Estadual Paulista, Universidade Federal do ABC, São Paulo, Brazil
[11] Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
[12] University of Sofia, Sofia, Bulgaria
[13] Instituto De Alta Investigación, Universidad de Tarapacá, Casilla 7 D, Arica, Chile
[14] Beihang University, Beijing, China
[15] Department of Physics, Tsinghua University, Beijing, China
[16] Institute of High Energy Physics, Beijing, China
[17] State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
[18] Sun Yat-Sen University, Guangzhou, China
[19] University of Science and Technology of China, Hefei, China
[20] Nanjing Normal University, Nanjing, China
[21] Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai, China
[22] Zhejiang University, Zhejiang, Hangzhou, China
[23] Universidad de Los Andes, Bogota, Colombia
[24] Universidad de Antioquia, Medellin, Colombia
[25] University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
[26] University of Split, Faculty of Science, Split, Croatia
[27] Institute Rudjer Boskovic, Zagreb, Croatia
[28] University of Cyprus, Nicosia, Cyprus
[29] Charles University, Prague, Czech Republic
[30] Escuela Politecnica Nacional, Quito, Ecuador
[31] Universidad San Francisco de Quito, Quito, Ecuador
[32] Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
[33] Center for High Energy Physics (CHEP-FU), Fayoum University, El-Fayoum, Egypt
[34] National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
[35] Department of Physics, University of Helsinki, Helsinki, Finland
[36] Helsinki Institute of Physics, Helsinki, Finland
[37] Lappeenranta-Lahti University of Technology, Lappeenranta, Finland
[38] IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
[39] Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
[40] Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
[41] Institut de Physique des 2 Infinis de Lyon (IP2I), Villeurbanne, France
[42] Georgian Technical University, Tbilisi, Georgia
[43] I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
[44] III. Physikalisches Institut A, RWTH Aachen University, Aachen, Germany
[45] III. Physikalisches Institut B, RWTH Aachen University, Aachen, Germany
[46] Deutsches Elektronen-Synchrotron, Hamburg, Germany
[47] University of Hamburg, Hamburg, Germany
[48] Karlsruher Institut fuer Technologie, Karlsruhe, Germany
[49] Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
[50] National and Kapodistrian University of Athens, Athens, Greece
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10.1140/epjc/s10052-024-13021-z
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摘要
A search for ZZ and ZH production in the bb¯bb¯ final state is presented, where H is the standard model (SM) Higgs boson. The search uses an event sample of proton-proton collisions corresponding to an integrated luminosity of 133fb-1 collected at a center-of-mass energy of 13TeV with the CMS detector at the CERN LHC. The analysis introduces several novel techniques for deriving and validating a multi-dimensional background model based on control samples in data. A multiclass multivariate classifier customized for the bb¯bb¯ final state is developed to derive the background model and extract the signal. The data are found to be consistent, within uncertainties, with the SM predictions. The observed (expected) upper limits at 95% confidence level are found to be 3.8 (3.8) and 5.0 (2.9) times the SM prediction for the ZZ and ZH production cross sections, respectively. © The Author(s) 2024.
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