Observation of same-sign WW production from double parton scattering in proton-proton collisions at √s = 13 TeV

作     者：Sirunyan, A.M. Tumasyan, A. Adam, W. Bergauer, T. Dragicevic, M. Erö, J. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Madlener, T. Mikulec, I. Pitters, F.M. Rad, N. Schieck, J. Schöfbeck, R. Spanring, M. Templ, S. Waltenberger, W. Wulz, C.-E. Zarucki, M. Chekhovsky, V. Litomin, A. Makarenko, V. Suarez Gonzalez, J. Darwish, M.R. de Wolf, E.A. Di Croce, D. Janssen, X. Kello, T. 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. Morton, A. 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. Vander Velde, C. Vanlaer, P. Vannerom, D. Wezenbeek, L. Cornelis, T. Dobur, D. Gruchala, M. Khvastunov, I. Niedziela, M. Roskas, C. Skovpen, K. Tytgat, M. Verbeke, W. Vermassen, B. Vit, M. 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. Aldá Júnior, W.L. Belchior Batista Das Chagas, E. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Coelho, E. da Costa, E.M. da Silveira, G.G. de Jesus Damiao, D. Fonseca De Souza, S. Martins, J. Matos Figueiredo, D. Medina Jaime, M. Mora Herrera, C. Mundim, L. Nogima, H. Rebello Teles, P. Sanchez Rosas, L.J. Santoro, A. Silva Do Amaral, S.M. Sznajder, A. Thiel, M. Torres Da Silva De Araujo, F. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, E.M. Lemos, D.S. Mercadante, P.G. Novaes, S.F. Padula, Sandra S. Aleksandrov, A. Antchev, G. Atanasov, I. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. Shopova, M. Sultanov, G. Bonchev, M. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, B. 

作者机构：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 L'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 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 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 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 University of Technology Lappeenranta Finland IRFU CEA L'Université Paris-Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Paris France Université de Strasbourg CNRS IPHC UMR 7178 Strasbourg France Université de Lyon Université Claude Bernard Lyon 1 CNRS-IN2P3 Institut de Physique Nucléaire de Lyon Villeurbanne France Georgian Technical University Tbilisi Georgia RWTH Aachen University I. Physikalisches Institut Aachen Germany RWTH Aachen University III. Physikalisches Institut C Aachen Germany RWTH Aachen University III. Physikalisches Institut B Aachen Germany The Deutsches Elektronen Synchrotron Hamburg Germany The University of Hamburg Hamburg Germany Karlsruher Institut fuer Technologie Karlsruhe Germany Institute of Nuclear and Particle Physics INPP NCSR Demokritos Aghia Paraskevi Greece National and Kapodistrian the University of Athens Athens Greece National Technical University of Athens Athens Greece University of Ioánnina Ioánnina Greece MTA ELTE Lendület CMS Particle and Nuclear Physics Group The Eötvös Loránd University Budapest Hungary Wigner Research Centre for Physics Budapest Hungary Institute of Nuclear Research ATOMKI Debrecen Hungary Institute of Physics University of Debrecen Debrecen Hungary Eszterhazy Karoly University Karoly Robert Campus Gyongyos Hungary Indian Institute of Science IISc Bangalore India National Institute of Science Education and Research HBNI Bhubaneswar India Panjab University Chandigarh India University of Delhi Delhi India Saha Institute of Nuclear Physics HBNI Kolkata India Indian Institute of Technology Madras Madras India Bhabha Atomic Research Centre Mumbai India Tata Institute of Fundamental Research-A Mumbai India Tata Institute of Fundamental Research-B Mumbai India Indian Institute of Science Education and Research IISER Pune India Department of Physics Isfahan University of Technology Isfahan Iran  Tehran Iran University College Dublin Dublin Ireland INFN-Sezione di Bari Bari Italy Università di Bari Bari Italy Politecnico di Bari Bari Italy INFN Sezione di Bologna Bologna Italy Università di Bologna Bologna Italy INFN Sezione di Catania Catania Italy Università di Catania Catania Italy INFN Sezione di Firenze Firenze Italy Università di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy Università di Genova Genova Italy INFN Sezione di Milano-Bicocca Milano Italy Università di Milano Bicocca Milano Italy INFN Sezione di Napoli Napoli Italy Università di Napoli’Federico II’ Napoli Italy Università della Basilicata Potenza Italy Università G. Marconi Roma Italy INFN Sezione di Padova Padova Italy Università di Padova Padova Italy INFN Sezione di Pavia Pavia Italy Università di Pavia Pavia Italy INFN Sezione di Perugia Perugia Italy Università di Perugia Perugia Italy INFN Sezione di Pisa Pisa Italy Università di Pisa Pisa Italy Scuola Normale Superiore di Pisa Pisa Italy INFN Sezione di Roma Rome Italy Sapienza Università di Roma Rome Italy INFN Sezione di Torino Torino Italy 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2022年

核心收录：

主　　题：Maximum likelihood 

摘      要：The first observation of the production of W±W± bosons from double parton scattering processes using same-sign electron-muon and dimuon events in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of 138 fb−1 recorded at a center-of-mass energy of 13 TeV using the CMS detector at the CERN LHC. Multivariate discriminants are used to distinguish the signal process from the main backgrounds. A binned maximum likelihood fit is performed to extract the signal cross section. The measured cross section for production of same-sign W bosons decaying leptonically is 80.7 ± 11.2 (stat)+−9.58.6 (syst) ± 12.1 (model) fb, whereas the measured fiducial cross section is 6.28 ± 0.81 (stat) ± 0.69 (syst) ± 0.37 (model) fb. The observed significance of the signal is 6.2 standard deviations above the background-only hypothesis. © 2022, CC BY.