作者
Aram Hayrapetyan, Armen Tumasyan, Wolfgang Adam, Janik Walter Andrejkovic, Thomas Bergauer, Suman Chatterjee, Konstantinos Damanakis, Marko Dragicevic, A Escalante Del Valle, Priya Sajid Hussain, Manfred Jeitler, Natascha Krammer, Dietrich Liko, Ivan Mikulec, Jochen Schieck, Robert Schöfbeck, Dennis Schwarz, Mangesh Sonawane, Sebastian Templ, Wolfgang Waltenberger, C-E Wulz, Mohamed Rashad Darwish, Tahys Janssen, Pierre Van Mechelen, Emil Sørensen Bols, Jorgen d'Hondt, Soumya Dansana, Alexandre De Moor, Martin Delcourt, Hesham El Faham, Steven Lowette, Inna Makarenko, Denise Müller, Abanti Ranadhir Sahasransu, Stefaan Tavernier, Michael Tytgat, Senne Van Putte, David Vannerom, Barbara Clerbaux, Gilles De Lentdecker, Laurent Favart, Dmytro Hohov, Johny Jaramillo, Ali Khalilzadeh, Kyeongpil Lee, Mostafa Mahdavikhorrami, Andrea Malara, Santiago Paredes, Laurent Pétré, Nicolas Postiau, Laurent Thomas, M Vanden Bemden, C Vander Velde, P Vanlaer, Maarten De Coen, Didar Dobur, Yanwen Hong, Joscha Knolle, Luka Lambrecht, Gianny Mestdach, Cesar Rendón, Amrutha Samalan, Kirill Skovpen, Niels Van den Bossche, Liam Wezenbeek, A Benecke, G Bruno, C Caputo, C Delaere, IS Donertas, A Giammanco, K Jaffel, Sa Jain, V Lemaitre, J Lidrych, P Mastrapasqua, K Mondal, TT Tran, S Wertz, GA Alves, E Coelho, C Hensel, T Menezes De Oliveira, A Moraes, P Rebello Teles, M Soeiro, WL Aldá Júnior, M Alves Gallo Pereira, M Barroso Ferreira Filho, H Brandao Malbouisson, W Carvalho, J Chinellato, EM Da Costa, GG Da Silveira, D De Jesus Damiao, S Fonseca De Souza, J Martins, C Mora Herrera, K Mota Amarilo, L Mundim, H Nogima, A Santoro, SM Silva Do Amaral, A Sznajder, M Thiel, A Vilela Pereira, CA Bernardes, L Calligaris, TR Fernandez Perez Tomei, EM Gregores, PG Mercadante, SF Novaes, B Orzari, Sandra S Padula, A Aleksandrov, G Antchev, R Hadjiiska, P Iaydjiev, M Misheva, M Shopova, G Sultanov, A Dimitrov, T Ivanov, L Litov, B Pavlov, P Petkov, A Petrov, E Shumka, S Keshri, S Thakur, T Cheng, Q Guo, T Javaid, M Mittal, L Yuan, G Bauer, Z Hu, K Yi, GM Chen, HS Chen, M Chen, F Iemmi, CH Jiang, A Kapoor, H Liao, Z-A Liu, F Monti, MA Shahzad, R Sharma, JN Song
发表日期
2023/12/10
期刊
Physics Letters B
卷号
847
页码范围
138290
出版商
North-Holland
简介
The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138 fb− 1. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7− 3.5+ 3.7 (stat …
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