Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at

Autor: A M, Sirunyan, A, Tumasyan, W, Adam, F, Ambrogi, T, Bergauer, J, Brandstetter, M, Dragicevic, J, Erö, A Escalante, Del Valle, M, Flechl, R, Frühwirth, M, Jeitler, N, Krammer, I, Krätschmer, D, Liko, T, Madlener, I, Mikulec, N, Rad, J, Schieck, R, Schöfbeck, M, Spanring, D, Spitzbart, W, Waltenberger, C-E, Wulz, M, Zarucki, V, Drugakov, V, Mossolov, J, Suarez Gonzalez, M R, Darwish, E A, De Wolf, D, Di Croce, X, Janssen, A, Lelek, M, Pieters, H Rejeb, Sfar, H, Van Haevermaet, P, Van Mechelen, S, Van Putte, N, Van Remortel, F, Blekman, E S, Bols, S S, Chhibra, J, D'Hondt, J, De Clercq, D, Lontkovskyi, S, Lowette, I, Marchesini, S, Moortgat, Q, Python, K, Skovpen, S, Tavernier, W, Van Doninck, P, Van Mulders, D, Beghin, B, Bilin, H, Brun, B, Clerbaux, G, De Lentdecker, H, Delannoy, B, Dorney, L, Favart, A, Grebenyuk, A K, Kalsi, A, Popov, N, Postiau, E, Starling, L, Thomas, C Vander, Velde, P, Vanlaer, D, Vannerom, T, Cornelis, D, Dobur, I, Khvastunov, M, Niedziela, C, Roskas, D, Trocino, M, Tytgat, W, Verbeke, B, Vermassen, M, Vit, N, Zaganidis, O, Bondu, G, Bruno, C, Caputo, P, David, C, Delaere, M, Delcourt, A, Giammanco, V, Lemaitre, A, Magitteri, J, Prisciandaro, A, Saggio, M Vidal, Marono, P, Vischia, J, Zobec, F L, Alves, G A, Alves, G Correia, Silva, C, Hensel, A, Moraes, 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, L M Huertas, Guativa, H, Malbouisson, J, Martins, D Matos, Figueiredo, M Medina, Jaime, 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, C A, Bernardes, L, Calligaris, T R Fernandez Perez, Tomei, E M, Gregores, D S, Lemos, P G, Mercadante, S F, Novaes, SandraS, Padula, A, Aleksandrov, G, Antchev, R, Hadjiiska, P, Iaydjiev, M, Misheva, M, Rodozov, M, Shopova, G, Sultanov, M, Bonchev, A, Dimitrov, T, Ivanov, L, Litov, B, Pavlov, P, Petkov, W, Fang, X, Gao, L, Yuan, M, Ahmad, G M, Chen, H S, Chen, M, Chen, C H, Jiang, D, Leggat, H, Liao, Z, Liu, A, Spiezia, J, Tao, E, Yazgan, H, Zhang, S, Zhang, J, Zhao, A, Agapitos, Y, Ban, G, Chen, A, Levin, J, Li, L, Li, Q, Li, Y, Mao, S J, Qian, D, Wang, Q, Wang, Z, Hu, Y, Wang, M, Xiao, C, Avila, A, Cabrera, C, Florez, C F González, Hernández, M A Segura, Delgado, J Mejia, Guisao, J D Ruiz, Alvarez, C A Salazar, González, N Vanegas, Arbelaez, D, Giljanović, N, Godinovic, D, Lelas, I, Puljak, T, Sculac, Z, Antunovic, M, Kovac, V, Brigljevic, S, Ceci, D, Ferencek, K, Kadija, B, Mesic, M, Roguljic, A, Starodumov, T, Susa, M W, Ather, A, Attikis, E, Erodotou, A, Ioannou, M, Kolosova, S, Konstantinou, G, Mavromanolakis, J, Mousa, C, Nicolaou, F, Ptochos, P A, Razis, H, Rykaczewski, D, Tsiakkouri, M, Finger, A, Kveton, J, Tomsa, E, Ayala, E Carrera, Jarrin, S, Elgammal, E, Salama, S, Bhowmik, A Carvalho Antunes, De Oliveira, R K, Dewanjee, K, Ehataht, M, Kadastik, M, Raidal, C, Veelken, P, Eerola, L, Forthomme, H, Kirschenmann, K, Osterberg, M, Voutilainen, F, Garcia, J, Havukainen, J K, Heikkilä, T, Järvinen, V, Karimäki, M S, Kim, R, Kinnunen, T, Lampén, K, Lassila-Perini, S, Laurila, S, Lehti, T, Lindén, P, Luukka, T, Mäenpää, H, Siikonen, E, Tuominen, J, Tuominiemi, T, Tuuva, M, Besancon, F, Couderc, M, Dejardin, D, Denegri, B, Fabbro, J L, Faure, F, Ferri, S, Ganjour, A, Givernaud, P, Gras, G Hamel, de Monchenault, P, Jarry, C, Leloup, E, Locci, J, Malcles, J, Rander, A, Rosowsky, M Ö, Sahin, A, Savoy-Navarro, M, Titov, S, Ahuja, C, Amendola, F, Beaudette, P, Busson, C, Charlot, B, Diab, G, Falmagne, R Granier, de Cassagnac, I, Kucher, A, Lobanov, C Martin, Perez, M, Nguyen, C, Ochando, P, Paganini, J, Rembser, R, Salerno, J B, Sauvan, Y, Sirois, A, Zabi, A, Zghiche, J-L, Agram, J, Andrea, D, Bloch, G, Bourgatte, J-M, Brom, E C, Chabert, C, Collard, E, Conte, J-C, 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A, Nehrkorn, A, Nowack, C, Pistone, O, Pooth, D, Roy, H, Sert, A, Stahl, M Aldaya, Martin, P, Asmuss, I, Babounikau, H, Bakhshiansohi, K, Beernaert, O, Behnke, A Bermúdez, Martínez, D, Bertsche, A A Bin, Anuar, K, Borras, V, Botta, A, Campbell, A, Cardini, P, Connor, S Consuegra, Rodríguez, C, Contreras-Campana, V, Danilov, A, De Wit, M M, Defranchis, C Diez, Pardos, D Domínguez, Damiani, G, Eckerlin, D, Eckstein, T, Eichhorn, A, Elwood, E, Eren, E, Gallo, A, Geiser, A, Grohsjean, M, Guthoff, M, Haranko, A, Harb, A, Jafari, N Z, Jomhari, H, Jung, A, Kasem, M, Kasemann, H, Kaveh, J, Keaveney, C, Kleinwort, J, Knolle, D, Krücker, W, Lange, T, Lenz, J, Leonard, J, Lidrych, K, Lipka, W, Lohmann, R, Mankel, I-A, Melzer-Pellmann, A B, Meyer, M, Meyer, M, Missiroli, G, Mittag, J, Mnich, A, Mussgiller, V, Myronenko, D Pérez, Adán, S K, Pflitsch, D, Pitzl, A, Raspereza, A, Saibel, M, Savitskyi, V, Scheurer, P, Schütze, C, Schwanenberger, R, Shevchenko, A, Singh, H, Tholen, O, Turkot, A, 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Rok vydání: 2019
Předmět:
Zdroj: The European Physical Journal. C, Particles and Fields
ISSN: 1434-6044
Popis: The standard model (SM) production of four top quarks (\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t} {}{\overline{\text {t}}} \text {t} {}{\overline{\text {t}}} $$\end{document}tt¯tt¯) in proton–proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016–2018 data taking of the LHC, corresponds to an integrated luminosity of 137\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {fb}^{-1}$$\end{document}fb-1 at a center-of-mass energy of 13\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {TeV}$$\end{document}TeV. The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t} {}{\overline{\text {t}}} \text {t} {}{\overline{\text {t}}} $$\end{document}tt¯tt¯ signal are respectively 2.6 and 2.7 standard deviations, and the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t} {}{\overline{\text {t}}} \text {t} {}{\overline{\text {t}}} $$\end{document}tt¯tt¯ cross section is measured to be \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$12.6^{+5.8}_{-5.2}\,\text {fb} $$\end{document}12.6-5.2+5.8fb. The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$y_{\text {t}}$$\end{document}yt, yielding a limit of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|y_{\text {t}}/y_{\text {t}}^{\mathrm {SM}} | < 1.7$$\end{document}|yt/ytSM
Databáze: OpenAIRE