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  1. Pubblicazioni

Search for top squark production in fully hadronic final states in proton-proton collisions at sqrt(s) = 13 TeV

Articolo
Data di Pubblicazione:
2021
Abstract:
A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137 fb(-1). The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeVare established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Dragicevic, M.; Escalante Del Valle, A.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Mikulec, I.; Pitters, F. M.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Templ, S.; Waltenberger, W.; Wulz, C.-E.; Chekhovsky, V.; Litomin, A.; Makarenko, V.; Darwish, M. R.; De Wolf, E. A.; Janssen, X.; Kello, T.; Lelek, A.; Rejeb Sfar, H.; Van Mechelen, P.; Van Putte, S.; Van Remortel, N.; Blekman, F.; Bols, E. S.; D’Hondt, J.; De Clercq, J.; Delcourt, M.; Lowette, S.; Moortgat, S.; Morton, A.; Müller, D.; Sahasransu, A. R.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Beghin, D.; Bilin, B.; Clerbaux, B.; De Lentdecker, G.; Favart, L.; Grebenyuk, A.; Kalsi, A. K.; Lee, 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.; 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.; 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.; Barroso Ferreira Filho, M.; Brandao Malbouisson, H.; Carvalho, W.; Chinellato, J.; Da Costa, E. M.; Da Silveira, G. G.; De Jesus Damiao, D.; Fonseca De Souza, S.; Martins, J.; Matos Figueiredo, D.; Mora Herrera, C.; Mota Amarilo, K.; 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.; Tomei, T. R. Fernandez Perez; 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.; Dimitrov, A.; Ivanov, T.; Litov, L.; Pavlov, B.; Petkov, P.; Petrov, A.; Cheng, T.; Fang, W.; Guo, Q.; Javaid, T.; Mittal, M.; Wang, H.; Yuan, L.; Ahmad, M.; Bauer, G.; Dozen, C.; Hu, Z.; Wang, Y.; Yi, K.; Chapon, E.; Chen, G. M.; Chen, H. S.; Chen, M.; Kapoor, A.; Leggat, D.; Liao, H.; LIU, Z.-A.; Sharma, R.; Spiezia, A.; Tao, J.; Thomas-Wilsker, J.; Wang, J.; Zhang, H.; Zhang, S.; Zhao, J.; Agapitos, A.; Ban, Y.; Chen, C.; Huang, Q.; Levin, A.; Li, Q.; Lu, M.; Lyu, X.; Mao, Y.; Qian, S. J.; Wang, D.; Wang, Q.; Xiao, J.; You, Z.; Gao, X.; Okawa, H.; Xiao, M.; Avila, C.; Cabrera, A.; Florez, C.; Fraga, J.; Sarkar, A.; Segura Delgado, M. A.; Jaramillo, J.; Mejia Guisao, J.; Ramirez, F.; Ruiz Alvarez, J. D.; Salazar González, C. A.; Vanegas Arbelaez, N.; Giljanovic, D.; Godinovic, N.; Lelas, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Sculac, T.; Brigljevic, V.; Ferencek, D.; Majumder, D.; Roguljic, M.; Starodumov, A.; Susa, T.; Attikis, A.; Erodotou, E.; Ioannou, A.; Kole, G.; Kolosova, M.; Konstantinou, S.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Rykaczewski, H.; Saka, H.; Finger, M.; Finger, M.; Kveton, A.; Tomsa, J.; Ayala, E.; Carrera Jarrin, E.; Abu Zeid, S.; Khalil, S.; Salama, E.; Lotfy, A.; Mahmoud, M. A.; Bhowmik, S.; Carvalho Antunes De Oliveira, A.; Dewanjee, R. K.; Ehataht, K.; Kadastik, M.; Pata, J.; Raidal, M.; Veelken, C.; Eerola, P.; Forthomme, L.; Kirschenmann, H.; Osterberg, K.; Voutilainen, M.; Brücken, E.; Garcia, F.; Havukainen, J.; Karimäki, V.; Kim, M. S.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Lehti, S.; Lindén, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Luukka, P.; Petrow, H.; Tuuva, T.; Amendola, C.; Besancon, M.; Couderc, F.; Dejardin, M.; Denegri, D.; Faure, J. L.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Lenzi, B.; Locci, E.; Malcles, J.; Rander
Autori di Ateneo:
AMAPANE Nicola Carlo
ARGIRO' Stefano
BELLAN Riccardo
BELLORA ANDREA
COSTA Marco
COVARELLI Roberto
MERIDIANI Paolo
MIGLIORE Ernesto
MONACO Vincenzo
OBERTINO Maria Margherita
PACHER Luca
RUMERIO Paolo Giuseppe
SOLA Valentina
SOLANO Ada Maria
Link alla scheda completa:
https://iris.unito.it/handle/2318/1959230
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1959230/1245888/PhysRevD.104.052001.pdf
Pubblicato in:
PHYSICAL REVIEW D
Journal
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