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Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at s= 13 TeV

Academic Article
Publication Date:
2021
abstract:
A search for new top quark interactions is performed within the framework of an effective field theory using the associated production of either one or two top quarks with a Z boson in multilepton final states. The data sample corresponds to an integrated luminosity of 138 fb(-1) of proton-proton collisions at root s = 13 TeV collected by the CMS experiment at the LHC. Five dimension-six operators modifying the electroweak interactions of the top quark are considered. Novel machine-learning techniques are used to enhance the sensitivity to effects arising from these operators. Distributions used for the signal extraction are parameterized in terms of Wilson coefficients describing the interaction strengths of the operators. All five Wilson coefficients are simultaneously fit to data and 95% confidence level intervals are computed. All results are consistent with the SM expectations.
Iris type:
1.1 Articolo in rivista
Keywords:
Hadron-Hadron scattering (experiments); Top physics
List of contributors:
Tonon, N.; Aarup Petersen, H.; Aldaya Martin, M.; Asmuss, P.; Baxter, S.; Bayatmakou, M.; Behnke, O.; Berm??dez Mart??nez, A.; Bhattacharya, S.; Bin Anuar, A. A.; Borras, K.; Brunner, D.; Campbell, A.; Cardini, A.; Cheng, C.; Colombina, F.; Consuegra Rodr??guez, S.; Correia Silva, G.; Danilov, V.; De Silva, M.; Didukh, L.; Eckerlin, G.; Eckstein, D.; Estevez Banos, L. I.; Filatov, O.; Gallo, E.; Geiser, A.; Giraldi, A.; Grohsjean, A.; Guthoff, M.; Jafari, A.; Jomhari, N. Z.; Jung, H.; Kasem, A.; Kasemann, M.; Kaveh, H.; Kleinwort, C.; Kr??cker, D.; Lange, W.; Lidrych, J.; Lipka, K.; Lohmann, W.; Mankel, R.; Melzer-Pellmann, I. -A.; Mendizabal Morentin, M.; Metwally, J.; Meyer, A. B.; Meyer, M.; Mnich, J.; Mussgiller, A.; Otarid, Y.; P??rez Ad??n, D.; Pitzl, D.; Raspereza, A.; Ribeiro Lopes, B.; R??benach, J.; Saggio, A.; Saibel, A.; Savitskyi, M.; Scham, M.; Scheurer, V.; Sch??tze, P.; Schwanenberger, C.; Singh, A.; Sosa Ricardo, R. E.; Stafford, D.; Van De Klundert, M.; Walsh, R.; Walter, D.; Wen, Y.; Wichmann, K.; Wiens, L.; Wissing, C.; Wuchterl, S.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Dragicevic, M.; Escalante Del Valle, A.; Fr??hwirth, R.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Mikulec, I.; Paulitsch, P.; Pitters, F. M.; Schieck, J.; Sch??fbeck, R.; Schwarz, D.; Templ, S.; Waltenberger, W.; Wulz, C. -E.; Chekhovsky, V.; Litomin, A.; Makarenko, V.; Darwish, M. R.; De Wolf, E. A.; Janssen, T.; Kello, T.; Lelek, A.; Rejeb Sfar, H.; Van Mechelen, P.; Van Putte, S.; Van Remortel, N.; Blekman, F.; Bols, E. S.; D???hondt, J.; Delcourt, M.; El Faham, H.; Lowette, S.; Moortgat, S.; Morton, A.; M??ller, 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.; Mahdavikhorrami, M.; Makarenko, I.; Moureaux, L.; P??tr??, L.; Popov, A.; Postiau, N.; Starling, E.; Thomas, L.; Vanden Bemden, M.; Vander Velde, C.; Vanlaer, P.; Wezenbeek, L.; Cornelis, T.; Dobur, D.; Knolle, J.; Lambrecht, L.; Mestdach, G.; Niedziela, M.; Roskas, C.; Samalan, A.; Skovpen, K.; Tytgat, M.; Vermassen, B.; Vit, M.; Benecke, A.; Bethani, A.; Bruno, G.; Bury, F.; Caputo, C.; David, P.; Delaere, C.; Donertas, I. S.; Giammanco, A.; Jaffel, K.; Jain, Sa.; Lemaitre, V.; Mondal, K.; Prisciandaro, J.; Taliercio, A.; Teklishyn, M.; Tran, T. T.; Vischia, P.; Wertz, S.; Alves, G. A.; Hensel, C.; Moraes, A.; Ald?? J??nior, W. L.; Alves Gallo Pereira, M.; 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.; Matos Figueiredo, D.; Mora Herrera, C.; Mota Amarilo, K.; Mundim, L.; Nogima, H.; Rebello Teles, P.; 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.; 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.; Javaid, T.; Mittal, M.; Yuan, L.; Ahmad, M.; Bauer, G.; Dozen, C.; Hu, Z.; Martins, J.; Wang, Y.; Yi, K.; Chapon, E.; Chen, G. M.; Chen, H. S.; Chen, M.; Iemmi, F.; Kapoor, A.; Leggat, D.; Liao, H.; Liu, Z. -A.; Milosevic, V.; Monti, F.; Sharma, R.; Tao, J.; Thomas-Wilsker, J.; Wang, J.; Zhang, H.; Zhao, J.; Agapitos, A.; An, Y.; Ban, Y.; Chen, C.; Levin, A.; Li, Q.; Lyu, X.; Mao, Y.; Qian, S. J.; Wang, D.; Wang, Q.; Xiao, J.; Lu, M.; You, Z.; Gao, X.; Okawa, H.; Lin, Z.; Xiao, M.; Avila, C.; Cabrera, A.; Florez, C.; Fraga, J.; Mejia Guisao, J.; Ramirez, F.; Ruiz Alvarez, J. D.; Salazar Gonz??lez, C. A.; Giljanovic, D.; Godinovic, N.; Lelas, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Sculac, T.; Brigljevic, V.; Ferencek, D.; Majumder, D.; Roguljic, M.
Authors of the University:
AIMÈ CHIARA
MONTAGNA PAOLO MARIA
PELLICCIONI MARIO
RICCARDI CRISTINA
SALVINI PAOLA
VAI ILARIA
VITULO PAOLO
Handle:
https://iris.unipv.it/handle/11571/1477272
Published in:
JOURNAL OF HIGH ENERGY PHYSICS
Journal
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