Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at √s=13 TeV with the ATLAS detector

0519566 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … celkem 2924 autorů
Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at √s=13 TeV with the ATLAS detector.
Journal of High Energy Physics. Roč. 2018, č. 12 (2018), s. 1-56, č. článku 39. ISSN 1029-8479. E-ISSN 1029-8479
Grant CEP: GA MŠMT LM2015058
Institucionální podpora: RVO:68378271
Klíčová slova: ATLAS * CERN LHC Coll * lepton * same sign * mediation * 5/3 * single production * dark matter * singlet * quark
Obor OECD: Particles and field physics
Impakt faktor: 5.833, rok: 2018
Způsob publikování: Open access

A search for new phenomena in events with two same-charge leptons or three leptons and jets identified as originating from b-quarks in a data sample of 36.1 fb−1 of pp collisions at s√=13 TeV recorded by the ATLAS detector at the Large Hadron Collider is reported. No significant excess is found and limits are set on vector-like quark, four-top-quark, and same-sign top-quark pair production. The observed (expected) 95% CL mass limits for a vector-like T- and B-quark singlet are mT > 0.98 (0.99) TeV and mB > 1.00 (1.01) TeV respectively. Limits on the production of the vector-like T5/3-quark are also derived considering both pair and single production, in the former case the lower limit on the mass of the T5/3-quark is (expected to be) 1.19 (1.21) TeV. The Standard Model four-top-quark production cross-section upper limit is (expected to be) 69 (29) fb. Constraints are also set on exotic four-top-quark production models.

Trvalý link: http://hdl.handle.net/11104/0304562