Search for pair production of vector-like top quarks in events with one lepton, jets, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector

0487745 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … celkem 2858 autorů
Search for pair production of vector-like top quarks in events with one lepton, jets, and missing transverse momentum in √s = 13 TeV pp collisions with the ATLAS detector.
Journal of High Energy Physics. Roč. 2017, č. 8 (2017), s. 1-40, č. článku 052. ISSN 1029-8479. E-ISSN 1029-8479
Institucionální podpora: RVO:68378271
Klíčová slova: exotics * Hadron-Hadron scattering (experiments) * vector-like quarks
Obor OECD: Particles and field physics
Impakt faktor: 5.541, rok: 2017

The results of a search for vector-like top quarks using events with exactly one lepton, at least four jets, and large missing transverse momentum are reported. The search is optimised for pair production of vector-like top quarks in the Z(→νν) t + X decay channel. LHC pp collision data at a centre-of-mass energy of √s=13 TeV recorded by the ATLAS detector in 2015 and 2016 are used, corresponding to an integrated luminosity of 36.1 fb−1. No significant excess over the Standard Model expectation is seen and upper limits on the production cross-section of a vector-like T quark pair as a function of the T quark mass are derived. The observed (expected) 95% CL lower limits on the T mass are 870 GeV (890 GeV) for the weak-isospin singlet model, 1.05 TeV (1.06 TeV) for the weak-isospin doublet model and 1.16 TeV (1.17 TeV) for the pure Zt decay mode.

Trvalý link: http://hdl.handle.net/11104/0282380