Search for a scalar partner of the top quark in the all-hadronic tt¯ plus missing transverse momentum final state at √s=13 TeV with the ATLAS detector

0537555 - FZÚ 2021 RIV DE eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - 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 … Total 2926 authors
Search for a scalar partner of the top quark in the all-hadronic tt¯ plus missing transverse momentum final state at √s=13 TeV with the ATLAS detector.
European Physical Journal C. Roč. 80, č. 8 (2020), s. 1-44, č. článku 737. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271
Keywords : ATLAS * CERN * LHC
OECD category: Particles and field physics
Impact factor: 4.590, year: 2020
Method of publishing: Open access

A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic ttˉt{ ar{t}}ttˉ plus missing transverse momentum final state is presented. The analysis of 139 hbox {fb}^{-1} of s=13{sqrt{s}=13}s ​=13 TeV proton–proton collision data collected using the ATLAS detector at the LHC yields no significant excess over the Standard Model background expectation. To interpret the results, a supersymmetric model is used where the top squark decays via t~→t(∗)χ~10{ ilde{t}} ightarrow t^{(*)} { ilde{chi }}^0_1t~→t(∗)χ~​10​, with t(∗)t^{(*)}t(∗) denoting an on-shell (off-shell) top quark and χ~10{ ilde{chi }}^0_1χ~​10​ the lightest neutralino.
Permanent Link: http://hdl.handle.net/11104/0315376