Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at √s= 13 TeV with the ATLAS detector

0534242 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abbott, D.C. - 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 2928 autorů
Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at √s= 13 TeV with the ATLAS detector.
Journal of High Energy Physics. Roč. 2020, č. 10 (2020), s. 1-46, č. článku 005. ISSN 1029-8479. E-ISSN 1029-8479
Grant CEP: GA MŠMT(CZ) LTT17018
Výzkumná infrastruktura: CERN-CZ II - 90104
Institucionální podpora: RVO:68378271
Klíčová slova: ATLAS * CERN * LHC * gravitation * LSP * higgsino
Obor OECD: Particles and field physics
Impakt faktor: 5.810, rok: 2020
Způsob publikování: Open access

A search for a chargino-neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. The study is based on the data collected between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb−1^{−1}−1 of pp collisions at a centre-of-mass energy of 13 TeV. No significant excess over the expected background is observed. Upper limits at 95% confidence level for a massless χ~10 { ilde{chi}}_1^0 χ~​10​ are set on several electroweakino production cross-sections and the visible cross-section for beyond the Standard Model processes. In the context of simplified supersymmetric models, 95% confidence-level limits of up to 310 GeV in m(χ~1±/χ~20) mleft({ ilde{chi}}_1^{pm }/{ ilde{chi}}_2^0 ight) m(χ~​1±​/χ~​20​), where m(χ~10) mleft({ ilde{chi}}_1^0 ight) m(χ~​10​) = 0.5 GeV, are set.
Trvalý link: http://hdl.handle.net/11104/0312470