Search for flavour-changing neutral current top quark decays t→Hq in pp collisions at √s=8 TeV with the ATLAS detector

0465520 - FZÚ 2017 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abdallah, J. - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … Total 2865 authors
Search for flavour-changing neutral current top quark decays t→Hq in pp collisions at √s=8 TeV with the ATLAS detector.
Journal of High Energy Physics. Roč. 2015, č. 12 (2015), s. 1-64, č. článku 061. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA MŠMT(CZ) LG13009
Institutional support: RVO:68378271
Keywords : hadron colliders * p(p)over-bar collisions * parton distributions * pair production * cross-section * couplings * models * LHC * LEP
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 6.023, year: 2015

A search for flavour-changing neutral current decays of a top quark to an uptype quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to bb¯¯, is presented. The analysis searches for top quark pair events in which one top quark decays to Wb, with the W boson decaying leptonically, and the other top quark decays to Hq. The search is based on pp collisions at s√=8 TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and uses an integrated luminosity of 20.3 fb−1. Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of b-quark jets characteristic of signal events, and employs a likelihood discriminant that uses the kinematic differences between the signal and the background, which is dominated by tt¯→WbWb decays.
Permanent Link: http://hdl.handle.net/11104/0264053