Search for pair production of a new heavy quark that decays into a W boson and a light quark in pp collisions at √s=8 TeV with the ATLAS detector

0465274 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
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 … celkem 2865 autorů
Search for pair production of a new heavy quark that decays into a W boson and a light quark in pp collisions at √s=8 TeV with the ATLAS detector.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 92, č. 11 (2015), s. 1-28, č. článku 112007. ISSN 1550-7998
Grant CEP: GA MŠMT(CZ) LG13009
Institucionální podpora: RVO:68378271
Klíčová slova: electroweak symmetry-breaking * parton distributions * hadron colliders * final-state * LHC
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.506, rok: 2015

A search is presented for pair production of a new heavy quark (Q) that decays into a W boson and a light quark (q) in the final state where one W boson decays leptonically (to an electron or muon plus a neutrino) and the other W boson decays hadronically. The analysis is performed using an integrated luminosity of 20.3  fb−1 of pp collisions at s√=8  TeV collected by the ATLAS detector at the LHC. No evidence of QQ¯ production is observed. New chiral quarks with masses below 690 GeV are excluded at 95% confidence level, assuming BR(Q→Wq)=1. Results are also interpreted in the context of vectorlike quark models, resulting in the limits on the mass of a vectorlike quark in the two-dimensional plane of BR(Q→Wq) versus BR(Q→Hq).
Trvalý link: http://hdl.handle.net/11104/0263912