Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons

0389714 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abdallah, J. - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Hruška, I. - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lipinský, L. - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Panušková, M. - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav - Zeman, Martin … celkem 3040 autorů
Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons.
Physical Review Letters. Roč. 109, č. 3 (2012), "032001-1"-"032001-17". ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LA08032
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: ATLAS * LHC * 4 family * W leptonic decay * jet multiplicity * heavy quark decay
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.943, rok: 2012
http://arxiv.org/abs/arXiv:1202.6540

This Letter presents a search for pair production of heavy down-type quarks decaying via b' -> Wt in the lepton + jets channel, as b'(b) over bar' -> W(-)tW(+)(t) over bar -> b (b) over barW(+)W(-)W(+)W- -> l(+/-) nu b (b) over barq (q) over barq (q) over barq ($) over barq. In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04 fb(-1) from pp collisions at root s = 7 TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.
Trvalý link: http://hdl.handle.net/11104/0218573