Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel

0389758 - FZÚ 2013 RIV NL 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 3005 autorů
Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel.
Physics Letters. B. Roč. 711, 3-4 (2012), s. 244-263. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LA08032
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: ATLAS * LHC * top physics * top pair production * QCD * sensitivity * cross section * bottom particle identification
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.569, rok: 2012
http://arxiv.org/abs/arXiv:1201.1889

A measurement of the production cross-section for top quark pairs (t tbar) in pp collisions at sqrt{s} = 7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35/pb, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of sigma (t tbar) = 187 +/- 11 (stat.) +18-17 (syst.) +/- 6 (lumi.) pb and sigma (t tbar) = 173 +/- 17 (stat.) +18-16 (syst.) +/- 6 (lumi.) pb} respectively. The two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.
Trvalý link: http://hdl.handle.net/11104/0218622