Počet záznamů: 1

Measurement of the t-channel single top quark production cross section

  1. 1.
    0342506 - FZU-D 2011 RIV NL eng J - Článek v odborném periodiku
    Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
    Measurement of the t-channel single top quark production cross section.
    Physics Letters. B. Roč. 682, 4-5 (2010), 363-369 ISSN 0370-2693
    Grant CEP: GA MŠk LC527; GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: D0 * virtual W boson * top quark
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 5.255, rok: 2010

    The D0 collaboration reports direct evidence for electroweak production of single top quarks through the t-channel exchange of a virtual W boson. This is the first analysis to isolate an individual single top quark production channel. We select events containing an isolated electron or muon, missing transverse energy, and two, three or four jets from 2.3 fb^-1 of ppbar collisions at the Fermilab Tevatron Collider. One or two of the jets are identified as containing a b hadron. We combine three multivariate techniques optimized for the t-channel process to measure the t- and s-channel cross sections simultaneously. We measure cross sections of 3.14 +0.94 -0.80 pb for the t-channel and 1.05 +-0.81 pb for the s-channel. The measured t-channel result is found to have a significance of 4.8 standard deviations and is consistent with the standard model prediction.
    Trvalý link: http://hdl.handle.net/11104/0185225