Počet záznamů: 1

Search for single top quarks in the tau+jets channel using 4.8 fb.sup.-1./sup. of p p-bar collision data

  1. 1.
    0352066 - FZU-D 2011 RIV NL eng J - Článek v odborném periodiku
    Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
    Search for single top quarks in the tau+jets channel using 4.8 fb-1 of p p-bar collision data.
    Physics Letters. B. Roč. 690, č. 1 (2010), s. 5-14 ISSN 0370-2693
    Grant CEP: GA MŠk LC527; GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: D0 * quark * collisions * lepton
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 5.255, rok: 2010

    We present the first direct search for single top quark production using tau leptons. The search is based on 4.8 fb-1$ of integrated luminosity collected in $p/bar{p}$ collisions at $/sqrt{s}$=1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. We select events with a final state including an isolated tau lepton, missing transverse energy, two or three jets, one or two of them $b$ tagged. We use a multivariate technique to discriminate signal from background. The number of events observed in data in this final state is consistent with the signal plus background expectation. We set in the tau+jets channel an upper limit on the single top quark cross section of /TauLimObs pb at the 95% C.L. This measurement allows a gain of 4% in expected sensitivity for the observation of single top production when combining it with electron+jets and muon+jets channels already published by the D0 collaboration with 2.3 fb-1$ of data.
    Trvalý link: http://hdl.handle.net/11104/0191663