Počet záznamů: 1

Precision measurement of the ratio B(t -> Wb)/B(t -> Wq) and extraction of V.sub.tb./sub..

  1. 1.
    0367705 - FZU-D 2013 RIV US eng J - Článek v odborném periodiku
    Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš
    Precision measurement of the ratio B(t -> Wb)/B(t -> Wq) and extraction of Vtb.
    Physical Review Letters. Roč. 107, č. 12 (2011), "121802-1"-"121802-7" ISSN 0031-9007
    Grant CEP: GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: D0 * Tevatron * dilepton * unitarity * branching ratio
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 7.370, rok: 2011

    We present a measurement of the ratio of top quark branching fractions R = B(t -> Wb)/B(t -> Wq), where q can be a d, s, or b quark, in the lepton + jets and dilepton t (t) over bar final states. The measurement uses data from 5: 4 fb(-1) of p (p) over bar collisions collected with the D0 detector at the Fermilab Tevatron Collider. We measure R = 0.90 +/- 0.04, and we extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element vertical bar V(tb)vertical bar as vertical bar V(tb)vertical bar = 0.95 +/- 0.02, assuming unitarity of the 3 x 3 CKM matrix.
    Trvalý link: http://hdl.handle.net/11104/0202287