Počet záznamů: 1
Determination of the width of the top quark
- 1.0367641 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš … celkem 433 autorů
Determination of the width of the top quark.
Physical Review Letters. Roč. 107, č. 2 (2011), "022001-1"-"022001-7". ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * top quark
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.370, rok: 2011
We extract the total width of the top quark, Gamma(t), from the partial decay width Gamma(t -> Wb) measured using the t-channel cross section for single top-quark production and from the branching fraction B(t -> Wb) measured in t (t) over bar t events using up to 2.3 fb(-1) of integrated luminosity collected by the D0 Collaboration at the Tevatron p (p) over bar Collider. The result is Gamma(t) = 1.99(-0.55)(+0.69) GeV, which translates to a top-quark lifetime of tau(t) = (3.3-(+1.3)(0.9)) x 10(-25) s. Assuming a high mass fourth generation b´ quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on vertical bar V(tb´)vertical bar < 0.63 at 95% C.L.
Trvalý link: http://hdl.handle.net/11104/0202237
Počet záznamů: 1