Measurement of t(t)over-bar production in the tau plus jets topology using p(p)over-bar collisions at √s=1.96TeV

0365707 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš … celkem 433 autorů
Measurement of t(t)over-bar production in the tau plus jets topology using p(p)over-bar collisions at √s=1.96TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 82, č. 7 (2010), "071102-1"-"071102-7". ISSN 1550-7998
Grant CEP: GA MŠMT LC527; GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 detector * lepton * top quark
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.964, rok: 2010
http://link.aps.org/doi/10.1103/PhysRevD.82.071102

We present a measurement of the t (t) over bar production cross section multiplied by the branching ratio to tau lepton decaying semihadronically (tau(h)) plus jets, sigma(p (p) over bar -> t (t) over bar + X) center dot BR(t (t) over bar -> tau(h) + jets), at a center of mass energy root s = 1.96 TeV using 1 fb(-1) of integrated luminosity collected with the D0 detector. Assuming a top quark mass of 170 GeV, we measure sigma(t (t) over bar) center dot BR(tau h) (+ j) = 0.60(-0.22)(+0.23)(stat)(-0.14)(+0.15)(syst) +/- 0.04(lumi) pb. In addition, we extract the t (t) over bar production cross section using the t (t) over bar -> tau(h) + jets topology, with the result sigma(t (t) over bar) = 6.9(-1.2)(+1.2)(stat)(-0.7)(+0.8)(syst) +/- 0.4(lumi) pb. These findings are in good agreement with standard model predictions and measurements performed using other top quark decay channels.
Trvalý link: http://hdl.handle.net/11104/0200884