We report the first observation of single top quark production using 3.2 fb-1 of p anti-p collision data with s**(1/2) = 1.96 TeV collected by the Collider Detector at Fermilab. The significance of the observed data is 5.0 standard deviations, and the expected sensitivity is in excess of 5.9 standard deviations. We measure a cross section of 2.3+0.6_-0.5(stat + syst) pb, extract the CKM matrix element value |V(tb)| 0.91+0.11_-0.11(stat + syst) +/- 0.07 (theory), and set the limit |V(tb)| > 0.71 at the 95% C.L.
A. Castro, M. Deninno, P. Mazzanti, N. Moggi, F. Rimondi, F. Semeria, et al. (2009). Observation of Electroweak Single Top Quark Production. PHYSICAL REVIEW LETTERS, 103, 092002-1-092002-8 [10.1103/PhysRevLett.103.092002].
Observation of Electroweak Single Top Quark Production
CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2009
Abstract
We report the first observation of single top quark production using 3.2 fb-1 of p anti-p collision data with s**(1/2) = 1.96 TeV collected by the Collider Detector at Fermilab. The significance of the observed data is 5.0 standard deviations, and the expected sensitivity is in excess of 5.9 standard deviations. We measure a cross section of 2.3+0.6_-0.5(stat + syst) pb, extract the CKM matrix element value |V(tb)| 0.91+0.11_-0.11(stat + syst) +/- 0.07 (theory), and set the limit |V(tb)| > 0.71 at the 95% C.L.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
