Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of High Energy Physics Year : 2012

Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV

S. Chatrchyan
  • Function : Author
Pierre Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier

Abstract

A measurement of the single-top-quark t-channel production cross section in pp collisions at sqrt(s) = 7 TeV with the CMS detector at the LHC is presented. Two different and complementary approaches have been followed. The first approach exploits the distributions of the pseudorapidity of the recoil jet and reconstructed top-quark mass using background estimates determined from control samples in data. The second approach is based on multivariate analysis techniques that probe the compatibility of the candidate events with the signal. Data have been collected for the muon and electron final states, corresponding to integrated luminosities of 1.17 and 1.56 inverse femtobarns, respectively. The single-top-quark production cross section in the t-channel is measured to be 67.2 +/- 6.1 pb, in agreement with the approximate next-to-next-to-leading-order standard model prediction. Using the standard model assumption that the CKM matrix element abs(V[tb]]) is less than one, we infer the interval 0.92 < abs(V[tb]]) <= 1 at the 95% confidence level.

Dates and versions

in2p3-00734207 , version 1 (21-09-2012)

Identifiers

Cite

S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV. Journal of High Energy Physics, 2012, 12, pp.035. ⟨10.1007/JHEP12(2012)035⟩. ⟨in2p3-00734207⟩
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