TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2014
DA  - 2014//
TI  - Measurement of the forward W boson cross-section in pp collisions at root s = 7 TeV
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 079
EP  - 25pp
VL  - 12
IS  - 12
PB  - Springer
KW  - Hadron-Hadron Scattering
KW  - QCD
KW  - Forward physics
AB  - A measurement of the inclusive W -> μnu production cross-section using data from pp collisions at a centre-of-mass energy of root s=7 TeV is presented. The analysis is based on an integrated luminosity of about 1.0 fb(-1) recorded with the LHCb detector. Results are reported for muons with a transverse momentum greater than 20 GeV/c and pseudorapidity between 2.0 and 4.5. The W+ and W- production cross-sections are measured to be sigma(W+->mu+nu)=861.0 +/- 2.0 +/- 11.2 +/- 14.7pb, sigma(W-->mu-(nu)over bar)=675.8 +/- 1.9 +/- 8.8 +/- 11.6pb, where the first uncertainty is statistical, the second is systematic and the third is due to the luminosity determination. Cross-section ratios and differential distributions as functions of the muon pseudorapidity are also presented. The ratio of W+ to W- cross-sections in the same fiducial kinematic region is determined to be sigma(W+->mu+nu)/sigma(W-->mu-(nu)over bar) = 1.274 +/- 0.005 +/- 0.009, where the uncertainties are statistical and systematic, respectively. Results are in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1408.4354
UR  - https://doi.org/10.1007/JHEP12(2014)079
DO  - 10.1007/JHEP12(2014)079
LA  - English
N1  - WOS:000346250100002
ID  - LHCbCollaborationAaij_etal2014
ER  -