IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Measurement of the production cross section for W-bosons in association with jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector.
Autor/es:
ANDUAGA, XABIER SEBASTIAN; THE ATLAS COLLABORATION
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2010 p. 325 - 345
ISSN:
0370-2693
Resumen:
This Letter reports on a first measurement of
the inclusive W+jets cross section in proton-proton collisions at a
centre-of-mass energy of 7 TeV at the LHC, with the ATLAS detector.
Cross sections, in both the electron and muon decay modes of the W
boson, are presented as a function of jet multiplicity and of the
transverse momentum of the leading and next-to-leading jets in the
event. Measurements are also presented of the ratio of cross sections
sigma(W+ \ge n) / sigma(W+ \ge n-1) for inclusive jet multiplicities
n=1-4. The results, based on an integrated luminosity of 1.3 pb-1, have
been corrected for all known detector effects and are quoted in a
limited and well-defined range of jet and lepton kinematics. The
measured cross sections are compared to particle-level predictions based
on perturbative QCD. Next-to-leading order calculations, studied here
for n \le 2, are found in good agreement with the data. Leading-order
multiparton event generators, normalized to the NNLO total cross
section, describe the data well for all measured jet multiplicities.