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 σ(W+≥n)/σ(W+≥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≤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. © 2011 CERN Elsevier B.V.
Documento: | Artículo |
Título: | Measurement of the production cross section for W-bosons in association with jets in pp collisions at √s=7 TeV with the ATLAS detector |
Autor: | Multitudinario:3049 |
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Palabras clave: | 7 TeV; ATLAS; Jets; LHC; Proton-proton; W-boson |
Año: | 2011 |
Volumen: | 698 |
Número: | 5 |
Página de inicio: | 325 |
Página de fin: | 345 |
DOI: | http://dx.doi.org/10.1016/j.physletb.2011.03.012 |
Título revista: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Título revista abreviado: | Phys Lett Sect B Nucl Elem Part High-Energy Phys |
ISSN: | 03702693 |
CODEN: | PYLBA |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v698_n5_p325_Multitudinario |