Measurement of the p(p)over-bar -> W plus b plus X production cross section at root s=1.96 TeV D0 Collaboration
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
29/01/2013
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Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) We present a measurement of the cross section for W boson production in association with at least one b-quark jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1 fb(-1) recorded with the DO detector at the Fermilab Tevatron p (p) over bar Collider at root s = 1.96 TeV. We measure an inclusive cross section of sigma(W(-> mu nu) + b + X) = 1.04 +/- 0.05 (stat.) +/- 0.12 (syst.) pb and sigma(W (-> e nu) + b + X) = 1.00 +/- 0.04 (stat.) +/- 0.12 (syst.) pb in the phase space defined by p(T)(nu) > 25 GeV, p(T)(b-jet) > 20 GeV, vertical bar eta(b-jet)vertical bar < 1.1, and a muon (electron) with p(T)(l) > 20 GeV and vertical bar eta(mu)vertical bar < 1.7 (vertical bar eta(e)vertical bar < 1.1 or 1.5 < vertical bar eta(e)vertical bar < 2.5). The combined result per lepton family is sigma(W(-> l nu) + b + X) = 1.05 +/- 0.12 (stat. + syst.) pb for vertical bar eta(l)vertical bar < 1.7. The results are in agreement with predictions from next-to-leading order QCD calculations using MCFM, sigma (W + b) B(W -> l nu) = 1.34(-0.34)(+0.41) (syst.) pb, and also with predictions from the SHERPA and MADGRAPH Monte Carlo event generators. Published by Elsevier B.V. |
Formato |
1314-1320 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2012.12.044 Physics Letters B. Amsterdam: Elsevier Science Bv, v. 718, n. 4-5, p. 1314-1320, 2013. 0370-2693 http://hdl.handle.net/11449/111505 10.1016/j.physletb.2012.12.044 WOS:000314554300017 WOS000314554300017.pdf |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Physics Letters B |
Direitos |
openAccess |
Tipo |
info:eu-repo/semantics/article |