Measurement of the ratio of the p(p)over-bar -> W + c-jet cross section to the inclusive p(p)over-bar -> W + jets cross section
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
07/08/2008
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Resumo |
We present a measurement of the fraction of inclusive W +jets events produced with net charm quantum number 11, denoted W + c-jet, in p collisions at root s = 1.96 TeV using approximately 1 fb(-1) of data collected by the do detector at the Fermilab Tevatron Collider. We identify the W +jets events via the leptonic W boson decays. Candidate W + c-jet events are selected by requiring a jet containing a muon in association with a reconstructed W boson and exploiting the charge correlation between this muon and W boson decay lepton to perform a nearly model-independent background subtraction. We measure the fraction of W + c-jet events in the inclusive W +jets sample for jet PT > 20 GeV and pseudorapidity |eta| < 2.5 to be 0.074 +/- 0.019(stat.) +/-(0.012)(0.014) (syst.), in agreement with theoretical predictions. The probability that background fluctuations could produce the observed fraction of W + c-jet events is estimated to be 2.5 x 10(-4), which corresponds to a 3.5 sigma statistical significance. Published by Elsevier B.V. |
Formato |
23-30 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2008.06.067 Physics Letters B. Amsterdam: Elsevier B.V., v. 666, n. 1, p. 23-30, 2008. 0370-2693 http://hdl.handle.net/11449/24074 10.1016/j.physletb.2008.06.067 WOS:000258724500005 |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Physics Letters B |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |