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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
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2008 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 666, no 1, 23-30 p.Article in journal (Refereed) Published
Abstract [en]

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.

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2008. Vol. 666, no 1, 23-30 p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-152134DOI: 10.1016/j.physletb.2008.06.067ISI: 000258724500005OAI: oai:DiVA.org:uu-152134DiVA: diva2:412523
Available from: 2011-04-25 Created: 2011-04-25 Last updated: 2017-12-11Bibliographically approved

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