Measurement of the ratio of pp‾ W + c-jet cross section to the inclusive pp‾ →W + jets cross section

Abazovaj, V. M. ; Abbott, B. ; Mondal, N. K. ; et., al (2008) Measurement of the ratio of pp‾ W + c-jet cross section to the inclusive pp‾ →W + jets cross section Physics Letters B, 666 (1). pp. 23-30. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physletb.2008.06.067

Abstract

We present a measurement of the fraction of inclusive W+jets events produced with net charm quantum number ± 1, denoted W+c-jet, in pp‾ collisions at →s=1.96 TeV using approximately 1 fb-1 of data collected by the DØ 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 |η|<2.5 to be 0.074±0.019(stat.)±0.0120.014, in agreement with theoretical predictions. The probability that background fluctuations could produce the observed fraction of W+c-jet events is estimated to be 2.5×10-4, which corresponds to a 3.5s statistical significance.

Item Type:Article
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ID Code:66842
Deposited On:27 Oct 2011 11:40
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