Measurement of the ratio of the $p \bar{p} \to W^+ c^-$ jet cross section to the inclusive $p \bar{p} \to W +$ jets cross section
(2008) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 666, p. 23 (2008)
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- 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.)±0.0140.012(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 2.5×10−4 , which corresponds to a 3.5 σ statistical significance.
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Tanasijczuk, A. J., D0, & et al. (2008). Measurement of the ratio of the $p \bar{p} \to W^+ c^-$ jet cross section to the inclusive $p \bar{p} \to W +$ jets cross section. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 666, 23. https://doi.org/10.1016/j.physletb.2008.06.067 (Original work published 2008)