First measurement of W boson production in association with a single charm quark in pp¯ collisions at s=1.96 TeV

Aaltonen, T., Adelman, J., Akimoto, T., Albrow, M., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J. et al.
). (2008) First measurement of W boson production in association with a single charm quark in pp¯ collisions at s=1.96 TeV. Physical Review Letters, Vol.100 (No.9). Article: 091803. doi:10.1103/PhysRevLett.100.091803 ISSN 0031-9007.

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Abstract

We present the first measurement of the production cross section of a W boson with a single charm quark (c) in pp¯ collisions at √s=1.96  TeV, using soft muon tagging of c jets. In a data sample of ∼1.8  fb-1, recorded with the Collider Detector at Fermilab II detector at the Fermilab Tevatron, we select events with W+1 or 2 jets. We use the charge correlation between the W and the muon from the semileptonic decay of a charm hadron to extract the Wc signal. We measure σWc(pTc>20  GeV/c,|ηc|<1.5)×BR(W→ℓν)=9.8±3.2  pb, in agreement with theoretical expectations.

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