Scientific article
Open access

Cross section and heavy quark composition of γ+μ events produced in pp collisions

ContributorsCDF Collaboration
Publication date2001

We present a measurement of the cross section and the first measurement of the heavy flavor content of associated direct photon + muon events produced in hadronic collisions. These measurements come from a sample of 1.8 TeV pp¯ collisions recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily due to the Compton scattering process cg⃗ cγ, with the final-state charm quark producing a muon. The cross section for events with a photon transverse momentum between 12 and 40 GeV/c is measured to be 46.8±6.3±7.5 pb, which is two standard deviations below the most recent theoretical calculation. A significant fraction of the events in the sample contain a final-state bottom quark. The ratio of charm to bottom production is measured to be 2.4±1.2, in good agreement with QCD models.

Citation (ISO format)
CDF Collaboration. Cross section and heavy quark composition of <em>γ</em>+<em>μ</em> events produced in <em>pp</em> collisions. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2001, vol. 65, n° 01. doi: 10.1103/PhysRevD.65.012003
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Article (Published version)
ISSN of the journal1550-2368

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