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 p (p) over bar collisions recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily due to the Compton scattering process cg-->cgamma, 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.

T., A., H., A., A., A., M. G., A., P., A., D., A., et al. (2002). Cross section and heavy quark composition of gamma+mu events produced in p(p)over-bar collisions. PHYSICAL REVIEW D, 65(1) [10.1103/PhysRevD.65.012003].

Cross section and heavy quark composition of gamma+mu events produced in p(p)over-bar collisions

A. Cerri;PAOLETTI, RICCARDO;
2002-01-01

Abstract

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 p (p) over bar collisions recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily due to the Compton scattering process cg-->cgamma, 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.
2002
T., A., H., A., A., A., M. G., A., P., A., D., A., et al. (2002). Cross section and heavy quark composition of gamma+mu events produced in p(p)over-bar collisions. PHYSICAL REVIEW D, 65(1) [10.1103/PhysRevD.65.012003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/39836
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