Measurement of angular distributions of Drell-Yan dimuons in p+d interaction at 800 GeV/c.

Conference · Fri Aug 24 04:00:00 EDT 2007 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.99.082301· OSTI ID:982028

Peng, J C; Zhu, L Y; Reimer, P E

We report a measurement of the angular distributions of Drell-Yan dimuons produced using an 800 GeV/c proton beam on a deuterium target. The muon angular distributions in the dilepton rest frame have been measured over the kinematic range 4.5<m{sub u}{sub u}<15 GeV/c2, 0<pT<4 GeV/c, and 0<xF<0.8. No significant cos2 dependence is found in these proton-induced Drell-Yan data, in contrast with the situation for pion-induced Drell-Yan data. The data are compared with expectations from models which attribute the cos2 distribution to a QCD vacuum effect or to the presence of the transverse-momentum-dependent Boer-Mulders structure function h1. Constraints on the magnitude of the sea-quark h1 structure functions are obtained.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 982028
• Report Number(s): ANL/PHY/CP-60057
• Conference Information: Journal Name: Phys. Rev. Lett. Journal Issue: 8 ; Aug. 24, 2007 Journal Volume: 99
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
DATA
DEUTERIUM TARGET
DISTRIBUTION
INTERACTIONS
MEETINGS
MUONS
NUCLEAR PHYSICS
PROTON BEAMS
QUANTUM CHROMODYNAMICS
RANGE
STRUCTURE FUNCTIONS