Single transverse-spin asymmetry in Drell-Yan production at large and moderate transverse momentum

Journal Article · Mon May 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.73.094017· OSTI ID:20782992

Xiangdong, Ji ^[1]; Jianwei, Qiu ^[2]; Vogelsang, Werner ^[3]; Feng, Yuan ^[4]

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1. Physics Department, University of Maryland, College Park, Maryland 20742 (United States)
2. Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
3. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
4. RIKEN BNL Research Center, Building 510A, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We study the single-transverse-spin asymmetry for the Drell-Yan process. We consider production of the lepton pair at large transverse momentum, q{sub perpendicular}{approx}Q, where Q is the pair's mass. The spin asymmetry is then of higher twist and may be generated by twist-three quark-gluon correlation functions. Expanding the result for q{sub perpendicular}<<Q, we make contact with the transverse-momentum-dependent QCD factorization involving the so-called Sivers functions. We find that the two mechanisms, quark-gluon correlations on one hand and the Sivers effect on the other, contain the same physics in this region. This ties the two together and imposes an important constraint on phenomenological studies of single-transverse-spin asymmetries.

• OSTI ID: 20782992
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CORRELATION FUNCTIONS
CORRELATIONS
DRELL MODEL
FACTORIZATION
GLUONS
INCLUSIVE INTERACTIONS
LEPTONS
QUANTUM CHROMODYNAMICS
QUARKS
REST MASS
SPIN
TRANSVERSE MOMENTUM