“T-odd effects” in unpolarized Drell–Yan scattering

Gamberg, Leonard P.; Goldstein, Gary R.

doi:10.1016/j.physletb.2007.05.043

“T-odd effects” in unpolarized Drell–Yan scattering

Journal Article · Sat May 26 00:00:00 EDT 2007 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2007.05.043· OSTI ID:2588222

Gamberg, Leonard P. ^[1]; Goldstein, Gary R. ^[2]

Penn State-Berks, Reading, PA (United States)
Tufts University, Medford, MA (United States)

We consider the leading twist “T-odd” contributions as the dominant source of the cos 2φ azimuthal asymmetry in unpolarized $$p\bar{p}$$ → μ⁻ μ⁺X di-lepton production in Drell–Yan scattering. This asymmetry contains information on the distribution of quark transverse spin in an unpolarized proton. In a parton-spectator framework we estimate these asymmetries at 50 GeV center of mass energy. This azimuthal asymmetry is interesting in light of proposed experiments at GSI, where an anti-proton beam is ideal for studying the transversity properties of quarks due to the dominance of valence quark effects.

View Accepted Manuscript (DOE)

Research Organization:: Penn State-Berks, Reading, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-07ER41460; FG02-92ER40702

OSTI ID:: 2588222

Alternate ID(s):: OSTI ID: 21007156

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: 5-6 Vol. 650; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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