"T-odd effects" in unpolarized Drell-Yan scattering

Leonard P. Gamberg, Gary R. Goldstein

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


We consider the leading twist "T-odd" contributions as the dominant source of the cos 2 φ{symbol} azimuthal asymmetry in unpolarized p over(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.

Original languageEnglish (US)
Pages (from-to)362-368
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number5-6
StatePublished - Jul 12 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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