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

Leonard P. Gamberg; Gary R. Goldstein

doi:10.1016/j.physletb.2007.05.043

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

Leonard P. Gamberg, Gary R. Goldstein

Division of Science (Berks)

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	362-368
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	650
Issue number	5-6
DOIs	https://doi.org/10.1016/j.physletb.2007.05.043
State	Published - Jul 12 2007

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2007.05.043

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title = "{"}T-odd effects{"} in unpolarized Drell-Yan scattering",

abstract = "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.",

author = "Gamberg, {Leonard P.} and Goldstein, {Gary R.}",

note = "Funding Information: We thank Daniel Boer, Karo Oganessyan and Jen-Chieh Peng for useful discussions. This work is supported in part by the US Department of Energy under contracts, DE-FG02-07ER41460 (LG), and DE-FG02-92ER40702 (GRG).",

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doi = "10.1016/j.physletb.2007.05.043",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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T1 - "T-odd effects" in unpolarized Drell-Yan scattering

AU - Gamberg, Leonard P.

AU - Goldstein, Gary R.

N1 - Funding Information: We thank Daniel Boer, Karo Oganessyan and Jen-Chieh Peng for useful discussions. This work is supported in part by the US Department of Energy under contracts, DE-FG02-07ER41460 (LG), and DE-FG02-92ER40702 (GRG).

PY - 2007/7/12

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N2 - 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.

AB - 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.

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SN - 0370-2693

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 5-6

ER -

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

Abstract

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