A Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes

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dc.creatorJi, Xiangdong
dc.creatorQiu, Jian-Wei
dc.creatorVogelsang, Werner
dc.creatorYuan, Feng
dc.date2006-02-28
dc.date.accessioned2026-07-07T10:44:49Z
dc.date.available2026-07-07T10:44:49Z
dc.descriptionUsing Drell-Yan pair production as an example, we explore the relation between two well-known mechanisms for single transverse-spin asymmetries in hard processes: twist-three quark-gluon correlations when the pair's transverse momentum is large, $q_\perp \gg Λ_{\rm QCD}$, and time-reversal-odd and transverse-momentum-dependent parton distributions when $q_\perp$ is much less than the pair's mass. We find that although the two mechanisms have their own domain of validity, they describe the same physics in the kinematic region where they overlap. This unifies the two mechanisms and imposes an important constraint on phenomenological studies of single spin asymmetries.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0602239
dc.identifierhttp://arxiv.org/abs/hep-ph/0602239
dc.identifierPhys.Rev.Lett.97:082002,2006
dc.identifierdoi:10.1103/PhysRevLett.97.082002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182728
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes
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