Transverse single-spin asymmetries: Challenges and recent progress

Metz, Andreas; Pitonyak, Daniel; Schafer, Andreas; Schlegel, Marc; Vogelsang, Werner; Zhou, Jian

doi:10.1007/s00601-014-0929-9

Title: Transverse single-spin asymmetries: Challenges and recent progress

Journal Article · Tue Nov 25 00:00:00 EST 2014 · Few-Body Systems

DOI:https://doi.org/10.1007/s00601-014-0929-9· OSTI ID:1228858

Metz, Andreas ^[1]; Pitonyak, Daniel ^[2]; Schafer, Andreas ^[3]; Schlegel, Marc ^[4]; Vogelsang, Werner ^[4]; Zhou, Jian ^[3]

Temple Univ., Philadelphia, PA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Regensburg Univ., Regensburg (Germany)
Tubingen Univ., Tubingen (Germany)

In this study, transverse single-spin asymmetries are among the most intriguing observables in hadronic physics. Though such asymmetries were already measured for the first time about four decades ago, their origin is still under debate. Here we consider transverse single-spin asymmetries in semi-inclusive lepton–nucleon scattering, in nucleon–nucleon scattering, and in inclusive lepton–nucleon scattering. It is argued that, according to recent work, the single-spin asymmetries for those three processes may be simultaneously described in perturbative QCD, where the re-scattering of the active partons plays a crucial role. A comparison of single-spin asymmetries in different reactions can also shed light on the universality of transverse momentum dependent parton correlation functions. In particular, we discuss what existing data may tell us about the predicted process dependence of the Sivers function.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: RIKEN

Grant/Contract Number:: SC00112704

OSTI ID:: 1228858

Report Number(s):: BNL-108590-2015-JA; R&D Project: PO-3

Journal Information:: Few-Body Systems, Vol. 56, Issue 6-9; ISSN 0177-7963

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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