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Title: New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem

We present a new collinear twist-3 analysis of the transverse SSA A N at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e +e annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-P T processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of A N in pp → hX and its inclusion could provide a solution for the sign-mismatch problem.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Temple Univ., Philadelphia, PA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Niigata Univ., Niigata (Japan)
Publication Date:
Report Number(s):
BNL-108591-2015-JA
Journal ID: ISSN 0177-7963; R&D Project: PO-3
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Few-Body Systems
Additional Journal Information:
Journal Volume: 56; Journal Issue: 6-9; Journal ID: ISSN 0177-7963
Publisher:
Springer
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
RIKEN
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; single-spin asymmetries; collinear factorization; twist-3 fragmentation
OSTI Identifier:
1228859

Kanazawa, Koichi, Pitonyak, Daniel, Koike, Yuji, and Metz, Andreas. New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem. United States: N. p., Web. doi:10.1007/s00601-014-0913-4.
Kanazawa, Koichi, Pitonyak, Daniel, Koike, Yuji, & Metz, Andreas. New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem. United States. doi:10.1007/s00601-014-0913-4.
Kanazawa, Koichi, Pitonyak, Daniel, Koike, Yuji, and Metz, Andreas. 2014. "New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem". United States. doi:10.1007/s00601-014-0913-4. https://www.osti.gov/servlets/purl/1228859.
@article{osti_1228859,
title = {New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem},
author = {Kanazawa, Koichi and Pitonyak, Daniel and Koike, Yuji and Metz, Andreas},
abstractNote = {We present a new collinear twist-3 analysis of the transverse SSA AN at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e+e– annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-PT processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of AN in pp↑ → hX and its inclusion could provide a solution for the sign-mismatch problem.},
doi = {10.1007/s00601-014-0913-4},
journal = {Few-Body Systems},
number = 6-9,
volume = 56,
place = {United States},
year = {2014},
month = {10}
}