skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Twist-3 fragmentation effects for A LT in light hadron production from proton-proton collisions

Abstract

Here, we compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., View the MathML sourcep↑p →hX, which can cause a double-spin asymmetry (DSA) A LT. This is a naïve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for A LT in p↑p →hX. However, there are indications that the naïve T-odd transverse single-spin asymmetry (SSA) A N in p↑p→hX is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for A LT. As a result, given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.

Authors:
 [1];  [2];  [1];  [1]
  1. Niigata Univ., Niigata (Japan)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1225992
Alternate Identifier(s):
OSTI ID: 1246797
Report Number(s):
BNL-111973-2016-JA
Journal ID: ISSN 0370-2693; R&D Project: PO-3
Grant/Contract Number:  
SC00112704
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 752; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Riken BNL Research Center; twist-3 effects; spin asymmetries; fragmentation

Citation Formats

Koike, Y., Pitonyak, D., Takagi, Y., and Yoshida, S. Twist-3 fragmentation effects for ALT in light hadron production from proton-proton collisions. United States: N. p., 2015. Web. doi:10.1016/j.physletb.2015.11.014.
Koike, Y., Pitonyak, D., Takagi, Y., & Yoshida, S. Twist-3 fragmentation effects for ALT in light hadron production from proton-proton collisions. United States. doi:10.1016/j.physletb.2015.11.014.
Koike, Y., Pitonyak, D., Takagi, Y., and Yoshida, S. Wed . "Twist-3 fragmentation effects for ALT in light hadron production from proton-proton collisions". United States. doi:10.1016/j.physletb.2015.11.014.
@article{osti_1225992,
title = {Twist-3 fragmentation effects for ALT in light hadron production from proton-proton collisions},
author = {Koike, Y. and Pitonyak, D. and Takagi, Y. and Yoshida, S.},
abstractNote = {Here, we compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., View the MathML sourcep↑p→→hX, which can cause a double-spin asymmetry (DSA) ALT. This is a naïve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for ALT in p↑p→→hX. However, there are indications that the naïve T-odd transverse single-spin asymmetry (SSA) AN in p↑p→hX is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for ALT. As a result, given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.},
doi = {10.1016/j.physletb.2015.11.014},
journal = {Physics Letters. Section B},
number = C,
volume = 752,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2015.11.014

Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

Save / Share: