Single-spin asymmetries at two loops
Abstract
We find a novel mechanism for generating transverse single-spin asymmetry (SSA) in semi-inclusive deep inelastic scattering, distinct from the known ones which involve the Sivers and Collins functions, or their collinear twist-three counterparts. It is demonstrated that a phase needed for SSA can be produced purely within a parton-level cross section starting at two loops. We identify the complete set of two-loop diagrams for SSA, and discuss their gauge invariance and collinear factorization which features the gT distribution function. In the kT factorization framework, many more sources for SSA exist, and contributions from all possible two-parton transverse-momentum-dependent parton distribution functions are presented up to two loops and twist three.
- Authors:
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1575303
- Alternate Identifier(s):
- OSTI ID: 1575916
- Report Number(s):
- BNL-212365-2019-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 094027
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 9; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Benić, Sanjin, Hatta, Yoshitaka, Li, Hsiang-nan, and Yang, Dong-Jing. Single-spin asymmetries at two loops. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.094027.
Benić, Sanjin, Hatta, Yoshitaka, Li, Hsiang-nan, & Yang, Dong-Jing. Single-spin asymmetries at two loops. United States. doi:10.1103/PhysRevD.100.094027.
Benić, Sanjin, Hatta, Yoshitaka, Li, Hsiang-nan, and Yang, Dong-Jing. Fri .
"Single-spin asymmetries at two loops". United States. doi:10.1103/PhysRevD.100.094027.
@article{osti_1575303,
title = {Single-spin asymmetries at two loops},
author = {Benić, Sanjin and Hatta, Yoshitaka and Li, Hsiang-nan and Yang, Dong-Jing},
abstractNote = {We find a novel mechanism for generating transverse single-spin asymmetry (SSA) in semi-inclusive deep inelastic scattering, distinct from the known ones which involve the Sivers and Collins functions, or their collinear twist-three counterparts. It is demonstrated that a phase needed for SSA can be produced purely within a parton-level cross section starting at two loops. We identify the complete set of two-loop diagrams for SSA, and discuss their gauge invariance and collinear factorization which features the gT distribution function. In the kT factorization framework, many more sources for SSA exist, and contributions from all possible two-parton transverse-momentum-dependent parton distribution functions are presented up to two loops and twist three.},
doi = {10.1103/PhysRevD.100.094027},
journal = {Physical Review D},
number = 9,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}
DOI: 10.1103/PhysRevD.100.094027
Web of Science
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