Process dependent Sivers function and implications for single spin asymmetry in inclusive hadron production

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2010.11.066· OSTI ID:1003864

Leonard Gamberg, Zhong-Bo Kang

We study the single transverse spin asymmetries in the single inclusive particle production within the framework of the generalized parton model (GPM). By carefully analyzing the initial- and final-state interactions, we include the process-dependence of the Sivers functions into the GPM formalism. The modified GPM formalism has a close connection with the collinear twist-3 approach. Within the new formalism, we make predictions for inclusive $$\pi^0$$ and direct photon productions at RHIC energies. We find the predictions are opposite to those in the conventional GPM approach.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1003864
• Report Number(s): JLAB-THY-10-1116; DOE/OR/23177-1411; arXiv:1009.1936; TRN: US1100532
• Journal Information: Physics Letters B, Vol. 696, Issue 1-2
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
FINAL-STATE INTERACTIONS
HADRONS
PARTICLE PRODUCTION
PHOTONS
PRODUCTION
SPIN