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

Leonard Gamberg, Zhong Bo Kang

Research output: Contribution to journalArticle

38 Scopus citations


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 π0 and direct photon productions at RHIC energies. We find the predictions are opposite to those in the conventional GPM approach.

Original languageEnglish (US)
Pages (from-to)109-118
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - Jan 24 2011


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this