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Title: Testing the process dependence of the Sivers function via hadron distributions inside a jet

Abstract

We study the process dependence of the Sivers function by considering the impact of color-gauge invariant initial and final state interactions on transverse spin asymmetries in proton-proton scattering reactions within the framework of the transverse momentum dependent (TMD), generalized parton model. To this aim, we consider the azimuthal distribution of leading pions inside a fragmenting jet as well as single inclusive jet asymmetry in polarized proton-proton collisions. In contrast to single inclusive pion production, in both cases we can isolate the Sivers contribution and thereby study its process dependence. The predictions for the Sivers asymmetry obtained with and without inclusion of color gauge factors are comparable in size but with opposite signs. We conclude that both processes represent unique opportunities to discriminate among the two approaches and test the universality properties of the Sivers function in hadronic scattering reactions.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Riken BNL Research Center
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1050420
Report Number(s):
BNL-96838-2012-JA
Journal ID: ISSN 0370-2693; R&D Project: PO-3; TRN: US1204638
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Volume: 704; Journal Issue: 5; Journal ID: ISSN 0370-2693
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; COLOR; DISTRIBUTION; FINAL-STATE INTERACTIONS; HADRONS; PIONS; PRODUCTION; SCATTERING; SPIN; TESTING; TRANSVERSE MOMENTUM; riken bnl research center

Citation Formats

D, Alesio U, Kang, Z, Gamberg, L, Murgia, F, and Pisano, C. Testing the process dependence of the Sivers function via hadron distributions inside a jet. United States: N. p., 2011. Web. doi:10.1016/j.physletb.2011.09.067.
D, Alesio U, Kang, Z, Gamberg, L, Murgia, F, & Pisano, C. Testing the process dependence of the Sivers function via hadron distributions inside a jet. United States. doi:10.1016/j.physletb.2011.09.067.
D, Alesio U, Kang, Z, Gamberg, L, Murgia, F, and Pisano, C. Thu . "Testing the process dependence of the Sivers function via hadron distributions inside a jet". United States. doi:10.1016/j.physletb.2011.09.067.
@article{osti_1050420,
title = {Testing the process dependence of the Sivers function via hadron distributions inside a jet},
author = {D, Alesio U and Kang, Z and Gamberg, L and Murgia, F and Pisano, C},
abstractNote = {We study the process dependence of the Sivers function by considering the impact of color-gauge invariant initial and final state interactions on transverse spin asymmetries in proton-proton scattering reactions within the framework of the transverse momentum dependent (TMD), generalized parton model. To this aim, we consider the azimuthal distribution of leading pions inside a fragmenting jet as well as single inclusive jet asymmetry in polarized proton-proton collisions. In contrast to single inclusive pion production, in both cases we can isolate the Sivers contribution and thereby study its process dependence. The predictions for the Sivers asymmetry obtained with and without inclusion of color gauge factors are comparable in size but with opposite signs. We conclude that both processes represent unique opportunities to discriminate among the two approaches and test the universality properties of the Sivers function in hadronic scattering reactions.},
doi = {10.1016/j.physletb.2011.09.067},
journal = {Physics Letters B},
issn = {0370-2693},
number = 5,
volume = 704,
place = {United States},
year = {2011},
month = {9}
}