Journal
PHYSICS LETTERS B
Volume 774, Issue -, Pages 635-642Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2017.10.031
Keywords
Collins asymmetry; Jets; Polarized scattering; Perturbative QCD
Funding
- U.S. Department of Energy [DE-AC05-06OR23177, DE-AC02-05CH11231]
- National Science Foundation [PHY-1623454]
- LDRD Program of Lawrence Berkeley National Laboratory
- Division Of Physics
- Direct For Mathematical & Physical Scien [1623454] Funding Source: National Science Foundation
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We investigate the Collins azimuthal asymmetry of hadrons produced inside jets in transversely polarized proton-proton collisions. Recently, the quark transversity distributions and the Collins fragmentation functions have been extracted within global analyses from data of the processes semi-inclusive deep inelastic scattering and electron-positron annihilation. We calculate the Collins azimuthal asymmetry for charged pions inside jets using these extractions for RHIC kinematics at center-of-mass energies of 200 and 500 GeV. We compare our results with recent data from the STAR Collaboration at RHIC and find good agreement, which confirms the universality of the Collins fragmentation functions. In addition, we further explore the impact of transverse momentum dependent evolution effects. (c) 2017 The Author(s). Published by Elsevier B.V.
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