Indication on the process dependence of the sivers effect

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We analyze the spin asymmetry for single inclusive jet production in proton-proton collisions collected by the AnDY experiment at the Relativistic Heavy Ion Collider and the Sivers asymmetry data from semi-inclusive deep inelastic scattering experiments. In particular, we consider the role color gauge invariance plays in determining the process dependence of the Sivers effect. We find that after carefully taking into account the initial-state and final-state interactions between the active parton and the remnant of the polarized hadron, the calculated jet spin asymmetry based on the Sivers functions extracted from HERMES and COMPASS experiments is consistent with the AnDY experimental data. This provides a first indication for the process dependence of the Sivers effect in these processes. We also make predictions for both direct photon and Drell-Yan spin asymmetry, to further test the process dependence of the Sivers effect in future experiments.

Original languageEnglish (US)
Article number232301
JournalPhysical Review Letters
Volume110
Issue number23
DOIs
StatePublished - Jun 4 2013

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indication
asymmetry
COMPASS (programming language)
protons
gauge invariance
partons
heavy ions
inelastic scattering
color
collisions
photons
predictions
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Indication on the process dependence of the sivers effect",
abstract = "We analyze the spin asymmetry for single inclusive jet production in proton-proton collisions collected by the AnDY experiment at the Relativistic Heavy Ion Collider and the Sivers asymmetry data from semi-inclusive deep inelastic scattering experiments. In particular, we consider the role color gauge invariance plays in determining the process dependence of the Sivers effect. We find that after carefully taking into account the initial-state and final-state interactions between the active parton and the remnant of the polarized hadron, the calculated jet spin asymmetry based on the Sivers functions extracted from HERMES and COMPASS experiments is consistent with the AnDY experimental data. This provides a first indication for the process dependence of the Sivers effect in these processes. We also make predictions for both direct photon and Drell-Yan spin asymmetry, to further test the process dependence of the Sivers effect in future experiments.",
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Indication on the process dependence of the sivers effect. / Gamberg, Leonard; Kang, Zhong Bo; Prokudin, Alexei.

In: Physical Review Letters, Vol. 110, No. 23, 232301, 04.06.2013.

Research output: Contribution to journalArticle

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