Transverse single-spin asymmetries of midrapidity π0 and η mesons in polarized p+p collisions at s =200 GeV

(PHENIX Collaboration)

Research output: Contribution to journalArticlepeer-review

Abstract

We present a measurement of the transverse single-spin asymmetry for π0 and η mesons in p↑+p collisions in the pseudorapidity range |η|<0.35 and at a center-of-mass energy of 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. In comparison with previous measurements in this kinematic region, these results have factor-of-3-smaller uncertainties. As hadrons, π0 and η mesons are sensitive to both initial- and final-state nonperturbative effects for a mix of parton flavors. Comparisons of the differences in their transverse single-spin asymmetries have the potential to disentangle the possible effects of strangeness, isospin, or mass. These results can constrain the twist-3 trigluon collinear correlation function as well as the gluon Sivers function.

Original languageEnglish (US)
Article number052009
JournalPhysical Review D
Volume103
Issue number5
DOIs
StatePublished - Mar 22 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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