Transverse single-spin asymmetries of midrapidity $\pi^0$ and $\eta$ mesons in polarized $p+p$ collisions at $\sqrt{s}=200$ GeV - INSPIRE

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Transverse single-spin asymmetries of midrapidity $\pi^0$ and $\eta$ mesons in polarized $p+p$ collisions at $\sqrt{s}=200$ GeV

PHENIX

Collaboration

Nov 28, 2020

10 pages

Published in:

Phys.Rev.D 103 (2021) 5, 052009

Published: Mar 23, 2021

e-Print:

2011.14170 [hep-ex]

DOI:

10.1103/PhysRevD.103.052009

Experiments:

BNL-RHIC-PHENIX

View in:

reference search17 citations

Citations per year

Abstract: (APS)

We present a measurement of the transverse single-spin asymmetry for

\pi^0

and

\eta

mesons in

p^\uparrow

+

p

collisions in the pseudorapidity range

|\eta|<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 a factor of 3 smaller uncertainties. As hadrons,

\pi^0

and

\eta

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.

Note:

314 authors from 66 institutions, 10 pages, 5 figures, 2 tables, 2015 data. v2 is version accepted for publication in Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

Particle Physics Experiments
p p: scattering
p p: colliding beams
p: polarized beam
effect: nonperturbative
effect: strangeness
polarization: transverse
spin: asymmetry
pi0
eta

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