Comparison of transverse single-spin asymmetries for forward π0 production in polarized pp, pAl and pAu collisions at nucleon pair c.m. energy sNN =200 GeV
Funding Sponsor
National Science Foundation
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https://doi.org/10.1103/PhysRevD.103.072005
Document Type
Research Article
Publication Title
Physical Review D
Publication Date
4-16-2021
doi
10.1103/PhysRevD.103.072005
Abstract
The STAR collaboration reports a measurement of the transverse single-spin asymmetries, AN, for neutral pions produced in polarized proton collisions with protons (pp), with aluminum nuclei (pAl) and with gold nuclei (pAu) at a nucleon-nucleon center-of-mass energy of 200 GeV. Neutral pions are observed in the forward direction relative to the transversely polarized proton beam, in the pseudorapidity region 2.7<η<3.8. Results are presented for π0s observed in the STAR forward meson spectrometer electromagnetic calorimeter in narrow Feynman x (xF) and transverse momentum (pT) bins, spanning the range 0.172.5 GeV/c. It is further observed that the value of AN is significantly larger for events with a large-pT isolated π0 than for events with a nonisolated π0 accompanied by additional jetlike fragments. The nuclear dependence r(A) is similar for isolated and nonisolated π0 events.
Recommended Citation
APA Citation
Adam, J.
Adamczyk, L.
Adams, J.
Adkins, J.
...
(2021). Comparison of transverse single-spin asymmetries for forward π0 production in polarized pp, pAl and pAu collisions at nucleon pair c.m. energy sNN =200 GeV. Physical Review D, 103(7),
10.1103/PhysRevD.103.072005
https://fount.aucegypt.edu/faculty_journal_articles/2405
MLA Citation
Adam, J., et al.
"Comparison of transverse single-spin asymmetries for forward π0 production in polarized pp, pAl and pAu collisions at nucleon pair c.m. energy sNN =200 GeV." Physical Review D, vol. 103,no. 7, 2021,
https://fount.aucegypt.edu/faculty_journal_articles/2405