Single-spin asymmetry of production in , Al, and Au collisions with transversely polarized proton beams at GeV
Collaboration
11 pages
Published in:
- Phys.Rev.D 98 (2018) 1, 012006
- Published: Jul 31, 2018
e-Print:
- 1805.01491 [hep-ex]
Experiments:
View in:
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Abstract: (APS)
We report the transverse single-spin asymmetries of J/ψ production at forward and backward rapidity, 1.2<|y|<2.2, as a function of J/ψ transverse momentum (pT) and Feynman-x (xF). The data analyzed were recorded by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2015 from p+p, p+Al, and p+Au collisions with transversely polarized proton beams at sNN=200 GeV. At this collision energy, single-spin asymmetries for heavy-flavor particle production of p+p collisions provide access to the spin-dependent gluon distribution and higher-twist correlation functions inside the nucleon, such as the gluon Qiu-Sterman and trigluon correlation functions. Proton+nucleus collisions offer an excellent opportunity to study nuclear effects on the correlation functions. The data indicate a positive asymmetry at the two-standard-deviation level in the p+p data for 2 GeV/cNote:
- 294 authors from 64 institutions, 11 pages, 5 figures, and 4 tables. v2 is version accepted for publication in Physical Review 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
- p p: colliding beams
- heavy ion: colliding beams
- spin: asymmetry
- J/psi(3100): production
- p: polarization
- polarization: transverse
- gluon: distribution function
- spin: correlation
- correlation function: (twist)
- rapidity dependence
References(61)
Figures(6)
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