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Nuclear Dependence of the Transverse Single-Spin Asymmetry in the Production of Charged Hadrons at Forward Rapidity in Polarized p+p , p+Al , and p+Au Collisions at sNN=200 GeV
- Source :
- Physical Review Letters
- Publication Year :
- 2019
- Publisher :
- American Physical Society (APS), 2019.
-
Abstract
- We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively charged hadrons in polarized p↑+p, p↑+Al, and p↑+Au collisions at sNN=200 GeV. The measurements have been performed at forward rapidity (1.4<η<2.4) over the range of transverse momentum (1.8<pT<7.0 GeV/c) and Feynman x (0.1<xF<0.2). We observed positive asymmetries for positively charged hadrons in p↑+p collisions, and significantly reduced asymmetries in p↑+A collisions. These results reveal a nuclear dependence of TSSAs for charged-hadron production in a regime where perturbative techniques are applicable. These results provide new opportunities to use p↑+A collisions as a tool to investigate the rich phenomena behind TSSAs in hadronic collisions and to use TSSAs as a new handle in studying small-system collisions.
- Subjects :
- Physics
media_common.quotation_subject
Nuclear Theory
Hadron
General Physics and Astronomy
01 natural sciences
Asymmetry
Nuclear physics
Momentum
Transverse plane
0103 physical sciences
High Energy Physics::Experiment
Rapidity
Nuclear Experiment
010306 general physics
Spin (physics)
media_common
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 123
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....02f3086345ea2ac29b8ebf8a1c3be2fe