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Title: Transverse single-spin asymmetry of midrapidity π 0 and η mesons in p + Au and p + Al collisions at s N N = 200 GeV

Journal Article · · Physical Review. D.
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Presented are the first measurements of the transverse single-spin asymmetries ($$A_N$$) for neutral pions and eta mesons in $$\textit{p}$$ + Au and $$\textit{p}$$ + Al collisions at $$\sqrt{s_{NN}}$$ = 200 GeV in the pseudorapidity range |$$\textit{η}$$| < 0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in $$\textit{p}$$ + $$\textit{p}$$ collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
PHENIX Collaboration
Grant/Contract Number:
SC0012704; FG02-96ER40982; AC05-00OR22725
OSTI ID:
1984531
Alternate ID(s):
OSTI ID: 1984788; OSTI ID: 2007767; OSTI ID: 2323997
Report Number(s):
BNL-224511-2023-JAAM; PRVDAQ; 112004
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Vol. 107 Journal Issue: 11; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized p + p collisions at s = 200 GeV journal February 2021
PHENIX calorimeter
  • Aphecetche, L.; Awes, T. C.; Banning, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 2-3 https://doi.org/10.1016/S0168-9002(02)01954-X
journal March 2003
Calculating TMDs of a large nucleus: Quasi-classical approximation and quantum evolution journal February 2016
Single spin asymmetry scaling in the forward rapidity region at RHIC journal August 2011
Color entanglement for γ -jet production in polarized p A collisions journal November 2014
Odderon mechanism for transverse single spin asymmetry in the Wandzura-Wilczek approximation journal December 2022
Extra spin asymmetries from the breakdown of transverse-momentum-dependent factorization in hadron-hadron collisions journal July 2013
Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p ↑  +  p collisions at s = 500  GeV journal May 2018
Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p + A Collisions at s N N = 200 GeV journal January 2018
Erratum: New mechanism for generating a single transverse spin asymmetry [Phys. Rev. D 86 , 034028 (2012)] journal October 2012
Transverse spin effects in hard semi-inclusive collisions journal September 2020
Transverse single spin asymmetry in direct photon production in polarized p A collisions journal August 2014
Improving constraints on gluon spin-momentum correlations in transversely polarized protons via midrapidity open-heavy-flavor electrons in p+p collisions at s=200GeV journal March 2023
Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized p+p collisions at s=200GeV journal February 2022
Transverse single spin asymmetries of forward neutrons in p+p , p+Al , and p+Au collisions at sNN=200GeV as a function of transverse and longitudinal momenta journal February 2022
Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p + p collisions at s = 200 GeV journal July 2014
Single spin asymmetry in forward p A collisions. II. Fragmentation contribution journal January 2017
Comparison of transverse single-spin asymmetries for forward π 0 production in polarized p p , p Al and p Au collisions at nucleon pair c.m. energy s NN = 200 GeV journal April 2021
Probing Gluon Spin-Momentum Correlations in Transversely Polarized Protons through Midrapidity Isolated Direct Photons in p + p Collisions at s = 200 GeV journal October 2021
Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized pp collisions at s=200GeV journal October 2022
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 s N N = 200 GeV journal September 2019
No generalized transverse momentum dependent factorization in the hadroproduction of high transverse momentum hadrons journal May 2010
New mechanism for generating a single transverse spin asymmetry journal August 2012
Transverse single spin asymmetry in Drell-Yan production in polarized pA collisions journal July 2015
Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s = 500 GeV journal February 2018
Single spin asymmetries in forward p p / A collisions revisited: The role of color entanglement journal August 2017
Single spin asymmetry in forward p A collisions journal September 2016
Single spin asymmetry in forward p A collisions: Phenomenology at RHIC journal May 2019
Transverse single-spin asymmetries of midrapidity π 0 and η mesons in polarized p + p collisions at s = 200 GeV journal March 2021
Lensing mechanism meets small- x physics: Single transverse spin asymmetry in p + p and p + A collisions journal July 2020
Measurement of transverse single-spin asymmetries of π 0 and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions journal May 2021

Figures / Tables (3)