Transverse single spin asymmetry for very forward π⁰ production in polarized proton-proton collisions at √(s) = 510 GeV

2019/02/21 by Kim, M. H., Hong, B., Goto, Y. +19
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.1902.07852

Abstract

Transverse single spin asymmetry, A_N, of very forward π⁰ production from polarized p + p collisions provides new information toward an understanding of its production mechanism. A_N of forward π⁰ in the pseudorapidity region of 3 < η< 4 has been described by the partonic structure of the proton in the perturbative QCD framework. However, recent data indicates a potential contribution from not only partonic but also diffractive interactions. In order to provide a new insight on the origin of the A_N, we measured the very forward π⁰ production in the pseudorapidity region of 6 < η from √(s) = 510 GeV polarized p + p collisions at RHIC in 2017. We report our measurement of the very forward π⁰ over the transverse momentum range of 0 < p_T < 1 GeV/c and the preliminary result.

Related

• Measurement of the Transverse Single-Spin Asymmetry for Mid-rapidity Production of Neutral Pions in Polarized p+p Collisions at 200 GeV Center-of-Mass Energy
• Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √(s)=200 and 62.4 GeV
• Semiclassical mechanism for single-spin asymmetry in π⁰-production
• Double Helicity Asymmetry in π⁰ Production at Midrapidity in Polarized p+p Collisions at √(s)=510 GeV
• Spin Effects in Forward pi⁰-production in Polarized Proton-Proton Collisions at STAR