Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

1-2009

Journal or Book Title

Physical Review D

Volume

79

Issue

1

First Page

012003

DOI

10.1103/PhysRevD.79.012003

Abstract

The PHENIX experiment presents results from the RHIC 2006 run with polarized p + p collisions at root s = 62.4 GeV, for inclusive pi(0) production at midrapidity. Unpolarized cross section results are measured for transverse momenta p(T) = 0.5 to 7 GeV/c. Next-to-leading order perturbative quantum chromodynamics calculations are compared with the data, and while the calculations are consistent with the measurements, next-to-leading logarithmic corrections improve the agreement. Double helicity asymmetries A(LL) are presented for p(T) = 1 to 4 GeV/c and probe the higher range of Bjorken x of the gluon (x(g)) with better statistical precision than our previous measurements at root s = 200 GeV. These measurements are sensitive to the gluon polarization in the proton for 0.06 < x(g) < 0.4.

Comments

This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Inclusive cross section and double helicity asymmetry for π 0 production in p+ p collisions at s= 62.4 GeV." Physical Review D 79, no. 1 (2009): 012003. DOI:10.1103/PhysRevD.79.012003. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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