Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

10-20-2014

Journal or Book Title

Physical Review D

Volume

90

Issue

7

First Page

072008

DOI

10.1103/PhysRevD.90.072008

Abstract

We present a measurement of the cross section and transverse single-spin asymmetry (AN) for. mesons at large pseudorapidity from root s = 200 GeV p up arrow + p collisions. The measured cross section for 0.5 < p(T) < 5.0 GeV/c and 3.0 < vertical bar eta vertical bar < 3.8 is well described by a next-to-leading-order perturbative-quantum-chromodynamics calculation. The asymmetries A(N) have been measured as a function of Feynman-x (x(F)) from 0.2 < vertical bar x(F)vertical bar < 0.7, as well as transverse momentum (p(T)) from 1.0 < p(T) < 4.5 GeV/c. The asymmetry averaged over positive x(F) is < A(N)> = 0.061 +/- 0.014. The results are consistent with prior transverse single-spin measurements of forward eta and pi(0) mesons at various energies in overlapping x(F) ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p up arrow + p collisions.

Comments

This is an article from Physical Review D 90 (2014): 072008, doi:10.1103/PhysRevD.90.072008. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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