Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized $p+p$ collisions at $\sqrt{s}=200$ GeV - INSPIRE

DataBETA

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized $p+p$ collisions at $\sqrt{s}=200$ GeV

STAR

Collaboration

May, 2012

18 pages

Published in:

Phys.Rev.D 86 (2012) 032006

e-Print:

1205.2735 [nucl-ex]

DOI:

10.1103/PhysRevD.86.032006

Experiments:

BNL-RHIC-STAR

View in:

reference search124 citations

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Abstract: (arXiv)

We report STAR measurements of the longitudinal double-spin asymmetry A_LL, the transverse single-spin asymmetry A_N, and the transverse double-spin asymmetries A_Sigma and A_TT for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt{s} = 200 GeV. The data represent integrated luminosities of 7.6 /pb with longitudinal polarization and 1.8 /pb with transverse polarization, with 50-55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A_N, A_Sigma, or A_TT at mid-rapidity. Recent model calculations indicate the A_N results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A_LL significantly improves the knowledge of gluon polarization in the nucleon.

Note:

18 pages, 16 figures, 8 tables

13.88.+e
13.87.Ce
14.20.Dh
21.10.Gv
p p: inclusive reaction
polarized beam: longitudinal
polarized beam: transverse
rapidity: central region
jet: hadroproduction
jet: transverse momentum

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