Title

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at s√=200  GeV

Authors

Adam Gibson-Even, Valparaiso University
Shirvel Stanislaus, Valparaiso University
Donald Koetke, Valparaiso University
STAR Collaboration

Document Type

Article

Publication Date

8-2015

Abstract

We report a new measurement of the midrapidity inclusive jet longitudinal double-spin asymmetry, ALL, in polarized pp collisions at center-of-mass energy s√=200  GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep-inelastic scattering (DIS), semi-inclusive DIS, and RHIC pp data. The measured asymmetries provide evidence at the 3σ level for positive gluon polarization in the Bjorken-x region x>0.05.

Recommended Citation

Gibson-Even, Adam; Stanislaus, Shirvel; Koetke, Donald; and STAR Collaboration, "Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at s√=200  GeV" (2015). Physics and Astronomy Faculty Publications. 138.
https://scholar.valpo.edu/phys_astro_fac_pub/138