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Title: Measurement of the cross section and longitudinal double-spin asymmetry for dijet production in polarized p p collisions at s = 200 GeV

Journal Article · · Physical Review. D.
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We report the first measurement of the longitudinal double-spin asymmetry ALL for midrapidity dijet production in polarized pp collisions at a center-of-mass energy of s=200 GeV. The dijet cross section was measured and is shown to be consistent with next-to-leading order (NLO) perturbative QCD predictions. ALL results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent NLO global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-x > 0.05.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
STAR Collaboration
Grant/Contract Number:
SC0012704; AC02-05CH11231
OSTI ID:
1376086
Alternate ID(s):
OSTI ID: 1353508; OSTI ID: 1379793; OSTI ID: 1430679
Report Number(s):
BNL-113848-2017-JA; PRVDAQ; R&D Project: PO 004; KB0202012
Journal Information:
Physical Review. D., Vol. 95, Issue 7; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Analytical approaches to the determination of spin-dependent parton distribution functions at NNLO approximation text January 2018
Monte Carlo sampling variant of the DSSV14 set of helicity parton densities text January 2019
Monte Carlo sampling variant of the DSSV14 set of helicity parton densities journal December 2019
Longitudinal double-spin asymmetry for inclusive jet and dijet production in p p collisions at s = 510 GeV journal September 2019
Analytical approaches to the determination of spin-dependent parton distribution functions at NNLO approximation journal May 2018


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