Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at s√=200 GeV (CROSBI ID 225197)
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Podaci o odgovornosti
Adamczyk, L. ; ... ; Planinić, Mirko ; Poljak, Nikola et al.
engleski
Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at s√=200 GeV
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.
STAR ; asymmetry
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Podaci o izdanju
115 (9)
2015.
092002-1-092002-7
objavljeno
0031-9007
10.1103/PhysRevLett.115.092002