Double-spin asymmetry of electrons from heavy-flavor decays<? format?> in p<? format?>+<? format?> p collisions at s<? format?>=<? format?> 200 GeV
A Adare, S Afanasiev, C Aidala, NN Ajitanand… - Physical Review D …, 2013 - APS
A Adare, S Afanasiev, C Aidala, NN Ajitanand, Y Akiba, R Akimoto, H Al-Ta'ani, J Alexander…
Physical Review D—Particles, Fields, Gravitation, and Cosmology, 2013•APSWe report on the first measurement of the double-spin asymmetry, ALL, of electrons from the
decays of hadrons containing heavy flavor in longitudinally polarized p+ p collisions at s=
200 GeV for<? format?> p T= 0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity
(| η|< 0.35) with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured
asymmetries are consistent with zero within the statistical errors. We obtained a constraint
for the polarized gluon distribution in the proton of| Δ g/g (log 10 x=-1.6-0.4+ 0.5, μ= m T c) …
decays of hadrons containing heavy flavor in longitudinally polarized p+ p collisions at s=
200 GeV for<? format?> p T= 0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity
(| η|< 0.35) with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured
asymmetries are consistent with zero within the statistical errors. We obtained a constraint
for the polarized gluon distribution in the proton of| Δ g/g (log 10 x=-1.6-0.4+ 0.5, μ= m T c) …
We report on the first measurement of the double-spin asymmetry, , of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized collisions at for <?format ?> to . The asymmetry was measured at midrapidity () with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured asymmetries are consistent with zero within the statistical errors. We obtained a constraint for the polarized gluon distribution in the proton of |Δg/g(log10x=-1.6-0.4+0.5,μ=mTc)|2<0.030 () based on a leading-order perturbative quantum chromodynamics model, using the measured asymmetry.