Cross section and transverse single-spin asymmetry of muons from open heavy-flavor decays in polarized p plus p collisions at root s=200 GeV

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2017-06-01
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Aidala, C.
Apadula, Nicole
Campbell, Sarah
Ding, Lei
Hill, John
Hotvedt, Nels
Lajoie, John
Lebedev, Alexandre
Ogilvie, Craig
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Ogilvie, Craig
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Physics and Astronomy
Abstract

The cross section and transverse single-spin asymmetries of mu(-) and mu(+) from open heavy-flavor decays in polarized p + p collisions at root s = 200 GeV were measured by the PHENIX experiment during 2012 at the Relativistic Heavy Ion Collider. Because heavy-flavor production is dominated by gluon-gluon interactions at root s = 200 GeV, these measurements offer a unique opportunity to obtain information on the trigluon correlation functions. The measurements are performed at forward and backward rapidity (1.4 < vertical bar y vertical bar < 2.0) over the transverse momentum range of 1.25 < p(T) < 7 GeV/c for the cross section and 1.25 < p(T) < 5 GeV/c for the asymmetry measurements. The obtained cross section is compared to a fixed-order-plus-next-to-leading-log perturbative-quantum-chromodynamics calculation. The asymmetry results are consistent with zero within uncertainties, and a model calculation based on twist-3 three-gluon correlations agrees with the data.

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This article is published as Aidala, C., N. N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred, K. Aoki et al. "Cross section and transverse single-spin asymmetry of muons from open heavy-flavor decays in polarized p+ p collisions at s= 200 GeV." Physical Review D 95, no. 11 (2017): 112001. DOI:10.1103/PhysRevD.95.112001. Posted with permission.

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Sun Jan 01 00:00:00 UTC 2017
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