Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

6-25-2014

Journal or Book Title

Physical Review Letters

Volume

112

Issue

25

First Page

252301

Last Page

252301

DOI

10.1103/PhysRevLett.112.252301

Abstract

The PHENIX experiment has measured open heavy-flavor production via semileptonic decay over the transverse momentum range 1 < p(T) < 6 GeV/c at forward and backward rapidity (1.4 < vertical bar y vertical bar < 2.0) in d + Au and p + p collisions at root s(NN) = 200 GeV. In central d + Au collisions, relative to the yield in p + p collisions scaled by the number of binary nucleon-nucleon collisions, a suppression is observed at forward rapidity (in the d-going direction) and an enhancement at backward rapidity (in the Au-going direction). Predictions using nuclear-modified-parton-distribution functions, even with additional nuclear-p(T) broadening, cannot simultaneously reproduce the data at both rapidity ranges, which implies that these models are incomplete and suggests the possible importance of final-state interactions in the asymmetric d + Au collision system. These results can be used to probe cold-nuclear-matter effects, which may significantly affect heavy-quark production, in addition to helping constrain the magnitude of charmonia-breakup effects in nuclear matter.

Comments

This is an article from Physical Review Letters 112 (2014): 252301-1, doi:10.1103/PhysRevLett.112.252301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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