Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

12-12-2012

Journal or Book Title

Physical Review Letters

Volume

109

Issue

24

First Page

242301

DOI

10.1103/PhysRevLett.109.242301

Abstract

The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d + Au and p + p collisions at root S-NN = 200 GeV in the transverse-momentum range 0.85 <= p(T)(e) <= 8.5 GeV/c. In central d + Au collisions, the nuclear modification factor R-dA at 1.5 < p(T) < 5 GeV/c displays evidence of enhancement of these electrons, relative to those produced in p + p collisions, and shows that the mass-dependent Cronin enhancement observed at the Relativistic Heavy Ion Collider extends to the heavy D meson family. A comparison with the neutral-pion data suggests that the difference in cold-nuclear-matter effects on light- and heavy-flavor mesons could contribute to the observed differences between the pi(0) and heavy-flavor-electron nuclear modification factors R-AA.

Comments

This is an article from Physical Review Letters 109 (2012): 242301-1, doi:10.1103/PhysRevLett.109.242301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Included in

Nuclear Commons

Share

COinS