Phys. Rev. Lett. 93, 072301 (2004) [4 pages]Heavy Quark Energy Loss in a Nuclear MediumReceived 28 October 2003; revised 20 May 2004; published 11 August 2004 Multiple scattering, modified fragmentation functions, and radiative energy loss of a heavy-quark propagating in a nuclear medium are investigated in perturbative QCD. Because of the quark mass dependence of the gluon formation time, the medium size dependence of heavy-quark energy loss is found to change from a linear to a quadratic form when the initial energy and momentum scale are increased relative to the quark mass. The radiative energy loss is also significantly suppressed relative to a light quark due to the suppression of collinear gluon emission by a heavy quark. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.072301
DOI:
10.1103/PhysRevLett.93.072301
PACS:
24.85.+p, 12.38.Bx, 13.60.–r, 13.87.Ce
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