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Soft gluon emission off a heavy quark revisited | | Raktim Abir
; Carsten Greiner
; Mauricio Martinez
; Munshi G. Mustafa
; Jan Uphoff
; | | Date: |
26 Sep 2011 | | Abstract: | A new generalized suppression factor for gluon emission off a heavy quark is
derived within perturbative QCD, which is valid for the full range of rapidity
of the radiated gluon and also has no restriction on the scaled mass of the
quark with its energy. In the appropriate limit it correctly reproduces the
usual dead cone factor given by Dokshitzer and Kharzeev in the forward rapidity
region. On the other hand, this new suppression factor becomes close to unity
in the backward direction. This indicates a smaller suppression compared to
previous calculations, which should have an impact on the phenomenology of
heavy quark energy loss in the hot and dense matter produced in ultra
relativistic heavy ion collisions. | | Source: | arXiv, 1109.5539 | | Services: | Forum | Review | PDF | Favorites | |
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