Comment on Resummation of Mass Distribution for Jets Initiated by Massive Quarks
arXiv:0804.3922 · doi:10.1016/j.physletb.2008.11.006
Abstract
We compute in the heavy quark effective theory the soft coefficient D_2 entering the resummation of next-to-next-to-leading threshold logarithms for jets initiated by a quark with a small mass compared to the hard scale of the process. We find complete agreement with a previous computation in full QCD. Contrary to our previous guess, this coefficient turns out to be different from that one entering heavy flavor decay or heavy flavor fragmentation.
arXiv comment5 pages, no figures; minor changes, references added, version accepted in Phys.Lett. B
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