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.
5 pages, no figures; minor changes, references added, version accepted in Phys.Lett. B