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. (C) 2008 Elsevier B.V. All rights reserved.
Comment on resummation of mass distribution for jets initiated by massive quarks
Di Giustino L;
2009-01-01
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. (C) 2008 Elsevier B.V. All rights reserved.
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