Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay

Details Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay

2002-09-18

arxiv.org/abs/hep-ph/0209204v2

JHEP 0212 (2002) 015

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 6 figures, JHEP style. Few changes after referee report, one reference added, numerical results unchanged

Scientific paper

10.1088/1126-6708/2002/12/015

We study soft-gluon radiation in top quark decay within the framework of perturbative fragmentation functions. We present results for the b-quark energy distribution, accounting for soft-gluon resummation in both the MSbar coefficient function and in the initial condition of the perturbative fragmentation function. The results show remarkable improvement and the b-quark energy spectrum in top quark decay exhibits very little dependence on factorization and renormalization scales. We present some hadron-level results in both x_B and moment space by including non-perturbative information determined from e+e- data.

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