Bottom-quark fragmentation in top-quark decay

We study the fragmentation of the b quark in top decay in NLO QCD, within the framework of perturbative fragmentation, which allows one to resum large logarithms ∼ log( m t 2/ m b 2). We show the b-energy distribution, which we compare with the exact O(α S) result for a massive b quark. We use data...

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Bibliographic Details
Published in:Nuclear physics. B 2002-02, Vol.623 (1), p.247-270
Main Authors: Corcella, G., Mitov, A.D.
Format: Article
Language:English
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Summary:We study the fragmentation of the b quark in top decay in NLO QCD, within the framework of perturbative fragmentation, which allows one to resum large logarithms ∼ log( m t 2/ m b 2). We show the b-energy distribution, which we compare with the exact O(α S) result for a massive b quark. We use data from e + e − machines in order to describe the b-quark hadronization and make predictions for the energy spectrum of b-flavoured hadrons in top decay. We also investigate the effect of NLL soft-gluon resummation in the initial condition of the perturbative fragmentation function on parton- and hadron-level energy distributions.
ISSN:0550-3213
1873-1562
DOI:10.1016/S0550-3213(01)00639-3