QCD Predictions for Lepton Spectra in Inclusive Heavy Flavour Decays

Details QCD Predictions for Lepton Spectra in Inclusive Heavy Flavour Decays QCD Predictions for Lepton Spectra in Inclusive Heavy Flavour Decays

1993-04-06

arxiv.org/abs/hep-ph/9304225v1

Phys.Rev.Lett.71:496-499,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages (3 figures are not included), Latex, UND-HEP-93-BIG01, TPI-MINN-93/12-T, UMN-TH-1149/93

Scientific paper

10.1103/PhysRevLett.71.496

We derive the lepton spectrum in semileptonic beauty decays from a nonperturbative treatment of QCD; it is based on an expansion in $1/m_Q$ with $m_Q$ being the heavy flavour quark mass. The leading corrections arising on the $1/m_Q$ level are completely expressed in terms of the difference in the mass of the heavy hadron and the quark. Nontrivial effects appear in $1/m_Q^2$ terms affecting mainly the endpoint region; they are different for meson and baryon decays as well as for beauty and charm decays.

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