Lifetime Difference and Endpoint effect in the Inclusive Bottom Hadron Decays

Details Lifetime Difference and Endpoint effect in the Inclusive Bottom Hadron Decays Lifetime Difference and Endpoint effect in the Inclusive Bottom Hadron Decays

2004-03-08

arxiv.org/abs/hep-ph/0403078v1

Int.J.Mod.Phys. A19 (2004) 3685-3706

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, Revtex, 10 figures, 6 tables, published version

Scientific paper

10.1142/S0217751X04018476

The lifetime differences of bottom hadrons are known to be properly explained within the framework of heavy quark effective field theory(HQEFT) of QCD via the inverse expansion of the dressed heavy quark mass. In general, the spectrum around the endpoint region is not well behaved due to the invalidity of $1/m_Q$ expansion near the endpoint. The curve fitting method is adopted to treat the endpoint behavior. It turns out that the endpoint effects are truly small and the explanation on the lifetime differences in the HQEFT of QCD is then well justified. The inclusion of the endpoint effects makes the prediction on the lifetime differences and the extraction on the CKM matrix element $|V_{cb}|$ more reliable.

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