Heavy Quark Expansion in 1/\hat{m}_Q and |V_{cb}| Extraction

Details Heavy Quark Expansion in 1/\hat{m}_Q and |V_{cb}| Extraction Heavy Quark Expansion in 1/\hat{m}_Q and |V_{cb}| Extraction

2010-04-30

arxiv.org/abs/1004.5444v1

J.Phys.G38:045004,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 11 figures

Scientific paper

10.1088/0954-3899/38/4/045004

The dressed heavy quark mass \hat{m}_Q=m_Q+\bar{{\Lambda}} with \bar{{\Lambda}} being the binding energy is introduced to characterize the heavy hadrons containing a single heavy quark. A heavy quark expansion in terms of the inverse of the dressed heavy quark mass 1/\hat{m}_Q is presented with a complete decomposition of the full field and integrating out the small components. The heavy quark-antiquark coupling effects are included in the finite mass corrections. It is shown that the 1/\hat{m}_Q expansion is more favorable in application. The extraction of |V_{cb}| from exclusive B decays is studied by using such a new expansion approach.

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