Heavy Quark Symmetry in Nonleptonic B-Decays to Excited Charmed Mesons

Details Heavy Quark Symmetry in Nonleptonic B-Decays to Excited Charmed Mesons Heavy Quark Symmetry in Nonleptonic B-Decays to Excited Charmed Mesons

2004-05-29

arxiv.org/abs/hep-ph/0405290v2

Phys.Rev. D70 (2004) 114006

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 5 figures, typos corrected, references added, discussion on subleading effects clarified, replaced version accepted

Scientific paper

10.1103/PhysRevD.70.114006

We show in a model independent way the equality of the branching fractions and strong phases for B-> D_1M and B-> D_2^*M at leading order in Lambda _{QCD}/Q and alpha_s(Q) where Q={m_b,m_c,E_M} and M is a light meson. These results apply in the color allowed and color suppressed channels and follow from a factorization theorem in SCET combined with heavy quark symmetry. The expected heavy quark symmetry suppression of leading order contributions in the color allowed sector based on analysis of semileptonic decays, is shown to disappear at maximum recoil. Subleading corrections are suppressed by at least one power of Lambda_{QCD}/Q and this is explicitly verified for subleading semileptonic form factors at maximum recoil.

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