Linear and higher order power corrections in semileptonic B decays

Abstract

In previous work we have developed a relativistic quark model of mesons which is consistent with all QCD constraints at zeroth and first order in the heavy quark expansion. Here we obtain first order model predictions for the differential decay spectrum, the forward-backward asymmetry $A_{FB}$ and the $D^{\ast }$ polarization parameter $\alpha$ in the decay $B\to D^{\ast }\ell \nu$. We compare these with the predictions of QCD sum rules at first order. The model suggests why the corrections allowed at first order are small, concurrently with substantial corrections at second order.

arXiv comment14 pages, LaTeX, 8 stand-alone LaTeX figures in separate file, UTPT-93-08. This is the version published long ago but not previously archived

References in corpus (5)

• Second Order Power Corrections in the Heavy Quark Effective Theory I. Formalism and Meson Form Factors
• Second Order Power Corrections in the Heavy Quark Effective Theory II. Baryon Form Factors
• The Residual Mass Term in the Heavy Quark Effective Theory
• Simply Modeling Meson HQET
• Hyperfine Effects and Large $1/m_Q^2$ Corrections

Cited by in corpus (7)

• A Constituent Quark-Meson Model for Heavy-Meson Processes
• Comparison of 1/mQ^2 Corrections in Mesons and Baryons
• Semileptonic B -> rho and B -> a_1 transitions in a quark-meson model
• Analysis of the Lambda_b -> Lambda_c + l nu_l decay within a light-front constituent quark model
• Simply Modeling B -> K* gamma
• Quark Structure and Weak Decays of Heavy Mesons
• Mass relations among family members of quarks and leptons