Form Factors and Decay Rates for Heavy $\Lambda$ Semileptonic Decays from QCD Sum Rules

Abstract

QCD sum rules for the determination of form factors of ${\Lambda }_b$ and ${\Lambda }_c$ semileptonic decays are investigated. With a form for the baryonic current appropriate for the limits of the heavy quark symmetries, the different tensor structures occurring in the two- and three-point functions are separately studied, and in each case general relations are written for the form factors. Particular attention is given to the treatment of the kinematical region ascribed to the continuum. The $t$-dependence of the form factors and the decay rates are numerically evaluated and compared to experimental information.

arXiv comment45 pages, 14 figures

References in corpus (14)

• Heavy Quark Symmetry
• Heavy baryons
• Heavy Baryon Transitions in a Relativistic Three-Quark Model
• Use and Misuse of QCD Sum Rules in Heavy-to-light Transitions: the Decay $B\to \rho e\nu$ Reexamined
• 1/M Corrections to Baryonic Form Factors in the Quark Model
• Theoretical Update on the Model-Independent Determination of |V_{cb}| Using Heavy Quark Symmetry
• QCD Sum Rule Analysis for the Λ_b to Λ_c Semileptonic Decay
• The Isgur-Wise Function in Small Velocity Limit
• The Isgur-Wise Function to $O({\alpha }_s)$ from Sum Rules in the Heavy Quark Effective Theory
• Decay ${\Lambda }_b\to pl\bar{\nu }$ in QCD sum rules
• QCD Sum Rules Calculation of Heavy $\Lambda$ Semileptonic Decay
• Analysis of Lambda_b to Lambda_c Weak Decays in Heavy Quark Effective Theory
• Theory of Beauty Lifetimes
• A first study of the semi-leptonic decay of the ${\Lambda }_b$ baryon

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