First Lattice Study of Semileptonic Decays of Lambda_b and Xi_b Baryons

Abstract

We present the results of the first lattice study of semileptonic decays of baryons containing a b-quark. Predictions for the decay distributions are given and the Isgur-Wise functions for heavy baryons are computed, for values of the velocity transfer up to about omega=1.2. The computations are performed on a 24^3 x 48 lattice at beta=6.2 using the Sheikholeslami-Wohlert action in the quenched approximation.

55 pages, 17 ps figures, Latex 2.09, uses epsf

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• Note on the Slope Parameter of the Baryonic Λ_b to Λ_c Isgur-Wise Function
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• Analysis of the Lambda_b -> Lambda_c + l nu_l decay within a light-front constituent quark model
• Opposite-Parity Contaminations in Lattice Nucleon Form Factors
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• Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${\Xi }_b$ and ${\Omega }_b$ supported by hadron spectroscopy
• Heavy baryon wave functions, Bakamjian-Thomas approach to form factors, and observables in ${\Lambda }_b\to {\Lambda }_c\left({\frac{1}{2}}^{\pm }\right)\ell \overline{\nu }$ transitions
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• Heavy Quark Spin Symmetry and Heavy Baryons: Electroweak Decays