A lattice study of ${\Lambda }_b$ semileptonic decay

Abstract

We present results from a lattice study of the semileptonic decay ${\Lambda }_b\to {\Lambda }_{c}l{\nu }_l$. We use $O(a^2,{\alpha }_s{a}^2)$ improved quenched lattices of the MILC collaboration, with lattice spacing $\sim 0.13$ fm. For the valence quarks, the tadpole-improved clover action is used, with the Fermilab method employed for the heavy quarks. Form factors are extracted from the vector as well as the axial-vector part of the current.

3 pages, 7 figures, Lattice2002(heavyquark)