Zero-Recoil Sum Rules for $Λ_b \to Λ_c$ Form Factors

We set up a zero recoil sum rule to constrain the form factors of the $Λ_b \to Λ_c$ transition. Our results are compared with the recent lattice calculation for these transitions. We find the same situation as in the case for $B \to D^*$: The lattice results practically saturate the sum rules, leaving basically no room for excited states.

No reviews yet.

No comments yet.