Exclusive Semileptonic $B$ Decays: Dispersive Bounds and Lattice Results

Abstract

The current status of lattice and dispersive bound calculations for exclusive semileptonic B decays is reviewed. Emphasis is placed on decays relevant for the measurement of the sides of the unitarity triangle determined by |V ub | and |V cb |.

Conference summary

“…Only the lattice model predictions of UKQCD are used here. More lattice gauge predictions for the rates in these reactions, at least in some regions of q 2 , are promised soon [38] [26] with better errors. My view is that with experimental checks from measuring form-factors and unquenched lattice gauge models the errors will eventually decrease.…”

Future of Heavy Flavour Physics: Experimental Perspective

“…Only the lattice model predictions of UKQCD are used here. More lattice gauge predictions for the rates in these reactions, at least in some regions of q 2 , are promised soon [44] [27] with better errors. My view is that with experimental checks from measuring form-factors and unquenched lattice gauge models the errors will eventually decrease.…”

Lattice Results for Decay Constants and Mixing

“…Other applications of lattice QCD covered by separate talks are semileptonic decay form factors [4], quark masses [5], and quarkonia and hybrid spectrum [6]. The most recent review of lattice studies of B physics is found in [7].…”