A guide to the QCD light-cone sum rule for $b$-quark decays

Abstract

We overview the current status and future perspectives of the QCD-based method of light-cone sum rules. The two main versions of these sum rules, using light-meson and $B$-meson distribution amplitudes are introduced and the most important applications of the method are discussed. We also outline open problems and future perspectives of this method.

Comments: Invited review for EPJST, 48 pages, 8 tables