$B_c\to {\eta }_c$ form factors at large recoil: Interplay of soft-quark and soft-gluon dynamics

Guido Bell, Philipp Böer, Thorsten Feldmann +2

We perform an all-order analysis of double-logarithmic corrections to the so-called soft-overlap contribution to heavy-to-light transition form factors at large hadronic recoil. Sp…