Speaker
Martin Rodrigo Novoa Brunet
(Istituto Nazionale di Fisica Nucleare)
Description
We analyze the form factors that parametrize the B_c to J/psi, eta_c matrix elements of the operators in the effective b to c semileptonic Hamiltonian. We consider an expansion in nonrelativistic QCD, classifying the heavy quark spin symmetry breaking terms and expressing the form factors in terms of universal functions in a selected kinematical range. Using as an input the lattice QCD results for the $B_c \to J/\psi$ matrix element of the SM operator, we obtain information on these universal functions and other form factors.
Primary author
Martin Rodrigo Novoa Brunet
(Istituto Nazionale di Fisica Nucleare)
