Light hadron production in Bc→J/ψ+X decays

Decays of ground state Bc meson Bc→J/ψ+nπ are considered. Using existing parametrizations for Bc→J/ψ form factors and W*→nπ spectral functions we calculate branching fractions and transferred momentum distributions of Bc→J/ψ+nπ decays for n=1, 2, 3, 4. Inclusive decays Bc→J/ψ+ud and polarization asymmetries of final charmonium are also investigated. The results presented in our paper can be used to study form factors of Bc→J/ψ transitions, π-meson system spectral functions, and give the opportunity to check the factorization theorem.