On the significance of B-decays to radially excited D
arXiv:1301.7336 · doi:10.1016/j.nuclphysb.2013.04.008
Abstract
We discuss the possibilities of testing the recent claims of a relatively large value of the B --> D' transition form factor through B0--> D' pi+ and B- --> D' pi- decay modes. To estimate the width of the latter we need the decay constant of the radially excited D-meson that we computed in lattice QCD with Nf=2 dynamical flavors and after taking the continuum limit we found f(D')=117(25) MeV. We also provide an update for the values of the D-meson decay constants obtained by using maximally twisted mass QCD.
16 pages including 5 tables and 3 figures [published version]