Thursday, January 31, 2013

1301.7336 (Damir Becirevic et al.)

On the significance of B-decays to radially excited D    [PDF]

Damir Becirevic, Benoit Blossier, Antoine Gerardin, Alain Le Yaouanc, Francesco Sanfilippo
We point out that the recent claims of a relatively large value of the B --> D' transition form factor could be tested in experiments 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.
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