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arxiv: 1301.7336 · v3 · pith:WCHGQXATnew · submitted 2013-01-30 · ✦ hep-ph · hep-ex· hep-lat

On the significance of B-decays to radially excited D

Damir Becirevic , Benoit Blossier , Antoine Gerardin , Alain Le Yaouanc , Francesco Sanfilippo This is my paper
classification ✦ hep-ph hep-exhep-lat
keywords decayd-mesonexcitedradiallyb-decaysb0--claimscomputed
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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.

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  1. Improved measurement of the branching fraction of $D_s^+\to\mu^+\nu_\mu$

    hep-ex 2023-07 unverdicted novelty 4.0

    Measures Br(D_s^+ → μ^+ ν_μ) = (0.5294 ± 0.0108_stat ± 0.0085_syst)% and extracts f_{D_s^+} |V_cs| = 241.8 ± 4.7 MeV.