Decay Constants $f_{D_s^*}$ and $f_{D_s}$ from ${\bar{B}}^0\to D^+ l^- {\barν}$ and ${\bar{B}}^0\to D^+ D_s^{-(*)}$ Decays

Decay Constants $f_{D_s^}$ and $f_{D_s}$ from ${\bar{B}}^0\to D^+ l^- {\barν}$ and ${\bar{B}}^0\to D^+ D_s^{-()}$ Decays

dc.creator	Keum, Y. -Y.
dc.date	1998-10-15
dc.date	1998-10-22
dc.date.accessioned	2026-07-07T04:05:26Z
dc.date.available	2026-07-07T04:05:26Z
dc.description	We calculate the decay constant of $D_s$ and $D_s^{}$ with $\bar{B}^0 \ra D^{+}\ell^{-}ν$ and $\bar{B}^0 \ra D^{+}D_s^{-()}$ decays. In our analysis we assume that factorization ansatz works and used two different form factor behaviours (constant and monopole-type) for $F_0(q^2)$. We also consider the QCD-penguin contributions in hadronic decays within the NDR renormalization scheme at NLO calculation. We estimate the decay constant of the $D_s$ meson to be $219\pm46 MeV$ for (pole/pole)-type form factor and $239\pm50$ $MeV$ for (pole/constant)-type form factor. For $D_s^{}$ meson, we predict $f_{D_s^{}} = 336 \pm 79 MeV$, and $f_{D_s^{*}}/f_{D_s} = 1.41 \pm 0.41$ for (pole/constant)-type form factor.
dc.description	17 pages, no figure
dc.identifier	https://arxiv.org/abs/hep-ph/9810369
dc.identifier	http://arxiv.org/abs/hep-ph/9810369
dc.identifier.uri	http://salesiana.dossiersoluciones.com/handle/123456789/48409
dc.subject	High Energy Physics - Phenomenology
dc.title	Decay Constants $f_{D_s^}$ and $f_{D_s}$ from ${\bar{B}}^0\to D^+ l^- {\barν}$ and ${\bar{B}}^0\to D^+ D_s^{-()}$ Decays
dc.type	text