Y. Keum

activity

19982008

most citedCP asymmetry, branching ratios and isospin breaking effects of B -> K* gamma with the perturbative QCD approach

46 citations · 92 across the 7 of their papers we have counts for

collaborators

Showing 1998Show all

3 papers · 1 filter

hep-ph1998

Factorization in Color-Suppressed B Meson Decays

Y. -Y. Keum

We summerize the status of factorization hypothesis in the color-suppressed B meson decays : $B \to J / ψ K^{(*)}$ . We present the general formalism for decay rates and polarization f…

hep-ph1998

Decay Constants $f_{D_{s}^{}}$ and $f_{D_{s}}$ from $B ˉ^{0} \to D^{+} l^{-} ν ˉ$ and $B ˉ^{0} \to D^{+} D_{s}^{- ()}$ Decays

Y. -Y. Keum

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…

hep-ph1998

Penguin Contributions in the Lifetime Difference between $B_{s}$ and $B_{d}$ , and a Possible New Physics

Y. -Y. Keum

We consider penguin contributions to the lifetime splitting between the $B_{s}$ and the $B_{d}$ meson. In the Standard Model the penguin effects are found to be opposite in sign, but o…

Factorization in Color-Suppressed B Meson Decays

Decay Constants fDs∗​​ and fDs​​ from Bˉ0→D+l−νˉ and Bˉ0→D+Ds−(∗)​ Decays

Penguin Contributions in the Lifetime Difference between Bs​ and Bd​, and a Possible New Physics

Decay Constants $f_{D_{s}^{}}$ and $f_{D_{s}}$ from $B ˉ^{0} \to D^{+} l^{-} ν ˉ$ and $B ˉ^{0} \to D^{+} D_{s}^{- ()}$ Decays

Penguin Contributions in the Lifetime Difference between $B_{s}$ and $B_{d}$ , and a Possible New Physics