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Dong-Sheng Du

Publications and source records attributed to Dong-Sheng Du.

24 records · Page 2Linked to original sources
arXiv1998

Futher Study of CP Violation and Branching Ratios for $\bar{B^0}\to J/ψK_s$ and $\bar{B^0}\to ϕK_s$ in the Standard Model and Beyond

In this work we study the CP violation for $\bar{B^0}\to J/ψK_s$ and $\bar{B^0}\to ϕK_s$ up to leading and next-to-leading order QCD corrections in the standard model, two-Higgs-doublet model and the minimal supersymmetric extension of the standard model. We also study the effect of new physics on the branching ratios of these two decay modes. We find that within the parameter space constrained by the observation of the decay $b\to sγ$, new physics does not affect the CP asymmetries greatly, and the prediction of new physics to the branching ratios of $\bar{B^0}\to J/ψK_s$ and $\bar{B^0}\to ϕK_s$ is the same as that of the standard model up to a minor discrepancy as far as the Yukama couplying constants are perturbative.

hep-ph↗
arXiv1998

Inelastic Final-State Interactions of $B \to VV \to πK$ Processes

We study the final-state interactions in $B \to πK$ decays through $B \to VV \to πK$ processes where the inelastic rescattering occurs via single pion exchange. The next-to-leading order low energy effective Hamiltonian and BSW model are used to evaluate the weak transition matrix elements and the final-state interactions. We found that the final-state interaction effects in $B \to ρK^* \to πK$ processes are significant. The Fleischer-Mannel relation about the CKM angle $γ$ may be significantly modified.

hep-ph↗
arXiv1998

Momentum Spectrum of $η'$ Meson in the Inclusive Decay $B\to η'X_s$

The momentum distribution for the $η'$ meson produced through the inclusive decay $B\to η'X$ is investigated under two decay mechanisms, $b\toη's$ and $b\to η' s g$. Although all these two mechanisms can explain the recently observed decay rate of $B\to η'X$, the momentum spectrums for $η'$ meson predicted by them are strongly different. Thus detailed experiment is proposed to distinguish the two cases.

hep-ph↗
arXiv1998

Space-like Penguin Effects in $B_{c}$ Decays

The space-like penguin contributions to branching ratios and CP asymmetries in charmless decays of $B_{c}$ to two pseudoscalar mesons are studied using the next-to-leading order low energy effective Hamiltonian and factorization approximation. Both the gluonic penguin and the electroweak penguin diagrams are considered. In addition the annihilation diagram contributions are also taken in account. We find that the space-like penguin effects are significant.

hep-ph↗
arXiv1995

Space-like Penguin Effects in $B \to PP$ Decays

The space-like penguin contributions to branching ratios and CP asymmetries in charmless decays of $B$ to two pseudoscalar mesons are studied using the next-to-leading order low energy effective Hamiltonian. Both the gluonic penguin and the electroweak penguin diagrams are considered. We find that the effects are significant.

hep-ph↗