QCD Factorization and Rare B Meson Decays

Some recent progress in China in the study of charmless B decays with QCD factorization is reviewed. Chirally enhanced power corrections and infrared divergence problem are stressed.Comment: 6 pages, 1 figure, 1 table; one footnote is added; Plenary talk given at the International conference on QCD and hadronic physics, June, 16-20, 2005, Beijing, Chin

Electroweak Penguin Contributions in B−(Bd0‾)→PPB^-(\overline {B_d^0}) \to PP and PVPV decays Beyond Leading Logarithms

Using the next-to-leading order low energy effective Hamiltonian for $|\Delta B|=1$, $\Delta C=\Delta U=0$ transitions, the contributions of electroweak penguin operators in $B^-(\overline {B_d^0})\rightarrow PP$ and $PV$ decays are estimated in the standard model. We find that, for some channels, the electroweak penguin effects can enhance or reduce the QCD penguin and/or tree level contributions by at least $30\%$, and can even play dominant role.Comment: 12 pages, late

Test of T violation in neutral B decays

T violation should be tested independently of CP violation. Besides K system, B meson decays provide another good place to study T violation. In the Standard Model, T violation in $B^0 \rightleftharpoons \bar{B^0}$ oscillation is expected to be small. The angular distribution of $B\to VV$ decay permits one to extract the T-odd correlation. In the absence of final state interaction, T violation in $B\to J/\psi(l^+ l^-) K^*(K_S\pi^0)$ decay can reach $4-7$ via $B^0-\bar{B^0}$ mixing.Comment: Latex, 11 pages, revised version will appear in PL