We compute the branching ratio of inclusive B → ηXs decay based upon the QCD anomaly mechanism: b → s + g → s + g + η. To obtain a reliable B → ηXs branching ratio, we calculate the b → s+ g form factors up to the next-to-leadinglogarithmic(NLL) approximation. We point out that the Standard Model prediction for B → ηXs is consistent with the CLEO data, in contrast to the claims of some previous...

We have measured the beta-decay branching ratio for the transition from 21Na to the first excited state of 21Ne. A recently published test of the standard model, which was based on a measurement of the β-ν correlation in the decay of 21Na, depended on this branching ratio. However, until now only relatively imprecise (and, in some cases, contradictory) values existed for it. Our new result, 4.7...

Theoretical study of anomalous decay mode τ → ωπππν is presented. Theoretical value of the branching ratio of τ − → ωπ − π 0 π 0 ν agrees well with data. The branching ratio of τ − → ωπ + π − π − ν τ is predicted. It is found that the vertices of a 1 ρπ and ωρπ play dominant role in these two decay modes. CVC is satisfied and there is no adjustable parameter.

It is shown that intrinsic neutrino flavor violation invariably occurs when neutrinos are created within the standard model augmented by the known massive neutrinos, with mixing and nondegenerate masses. The effects are very small but much greater than the naive estimate m=E or the branching ratio of indirect flavor violating processes such as ! e within the SM. We specifically calculate the pr...

It is shown that the experimental data of ψ and ψ are consistent with a −90◦ phase between the strong and eletromagnetic decay amplitudes. The ee → ρπ measured at ψ is also consistent with the branching ratio predicted by Rosner’s scenario on ρπ puzzle in charmonium physics. This scenario leads to a possible large charmless branching ratio in ψ decays. work in collaboration with C. Z. Yuan and ...

The inclusive semileptonic branching ratio is often employed to normalize other inclusive B decays. Using recent determinations of the non-perturbative parameters of the Operator Product Expansion we compute the normalization factor for the branching ratio of B → Xsγ and find a few percent enhancement with respect to previous determinations. ar X iv :0 80 5. 02 71 v3 [ he pph ] 2 6 Se p 20 08

The effects of the anomalous contact terms L η(η ′)ρππ are taken into account in calculating the decay rates of τ → η(η ′)ππν. The branching ratio of τ → ηπππν is calculated. Theoretical result agrees with the data. It is the first time that the anomalous Wess-Zumino-Witten vertex ηaa is tested. A a 1 resonance is predicted in the final state of the three pions. The prediction of the branching ...

The rare decay B0 → φφ can occur only via penguin annihilation topology in the standard model. We calculate this channel in the perturbative QCD approach. The predicted branching ratio is very small at (10−8). We also give the polarization fractions, which shows that the transverse polarization contribution is comparable to the longitudinal one, due to a big transverse contribution from factori...

We investigate the cosmological moduli problem by studying a modulus decay in detail and find that the branching ratio of the gravitino production is generically of O(0.01-1), which causes another cosmological disaster. Consequently, the cosmological moduli problem cannot be solved simply by making the modulus mass heavier than 100 TeV. We also illustrate our results by explicitly calculating t...

The rare decay B0 → φφ can occur only via penguin annihilation topology in the standard model. We calculate this channel in the perturbative QCD approach. The predicted branching ratio is very small at (10−8). We also give the polarization fractions, which shows that the transverse polarization contribution is comparable to the longitudinal one, due to a big transverse contribution from factori...