منابع مشابه
On Puzzles and Non-Puzzles in B → ππ, πK Decays
Recently, we have seen interesting progress in the exploration of CP violation in B0 d → π+π−: the measurements of mixing-induced CP violation by the BaBar and Belle collaborations are now in good agreement with each other, whereas the picture of direct CP violation is still unclear. Using the branching ratio and direct CP asymmetry of B0 d → π−K+, this situation can be clarified. We predict Ad...
متن کاملNonfactorizable effects in B to charmonium decays
Nonleptonic B to charmonium decays generally deviate from the factorization predictions. We study rescattering effects mediated by intermediate charmed mesons in this class of decay modes and, in particular, we consider B− → K−hc with hc the J PC = 1 c̄c meson, relating this mode to B− → K−χc0. We find B(B− → K−hc) large enough to be measured at the B factories, hence this process could be used ...
متن کاملPrompt Charmonium Production in Z Decays
The color-evaporation model quantitatively describes all data on photoproduction and hadroproduction of charmonium. Although the model is in part nonperturbative, the associated parameters can for instance be determined from the charmonium photoproduction data. At this point its predictions for the prompt production of ψ’s at the Z pole are made with no free parameters. We show here that this a...
متن کاملD-wave charmonium production in B decays
The calculation of D-wave charmonium prodution rates in B meson deacys under the NRQCD factorization formalism is presented. We find that inclusion of the color-octet contributions permits us to detect the D-wave charmonium states in B decays at present experimental facilities. The same amount signals of 2 D-wave state as that of ψ could be observed at LEP and CESR. We also predict the relative...
متن کاملPuzzles in Cabibbo-Suppressed Charm Decays
We identify two Cabibbo suppressed D decay modes with anomalously high branching ratios which are not simply explained by any model. All standard model diagrams that can contribute to these decays are related by symmetries to diagrams for other decays that do not show any such enhancement. If these high branching ratios are confirmed by more precise experiments, they may require new physics to ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2010
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2010.10.088