SU(3)F in nonleptonic charm decays∗
نویسندگان
چکیده
We present updated results of an SU(3)-flavor analysis of D→ PP decay data including linear breaking and no further assumptions. The global fit is consistent with nominal (∼ 30%) SU(3)F breaking and returns enhanced penguin (triplet) contributions. Their size is driven, in addition to ∆ACP, by the CP asymmetries of D0→ KSKS, Ds→ KSπ and Ds→ K+π0 decays. It is therefore especially important to improve these measurements.
منابع مشابه
Nonfactorizable soft gluons in nonleptonic heavy meson decays
We include nonfactorizable soft gluon corrections into the perturbative QCD formalism for exclusive nonleptonic heavy meson decays, which combines factorization theorems and effective field theory. These corrections are classified according to their color structures, and exponentiated separately to complete the Sudakov resummation up to next-to-leading logarithms. The nonfactorizable contributi...
متن کاملExclusive Nonleptonic Bottom to Charm Baryon Decays including Nonfactorizable Contributions
Exclusive nonleptonic decays of bottom baryons to charm baryons and pseudoscalar light mesons are analyzed within a relativistic three-quark model. We include factorizing as well as nonfactorizing contributions to the decay amplitudes. The total contribution of the nonfactorizing diagrams amount up to 30 % of the factorizing contributions in amplitude. We present detailed predictions for rates ...
متن کاملCharm Nonleptonic Decays and Final State Interactions
A global previous analysis of two-body nonleptonic decays of D mesons has been extended to the decays involving light scalar mesons. The allowance for final state interaction also in nonresonant channels provides a fit of much improved quality and with less symmetry breaking in the axial charges. We give predictions for about 50 decay branching ratios yet to be measured. We also discuss long di...
متن کاملExclusive Nonleptonic Decays of Bottom and Charm Baryons in a Relativistic Three-Quark Model: Evaluation of Nonfactorizing Diagrams
Exclusive nonleptonic decays of bottom and charm baryons are studied within a relativistic three-quark model with a Gaussian shape for the momentum dependence of the baryon-three-quark vertex. We include factorizing as well as nonfactorizing contributions to the decay amplitudes. For heavy-to-light transitions Q → qud the total contribution of the nonfactorizing diagrams amount up to ∼ 60 % of ...
متن کاملJHU–TIPAC–940016 Possible Puzzles in Nonleptonic B Decays
I discuss the recent controversy over the semileptonic branching ratio of the B meson, pointing out that it is only the combination of this quantity with the reported charm multiplicity in B decays which is in serious conflict with theoretical calculations. I consider possible solutions to the problem.
متن کامل