Analysis of two-body decays of charmed baryons using the quark-diagram scheme.
نویسندگان
چکیده
We give a general formulation of the quark diagram scheme for the nonleptonic weak decays of baryons. We apply it to all decays of the antitriplet and sextet charmed baryons and express their decay amplitudes in terms of the quark-diagram amplitudes, including the e ects of nal-state interactions. (We also point out the mistaken results in the literature.) We obtain many relations among various decay modes. It will be interesting to test them in future experiments.
منابع مشابه
Nonleptonic Weak Decays of Bottom Baryons
Cabibbo-allowed two-body hadronic weak decays of bottom baryons are analyzed. Contrary to the charmed baryon sector, many channels of bottom baryon decays proceed only through the external or internal W -emission diagrams. Moreover, W -exchange is likely to be suppressed in the bottom baryon sector. Consequently, the factorization approach suffices to describe most of the Cabibbo-allowed bottom...
متن کاملQuark and pole models of nonleptonic decays of charmed baryons.
Quark and pole models of nonleptonic decays of charmed baryons are analysed from the point of view of their symmetry properties. The symmetry structure of the parity conserving amplitudes that corresponds to the contribution of the ground-state intermediate baryons is shown to differ from the one hitherto employed in the symmetry approach. It is pointed out that the ”subtraction” of sea quark e...
متن کاملSpectator effects in semileptonic decay of charmed baryons
It is shown that the absolute rate of the semileptonic decays of the Ξc baryons can be as much as two times higher than the semileptonic decay rate of Λc due to the Pauli interference of the strange quark. This interference effect is still larger in the semileptonic decay rate of Ωc. An experimental measurement of the difference of these rates would thus provide an important piece of informatio...
متن کاملTwo-body Cabibbo-suppressed decays of charmed baryons into vector mesons and into photons.
The heavy quark effective theory and the factorization approximation are used to treat the Cabibbo-suppressed decays of charmed baryons to vector mesons, ΛC → pρ, pω, Ξ C → Σφ,Σρ,Σω and Ξ0C → Λφ,Λρ,Λω. The input from two recent experimental results on ΛC decays allows the estimation of the branching ratios for these modes, which turn out to be between 10 and 10. The long distance contribution o...
متن کاملSpectroscopy and Strong Decays of Charmed Baryons
In the past years many new excited charmed baryon states have been discovered by BaBar, Belle and CLEO. In particular, B factories have provided a very rich source of charmed baryons both from B decays and from the continuum ee → cc̄. A new era for the charmed baryon spectroscopy is opened by the rich mass spectrum and the relatively narrow widths of the excited states. Experimentally and theore...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review. D, Particles and fields
دوره 54 3 شماره
صفحات -
تاریخ انتشار 1996