Non - relativistic Model for the Semileptonic Λ b → Λ c Decay
نویسندگان
چکیده
We calculate the decay width for Λb → Λceν̄ in the frame work of a nonrelativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value. Electronic address: [email protected] Electronic address: [email protected] Electronic address: [email protected] Electronic address: [email protected]
منابع مشابه
Bound on the curvature of the Isgur - Wise function of the baryon semileptonic decay Λ
Bound on the curvature of the Isgur-Wise function of the baryon semileptonic decay Λ b → Λ c ℓν ℓ Abstract In the heavy quark limit of QCD, using the Operator Product Expansion , the formalism of Falk for hadrons of arbitrary spin, and the non-forward amplitude, as proposed by Uraltsev, we formulate sum rules involving the Isgur-Wise function ξ Λ (w) of the baryon transition Λ b → Λ c ℓν ℓ , wh...
متن کاملA ug 2 00 8 Bound on the curvature of the Isgur - Wise function of the baryon semileptonic decay Λ
Bound on the curvature of the Isgur-Wise function of the baryon semileptonic decay Λ b → Λ c ℓν ℓ Abstract In the heavy quark limit of QCD, using the Operator Product Expansion , the formalism of Falk for hadrons or arbitrary spin, and the non-forward amplitude, as proposed by Uraltsev, we formulate sum rules involving the Isgur-Wise function ξ Λ (w) of the baryon transition Λ b → Λ c ℓν ℓ , wh...
متن کاملبررسی برهم‌کنش کائون- دوترون و ساختار تشدید (1405) Λ با استفاده از روش فدیف
In this paper, we have investigated the kaon-deuteron interaction at an incident momentum of 1 GeV/c using the relativistic and non-relativistic Faddeev method for different phenomenological and chiral potentials. By calculating the π∑ invariant mass spectra on different particle channels, we have shown that the trace of Λ(1405) resonance is visible in such spectra. In the present work, the st...
متن کاملSum Rules Calculation of Heavy Λ Semileptonic Decay
We set up sum rules for heavy lambda decays in a full QCD calculation which in the heavy quark mass limit incorporates the symmetries of heavy quark effective theory. For the semileptonic Λ c decay we obtain a reasonable agreement with experiment. For the Λ b semileptonic decay we find at the zero recoil point a violation of the heavy quark symmetry of about 20%.
متن کاملNon - factorizable terms , heavy quark masses , and semileptonic decays of D and B mesons
Non-factorizable terms, heavy quark masses, and semileptonic decays of D and B mesons. Abstract The non-factorizable terms in the operator product expansion have been recognized as one of theoretical obstacles for precision determination of the mixing parameter V ub from semileptonic B decays. It is pointed out here that the recent CLEO data on the parameters of the heavy quark expansion λ 1 an...
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:
دوره شماره
صفحات -
تاریخ انتشار 1996