QCD sum rules analysis of weak decays of doubly heavy baryons: the $$b\rightarrow c$$ processes
نویسندگان
چکیده
A comprehensive study of $b\to c$ weak decays doubly heavy baryons is presented in this paper. The transition form factors as well the pole residues initial and final states are respectively obtained by investigating three-point two-point correlation functions QCD sum rules. Contributions from up to dimension-6 operators considered for functions. then applied a phenomenological analysis semi-leptonic decays.
منابع مشابه
Weak Decays of Doubly Heavy Baryons: SU(3) Analysis
Motivated by the recent LHCb observation of doubly-charmed baryon Ξ cc in the Λc K −π+π+ final state, we analyze the weak decays of doubly heavy baryons Ξcc, Ωcc, Ξbc, Ωbc, Ξbb and Ωbb under the flavor SU(3) symmetry. Decay amplitudes for various semileptonic and nonleptonic decays are parametrized in terms of a few SU(3) irreducible amplitudes. We find a number of relations or sum rules betwee...
متن کاملDoubly heavy baryons in sum rules of NRQCD
The masses of baryons containing two heavy quarks and their couplings to the corresponding quark currents are evaluated in the framework of NRQCD sum rules. The coulomb-like corrections in the system of doubly heavy diquark are taken into account, and the contribution of nonperturbative terms coming from the quark, gluon and mixed condensates as well as the product of quark and gluon condensate...
متن کاملDecays in QCD Sum Rules
The form factors relevant to Bq → D∗ q(J = 1−)lν (q = s, d, u) decays are calculated in the framework of the three point QCD sum rules approach. The heavy quark effective theory prediction of the form factors as well as 1/mb corrections to those form factors are obtained. A comparison of the results for the ratio of form factors at zero recoil limit and other values of q2 with the predictions o...
متن کاملDecays and Lifetime of B c in QCD Sum Rules
In the framework of three-point QCD sum rules, the form factors for the semileptonic decays of B + c → B s (B * s)l + ν l are calculated with account for the Coulomb-like α s /v-corrections in the heavy quarkonium. The generalized relations due to the spin symmetry of HQET/NRQCD for the form factors are derived at the recoil momentum close to zero. The nonleptonic decays are studied using the a...
متن کاملWeak Semileptonic Decays of Heavy Baryons Containing Two Heavy Quarks
In the heavy quark limit a heavy baryon which contains two heavy quarks is believed to be composed of a heavy diquark and a light quark. Based on this picture, we evaluate the weak semileptonic decay rates of such baryons. The transition form factors between two heavy baryons are associated with those between two heavy mesons by applying the super avor symmetry. The e ective vertices of the W-b...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: European Physical Journal C
سال: 2021
ISSN: ['1434-6044', '1434-6052']
DOI: https://doi.org/10.1140/epjc/s10052-021-09902-2