HUSSAIN, F , INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY.
部门归属:
UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY; UNIV TRIESTE,DEPT THEORET PHYS,TRIESTE,ITALY; CHINESE ACAD SCI,INST THEORET PHYS,BEIJING,PEOPLES R CHINA
英文摘要:
We present a complete analysis of the heavy to heavy and heavy to light baryon semi-leptonic decays in the heavy quark effective theory within the framework of a Bethe-Salpeter (BS) approach and demonstrate the equivalence of this approach to other work in the field. We present in a compact form the baryon BS amplitudes which incorporate the symmetries manifest in the heavy quark limit and which also show clearly the light quark dynamics. A similar form of the BS amplitude is presented for light baryons. Using the BS amplitudes, the heavy to heavy and heavy to light semi-leptonic baryon decays are considered. As expected there is a dramatic reduction in the number of form factors. An advantage of our BS approach is demonstrated where the form factors are written as loop integrals which in principle can be calculated.
HUSSAIN, F,LIU, DS,KRAMER, M,et al. GENERAL-ANALYSIS OF WEAK DECAY FORM-FACTORS IN HEAVY TO HEAVY AND HEAVY TO LIGHT BARYON TRANSITIONS[J]. NUCLEAR PHYSICS B,1992,370(2):259-277.
