Lee, JP , Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea.
部门归属:
Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea; Seoul Natl Univ, Ctr Theoret Phys, Seoul 151742, South Korea; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Korea Inst Adv Study, Seoul 130012, South Korea
英文摘要:
The decay of Lambda(b) --> Sigma(c)((*)) pi/<(nu)over bar> processes is calculated in the framework of heavy baryon chiral perturbation theory with the help of the 1/N-c expansion. The decay rate distributions over nu . nu' where nu and nu' are the four-vector velocities of Lambda(b) and Sigma(c)((*)), respectively, and over the pion and lepton energies, are given. The decay branching ratios amount to about 1.21(0.971)% for Lambda(b)-->Sigma(c) pi/<(nu)over bar> and 0.798(0.640)% for Lambda(b)-->Sigma(c)* pi/<(nu)over bar> by using the baryonic Isgur-Wise function predicted by QCD sum rules (large N-c QCD).
Lee, JP,Liu, C,Song, HS. Lambda b ->Sigma((*))(c) pi l(nu)over-bar in the heavy quark, chiral, and large N-c limits[J]. PHYSICAL REVIEW D,2000,61(1):-.
