Improved analysis of the rare decay processes of Λb

Ren-hao Deng,Yong-lu Liu,Ming-qiu Huang

Table 4. Branch ratios of the decay process ${{\rm{\Lambda }}}_{b}\to {\rm{\Lambda }}{l}^{+}{l}^{-}$ from different models.

${\rm{Model}}$ $\mathrm{Branch}\,\mathrm{Ratio}$ ${\rm{CZ-type}}\,{\rm{current}}$ $4.61\times {10}^{-6}$ ${\rm{Ioffe-type}}\,{\rm{current}}$ $1.20\times {10}^{-6}$ ${\rm{LCSR}}$ [49] $(4.6\pm 1.6)\times {10}^{-6}$ ${\rm{HQET}}$ [47] $(2.23\sim 3.34)\times {10}^{-6}$ ${\rm{PDG}}$ [1] $(1.08\pm 0.28)\times {10}^{-6}$