Study of semileptonic decay of ${\bar{B}}_{s}^{0} \rightarrow \phi {l}^{+}{l}^{-}$ in QCD sum rule

Ying-Quan Peng,Mao-Zhi Yang

Table 4. Form factors related to $\langle \phi (\varepsilon ,{p}_{2})| \bar{s}{\gamma }_{\nu }(1-{\gamma }_{5})b| {\bar{B}}_{s}^{0}({p}_{1})\rangle $.

${A}_{0}({q}^{2})$ ${A}_{1}({q}^{2})$ ${A}_{2}({q}^{2})$ $V({q}^{2})$ q2 = 0 0.30 ± 0.25 0.32 ± 0.07 0.30 ± 0.07 0.45 ± 0.10 $\,{q}^{2}\ne 0\,$ ${A}_{0}({q}^{2})=\tfrac{{A}_{0}(0)}{1-{q}^{2}/{\left({m}_{\mathrm{pole}}^{{A}_{0}}\right)}^{2}}$ A1(0) ${A}_{2}({q}^{2})=\tfrac{{A}_{2}(0)}{1-{q}^{2}/{\left({m}_{\mathrm{pole}}^{{A}_{2}}\right)}^{2}}$ $V({q}^{2})=\tfrac{V(0)}{1-{q}^{2}/{\left({m}_{\mathrm{pole}}^{V}\right)}^{2}}$ mpole 5.62 ± 2.38 GeV − 9.20 ± 0.40 GeV 5.59 ± 0.27 GeV