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考虑到电弱精确测量数据对标量轻子夸克(SLQ)自由参数的限制,研究此类新粒子对稀有衰变Λ_b→Λl~+l~-(l=e,μ和τ)的量子修正.我们的计算结果表明:由于当前实验数据对参数|λ~(31λ)~(21)*|/M_(LQ)~2的限制是非常小,SLQ对Λ_b→Λe~+e~-衰变过程的贡献很大.如果在不久的将来,分支比Br(Λ_b→Λμ~+μ~-)在LHCb上可以得到更精确的测量,那么SLQ的间接信号就可能通过此衰变在LHCb上观测到.
Considering the limit of the free parameter of the scalar lepton quark (SLQ) due to the weakly measured data, we study the quantum correction of the rare-earth Λ_b → Λl ~ + l ~ (l = e, μ and τ) The calculation results show that the limit of the parameter | λ ~ (31λ) ~ (21) * | / M_ (LQ) ~ 2 is very small and the contribution of SLQ to Λ_b → Λe ~ + e ~ -decay process If the branching ratio Br (Λ_b → Λμ ~ + μ ~ -) can get a more accurate measurement on the LHCb in the near future, the indirect signal of SLQ may be observed on the LHCb through this decay.