Four-Leptonic Decays of Charged and Neutral B Mesons within the Standard Model

Abstract

The branching ratios and differential distributions for the four-leptonic decays \({B^ - } \to {\mu ^ + }{\mu ^ - }{\bar v_e}{e^ - }\), \({B^ - } \to {e^ + }{e^ - }{\bar v_\mu }{\mu ^ - }\), and \({B^ - } \to {\mu ^ + }{\bar v_\mu }{\mu ^ - }{\mu ^ - }\) are calculated within the Standard Model. The branching ratios for the rare decays B_d,s → e⁺e⁻μ⁺μ⁻ and B_d,s → μ⁺μ⁻μ⁺μ⁻ are estimated. Methods for testing the lepton universality in rare multileptonic decays of charged and neutral B mesons are proposed.