Abstract
We present predictions for the four-leptonic decays of B−-mesons with three light charged leptons and one neutrino in the final states. We obtain the branching ratio for decay at the level 1.3 × 10−7 taking into account the photon emission from the u- and b- valence quarks of B− –meson and the Bremsstrahlung. The contribution of the virtual photon was calculated using the Vector Meson Dominance model (VMD). As a next step we present prediction for branching ratio of the decay and the estimation for .
Highlights
The investigation of rare four leptonic decays of the B-mesons provides an important test of the Standard Model (SM) and its possible extensions in the high order of the perturbation theory
The total Hamiltonian for four-leptonic decays B− → + − − νin the Standard Model is given by following expression: Htot(x) = Hub(x) + Hem(x) + HVMD(x)
In this case we described the photon emissions via Vector Meson Dominance model (VMD) includes the intermediate ρ0(770) and ω(782) mesons
Summary
The investigation of rare four leptonic decays of the B-mesons provides an important test of the Standard Model (SM) and its possible extensions in the high order of the perturbation theory. The branching ratios of these decays are sufficiently sensitive to the contribution of the ”New Physics”. It is very important to precisely predict different characteristics of the B-mesons decays. Four-lepton B-decays are investigated at the LHCb, CMS and ATLAS experiments at LHC. Only upper limits on the branching ratios for the decays Bd,s → μ+μ−μ+μ− were obtained at the LHCb [1, 2]. The total Hamiltonian for four-leptonic decays B− → + − − νin the Standard Model is given by following expression: Htot(x) = Hub(x) + Hem(x) + HVMD(x).
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