Articulo
ΔL = 2 hyperon semileptonic decays
Registro en:
issn:1550-7998
issn:1550-2368
Autor
Barbero, César Alberto
Li, Ling-Fong
López Castro, G.
Mariano, Alejandro Edgardo
Institución
Resumen
We compute the rates of semileptonic B<sub>A</sub> → B<sub>B</sub>l⁻l⁻ (l = e or μ) hyperon transitions in a model where intermediate states involve loops of baryons and a Majorana neutrino. These rates turn out to be well below present experimental bounds and other theoretical estimates. From the experimental upper limit on the Ξ⁻ → pμ⁻μ⁻ decay, we derive the bound <m <sub>μμ</sub>> ≤ 22 TeV for the effective Majorana mass of the muon neutrino. Also, an estimate of background contributions for these decays due to the allowed B<sub>A</sub> → B<sub>B</sub>l⁻l⁻ ν⁻ν⁻ decays is provided. Facultad de Ciencias Exactas