$ΔL=2$ hyperon semileptonic decays

Details $ΔL=2$ hyperon semileptonic decays $ΔL=2$ hyperon semileptonic decays

2007-09-17

arxiv.org/abs/0709.2431v1

Phys.Rev.D76:116008,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure

Scientific paper

10.1103/PhysRevD.76.116008

We compute the rates of semileptonic B_A \to B_Bl^-l^- (l=e or \mu) 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 \Xi^- \to p\mu^-\mu^- decay, we derive the bound < 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_A \to B_Bl^-l^-\bar{\nu}\bar{\nu} decays are provided.

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