Minimal supersymmetric standard model with gauge mediated supersymmetry breaking and neutrinoless doubleβdecay

Abstract

The Minimal Supersymmetric Standard Model with gauge mediated supersymmetry breaking and trilinear R-parity violation is applied to the description of neutrinoless double beta decay. A detailed study of limits on the parameter space coming from the B → Xsγ processes by using the recent CLEO results is performed. The importance of two-nucleon and pion-exchange realizations of 0νββ decay together with gluino and neutralino contributions to this process are addressed. We have deduced new limits on the trilinear R-parity breaking parameter λ ′ 111 from the non-observability of 0νββ in several medium and heavy open-shell nuclei for different gauge mediated breaking scenarios. In general, they are stronger than those known from other analyses. Also some studies with respect to the future 0νββ projects are presented.

Majorana neutrino magnetic moments in the gauge-mediated supersymmetry breaking MSSM

“…The whole procedure of obtaining the low-energy spectrum is explained in great detail in Ref. [18] and here we will recall the basic steps only. Everything starts with evolving all gauge and Yukawa couplings up to the messenger scale M .…”

“…The full discussion of the allowed parameter range for our model, coming from these constraints, is discussed in Ref. [18].…”

Neutrino mass in GUT constrained supersymmetry withR−parityviolation in light of neutrino oscillations

“…Next restriction comes from the requirement of positive eigenvalues of mass matrices squared at the electroweak scale. The last requirement (see, e.g., [15] for details) comes from the strongly experimentally suppressed FCNC processes and provides the most severe constraints.…”

“…All the running parameters are obtained by using the renormalization group equations (RGE) [14,15]. At the beginning, one evolves all gauge and Yukawa couplings for three generations up to the GUT scale M GUT ∼ 10 16 GeV.…”