Grand unified theory constrained supersymmetry and neutrinoless double
  beta decay

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

We analyze the contributions to the neutrinoless double \(\beta\) decay (\(0\nu\beta\beta\)-decay) coming from the Grand Unified Theory (GUT) constrained Minimal Supersymmetric Standard Model (MSSM) with trilinear R-parity breaking. We discuss the importance of two-nucleon and pion-exchange realizations of the quark-level \(0\nu\beta\beta\)-decay transitions. In this context, the questions of reliability of the calculated relevant nuclear matrix elements within the Renormalized Quasiparticle Random Phase Approximation (pn-RQRPA) for several medium and heavy open-shell nuclei are addressed. The importance of gluino and neutralino contributions to \(0\nu\beta\beta\)-decay is also analyzed. We review the present experiments and deduce limits on the trilinear R-parity breaking parameter \(\lambda_{111}'\) from the non-observability of \(0\nu\beta\beta\)-decay for different GUT constrained SUSY scenarios. In addition, a detailed study of limits on the MSSM parameter space coming from the \(B \to X_s \gamma\) processes by using the recent CLEO and OPAL results is performed. Some studies in respect to the future \(0\nu\beta\beta\)-decay project GENIUS are also presented.

Related collections

Most cited references 8

Record: found
Abstract: found
Article: found

Is Open Access

Study of Constrained Minimal Supersymmetry

Leszek Roszkowski, Chris Kolda, G. L. Kane … (1993)

Taking seriously phenomenological indications for supersymmetry, we have made a detailed study of unified minimal SUSY, including effects at the few percent level in a consistent fashion. We report here a general analysis without choosing a particular unification gauge group. We find that the encouraging SUSY unification results of recent years do survive the challenge of a more complete and accurate analysis. Taking into account effects at the 5-10% level leads to several improvements of previous results, and allows us to sharpen our predictions for SUSY in the light of unification. We perform a thorough study of the parameter space. The results form a well-defined basis for comparing the physics potential of different facilities. Very little of the acceptable parameter space has been excluded by LEP or FNAL so far, but a significant fraction can be covered when these accelerators are upgraded. A number of initial applications to the understanding of the SUSY spectrum, detectability of SUSY at LEP II or FNAL, BR(\(b\to s\gamma\)), Width(\(Z\to b\bar b\)), dark matter, etc, are included in a separate section. We formulate an approach to extracting SUSY parameters from data when superpartners are detected. For small tan(beta) or large \(m_top\) both \(M_half\) and \(M_0\) are entirely bounded from above at O(1 tev) without having to use a fine-tuning constraint.