Testing supersymmetry with lepton flavor violating τ and μ decays

By E. Arganda, M. Herrero. 2005

153 citations recorded by the source corpus.

In this work the following lepton flavor violating {tau} and {mu} decays are studied: {tau}{sup -}{yields}{mu}{sup -}{mu}{sup -}{mu}{sup +}, {tau}{sup -}{yields}e{sup -}e{sup -}e{sup +}, {mu}{sup -}{yields}e{sup -}e{sup -}e{sup +}, {tau}{sup -}{yields}{mu}{sup -}{gamma}, {tau}{sup -}{yields}e{sup -}{gamma}, and {mu}{sup -}{yields}e{sup -}{gamma}. We work in a supersymmetric scenario consisting of the minimal supersymmetric standard model particle content, extended by the addition of three heavy right-handed Majorana neutrinos and their supersymmetric partners, and where the generation of neutrino masses is done via the seesaw mechanism. Within this context, a significant lepton flavor mixing is generated in the slepton sector due to the Yukawa neutrino couplings, which is transmitted from the high to the low energies via the renormalization group equations. This slepton mixing then generates via loops of supersymmetric particles significant contributions to the rates of l{sub j}{yields}3l{sub i} and the correlated l{sub j}{yields}l{sub i}{gamma} decays. We analyze here in full detail these rates in terms of the relevant input parameters, which are the usual minimal supergravity parameters and the seesaw parameters. For the l{sub j}{yields}3l{sub i} decays, a full one-loop analytical computation of all the contributing supersymmetric loops is presented. This completes and corrects previous computations in the literature. In the numerical analysismore » compatibility with the most recent experimental upper bounds on all these {tau} and {mu} decays, with the neutrino data, and with the present lower bounds on the supersymmetric particle masses are required. Two typical scenarios with degenerate and hierarchical heavy neutrinos are considered. We will show here that the minimal supergravity and seesaw parameters do get important restrictions from these {tau} and {mu} decays in the hierarchical neutrino case.« less

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/863052c93b582618efcb9aac76d1da308b66dbec

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

  1. Giovanni Signorelli
  2. Avelino Vicente
  3. L. Calibbi
  4. Takashi Toma

Citations in the corpus