Correlation between flavour violating decay of long-lived slepton and tau in the coannihilation scenario with Seesaw mechanism
arXiv:1102.1794 · doi:10.1103/PhysRevD.83.115005
Abstract
We investigate flavour violating decays of the long-lived lightest slepton and the tau lepton in the coannihilation region of the Minimal Supersymmetric Standard Model with a Seesaw mechanism to generate neutrino masses. We consider a situation where the mass difference between the lightest neutralino, as the Lightest Supersymmetric particle (LSP), and the lightest slepton, as the Next-to-LSP, is smaller than the mass of tau lepton. In this situation, the lifetime of the lightest slepton is very long and it is determined by lepton flavour violating (LFV) couplings because the slepton mainly consists of the lighter stau and the flavour conserving 2-body decay is kinematically forbidden. We show that the lifetime can change many orders of magnitude by varying the Yukawa couplings entering the Seesaw mechanism. We also show that branching ratio of LFV tau decays are strongly correlated with the lightest slepton lifetime. Therefore the branching ratios of LFV tau decays can be determined or constrained by measuring the slepton lifetime at the LHC experiment.
16 pages, 4 figures, 3 tables
References in corpus (26)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Oscillating neutrinos and mu --> e, gamma
- A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model
- Measurement of Neutrino Oscillation with KamLAND: Evidence of Spectral Distortion
- Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity
- Determination of Solar Neutrino Oscillation Parameters using 1496 Days of Super-Kamiokande-I Data
- Lepton-Flavor Violation via Right-Handed Neutrino Yukawa Couplings in Supersymmetric Standard Model
- Measurement of Neutrino Oscillation by the K2K Experiment
- Flavour physics of leptons and dipole moments
- Lepton-Flavor Violation in the Supersymmetric Standard Model with Seesaw-Induced Neutrino Masses
- Solar and Atmospheric Neutrino Oscillations and Lepton Flavor Violation in Supersymmetric Models with Right-handed Neutrinos
- Search for Supersymmetry in pp Collisions at 7 TeV in Events with Jets and Missing Transverse Energy
- A New Parametrization of the Seesaw Mechanism and Applications in Supersymmetric Models
- Search for supersymmetry using final states with one lepton, jets, and missing transverse momentum with the ATLAS detector in sqrt{s} = 7 TeV pp
- tau -> mu gamma and mu -> e gamma as probes of neutrino mass models
- Seesaw and Lepton Flavour Violation in SUSY SO(10)
- Charged Lepton Flavor Violating Decays: Leading Logarithmic Approximation versus Full RG Results
- Determining See-Saw Parameters from Weak Scale Measurements?
- A limit for the mu -> e gamma decay from the MEG experiment
- Large Solar Angle and Seesaw Mechanism: a Bottom-up Perspective
- Sleptonarium (Constraints on the CP and Flavour Pattern of Scalar Lepton Masses)
- Long life stau in the minimal supersymmetric standard model
- From weak-scale observables to leptogenesis
- Measuring Lepton Flavour Violation at LHC with Long-Lived Slepton in the Coannihilation Region
- Electric dipole moments from flavoured CP violation in SUSY
- Constraints on the rare tau decays from mu --> e gamma in the supersymmetric see-saw model