Long lived charginos in Natural SUSY?

Understand

Supersymmetric models with a small neutralino-chargino mass difference, and as a result metastable charginos, have been a popular topic of investigation in collider phenomenology, e.g.

• in anomaly-mediated models of supersymmetry breaking.
• Recently, the absence of any supersymmetric signal at the 8 TeV LHC data has led to significant interest in the so-called Natural SUSY models with light higgsinos.
• These models also have a naturally small neutralino-chargino mass difference.