=====  Jiji Fan =====
==== Stealth supersymmetry ====
 Sep. 20, 2011

We present a broad class of supersymmetric models that preserve R-parity but lack missing energy signatures. These models have new light particles with weak-scale supersymmetric masses that feel SUSY breaking only through couplings to the MSSM. This small SUSY breaking leads to nearly degenerate fermion/boson pairs, with small mass splittings and hence small phase space for decays carrying away invisible energy. The simplest scenario has low-scale SUSY breaking, with missing energy only from soft gravitinos. 

{{2011:sep:fan.pdf |pdf file}} {{2011:sep:fan.mp4 |mp4 file}}