OKC colloquia
Supersymmetry and naturalness with implications for LHC, ILC, WIMP and axion searches
by
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Europe/Stockholm
FA31
FA31
Description
Weak scale supersymmetry (SUSY) has been, for many years, the dominant paradigm for physics beyond the Standard Model and in fact the simplest model predicted the Higgs mass to lie exactly in the range where it was discovered. And yet the community seems discouraged as to the likelihood of SUSY due to lack of superpartners at LHC and the somewhat large value of the Higgs mass:
these are thought to exacerbate the ``naturalness'' question. A more nuanced evaluation of electroweak naturalness points to a highly natural SUSY mass spectrum characterized by light Higgsino states with mass ~100-200 GeV. The suggested new particle mass spectrum:
1. gives rise to distinctive SUSY signatures at LHC but
2. might also escape LHC detection.
The critical machine to test natural SUSY--via pair production of higgsinos states--is an e+e- collider operating at CM energy 400-600 GeV: the International Linear Collider or ILC. Extending naturalness to the QCD sector, one expects two dark matter particles: the axion and a higgsino-like neutralino. Thus, detection of both an axion and a WIMP is to be expected. (Host: Jan Conrad)