Prospects for Beyond the Standard Model Physics at the Start of the LHC13 era

Abstract

The discovery of the Higgs boson along with the vigorous confirmation of the SM coupled with non-appearance of new (SUSY) particles has led to an apparent naturalness crisis. We argue the crisis stems from overestimates of finetuning. A proper evaluation of naturalness in SUSY leads to light higgsinos with mass mu~ 100-300 GeV while other sparticles may inhabit the multi-TeV range at little cost to naturalness. Special signatures like dilepton mass edges in gluino pair events and same-sign dibosons from wino pairs might occur at LHC13. An ILC with \sqrt{s}>2 mu would make the definitive test of naturalness in the MSSM. Naturalness in the QCD sector requires the axion leading to mixed axion-WIMP dark matter. There appears a deep connection between electroweak naturalness and a DFSZ-like SUSY axion sector which gives rise to the mu~ f_a^2/M_P parameter. Ultimately we expect detection of a higgsino-like WIMP at ton-scale DM detectors and detection of a DFSZ-type axion at ADMX.

Comments: 15 pages plus 8 figures; transcript of invited talk at DIS2015 meeting, SMU, May, 2015; some references added for final version