Supergravity gauge theories strike back: There is no crisis for SUSY but a new collider may be required for discovery

More than 30 years ago, Arnowitt–Chamseddine–Nath and others established the compelling framework of supergravity gauge theories (SUGRA) as a picture for the next step in beyond the standard model physics. We review the current SUGRA scenario in light of recent data from LHC8 collider searches and the Higgs boson discovery. While many SUSY and non-SUSY scenarios are highly disfavored or even excluded by LHC, the essential SUGRA scenario remains intact and as compelling as ever. For naturalness, some non-universality between matter and Higgs sector soft terms is required along with substantial trilinear soft terms. SUSY models with radiatively-driven naturalness are found with high scale fine-tuning at a modest

\sim 10\%

. In this case, natural SUSY might be discovered at LHC13 but could also easily elude sparticle search endeavors. A linear

{{e}^{+}}{{e}^{-}}

collider with

\sqrt{s}\gt 2m(higgsino)

is needed to provide the definitive search for the required light higgsino states which are the hallmark of natural SUSY. In the most conservative scenario, we advocate inclusion of a Peccei–Quinn sector so that dark matter is composed of a WIMP/axion admixture i.e. two dark matter particles.

Note:

Contribution to The Proceedings of the Richard Arnowitt Memorial Symposium; 18 pages with 17 figures; revised version includes 3 added figures and some typo corrections; v3 includes some added references and one updated figure

new physics
supergravity
supersymmetry: symmetry breaking
supersymmetry: dark matter
naturalness
Higgs particle: mass
stop: mixing
stop: coupling
axion: dark matter
WIMP: dark matter

References(228)

Figures(0)

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