Stealth supersymmetry

By JiJi Fan, Michael J. Reece, J. Ruderman. 2011

186 citations recorded by the source corpus.

We present a broad class of supersymmetric models that preserve R-parity but lack missing energy signatures. These models are significantly less constrained than traditional supersymmetry by emerging LHC limits that rely on missing energy signatures, and therefore require less tuning to accommodate experimental results. They 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. This scenario is natural, lacks artificial tunings to produce a squeezed spectrum, and is consistent with gauge coupling unification. The resulting collider signals will be jet-rich events containing false resonances that could resemble signatures of R-parity violation. We discuss concrete examples of the general idea, and emphasize γjj resonances, displaced vertices, and very large numbers of b-jets as possible discovery modes.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/df6190eb5218e7e5a678db31d1bb74b46962f0d6

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Citations in the corpus

A non Standard Model Higgs at the LHC as a sign of naturalness (2011, background): “Even though current LHC searches exclude the possibility of universal squark spectra up to almost 1 TeV (∼500 GeV with a heavy neutralino), stops can be perhaps as light as the top in models with non-universal squark masses [4] or when SUSY is hidden, for example see [10].”
Naturalness and the Status of Supersymmetry (2013, background): “Interesting possibilities in which cascade decays go through hidden sectors include hidden valley models [158, 159] and stealth supersymmetry [160].”
The State of Supersymmetry after Run I of the LHC (2013, background): “It’s therefore quite interesting to consider stealth supersymmetry, a systematically robust scenario in which the MET signal is reduced [55, 56].”
Natural SUSY endures (2011, background): “However, it should be kept in mind that the compression itself may be a new form of tuning (in the form of a relation between the colored superpartner and LSP mass) depending on the UV completion, therefore it is not totally clear whether or not compressed MSSM spectra are really more natural (exten”
Doubling down on naturalness with a supersymmetric twin Higgs (2013, background): “While there is also still room for conventional supersymmetric models with light superpartners whose signatures are muddled by reduced event activity [6] or missing energy [7], these solutions are under increasing pressure from evolving search strategies at the LHC – and, in any event, have little i”
Discovering uncolored naturalness in exotic Higgs decays (2015, background): “For example, various R-parity violating scenarios or non-minimal models like Stealth SUSY [17] can remain natural while protecting the Higgs mass.”
Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector (2015, background): “Additional scenarios with LLPs include hidden-valley [7], dark-sector gauge bosons [8], and stealth supersymmetry [9].”
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, methodology): “Example: a singlino decaying to a singlet (which decays to γγ) and a gravitino in Stealth SUSY [51].”