Collider signals from slow decays in supersymmetric models with an intermediate-scale solution to the mu problem

Abstract

The problem of the origin of the mu parameter in the Minimal Supersymmetric Standard Model can be solved by introducing singlet supermultiplets with non-renormalizable couplings to the ordinary Higgs supermultiplets. The Peccei-Quinn symmetry is broken at a scale which is the geometric mean between the weak scale and the Planck scale, yielding a mu term of the right order of magnitude and an invisible axion. These models also predict one or more singlet fermions which have electroweak-scale masses and suppressed couplings to MSSM states. I consider the case that such a singlet fermion, containing the axino as an admixture, is the lightest supersymmetric particle. I work out the relevant couplings in several of the simplest models of this type, and compute the partial decay widths of the next-to-lightest supersymmetric particle involving leptons or jets. Although these decays will have an average proper decay length which is most likely much larger than a typical collider detector, they can occasionally occur within the detector, providing a striking signal. With a large sample of supersymmetric events, there will be an opportunity to observe these decays, and so gain direct information about physics at very high energy scales.

24 pages, LaTeX, 4 figures

References in corpus (1)

• Dimensionless supersymmetry breaking couplings, flat directions, and the origin of intermediate mass scales

Cited by in corpus (29)

• The Next-to-Minimal Supersymmetric Standard Model
• Axino dark matter from thermal production
• Freeze-In Dark Matter with Displaced Signatures at Colliders
• NMSDECAY: A Fortran Code for Supersymmetric Particle Decays in the Next-to-Minimal Supersymmetric Standard Model
• Phenomenology of a New Minimal Supersymmetric Extension of the Standard Model
• Axino Dark Matter and the CMSSM
• Midi-review: Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches
• Revisiting the SUSY mu problem and its solutions in the LHC era
• The Neutralino Sector of the Next-to-Minimal Supersymmetric Standard Model
• Thermal inflation, baryogenesis and axions
• Gravitino or Axino Dark Matter with Reheat Temperature as high as $10^{16}$ GeV
• A natural Little Hierarchy for SUSY from radiative breaking of PQ symmetry
• Cosmological constraints on a Peccei-Quinn flatino as the lightest supersymmetric particle
• Gravity safe, electroweak natural axionic solution to strong CP and SUSY mu problems
• Mitigating Moduli Messes in Low-Scale SUSY Breaking
• The LHC higgsino discovery plane for present and future SUSY searches
• Implications of an axino LSP for naturalness
• Stop Decay into Right-handed Sneutrino LSP at Hadron Colliders
• Quirks in supersymmetry with gauge coupling unification
• High-quality axions in solutions to the $\mu$ problem
• Axion model in gauge-mediated supersymmetry breaking and a solution to the mu/Bmu problem
• Flaxino dark matter and stau decay
• Very Degenerate Higgsino Dark Matter
• Resolving the existence of Higgsinos in the LHC inverse problem
• Is the magnitude of the Peccei-Quinn scale set by the landscape?
• LHC Implications of the WIMP Miracle and Grand Unification
• Intermediate Scale Supersymmetric Inflation, Matter and Dark Energy
• Holomorphic selection rules, the origin of the mu term, and thermal inflation
• SUSY, Inflation and the Origin of Matter in the Universe