Singlet Portal to the Hidden Sector
arXiv:1008.5153 · doi:10.1007/JHEP11(2010)103
Abstract
Ultraviolet physics typically induces a kinetic mixing between gauge singlets which is marginal and hence non-decoupling in the infrared. In singlet extensions of the minimal supersymmetric standard model, e.g. the next-to-minimal supersymmetric standard model, this furnishes a well motivated and distinctive portal connecting the visible sector to any hidden sector which contains a singlet chiral superfield. In the presence of singlet kinetic mixing, the hidden sector automatically acquires a light mass scale in the range 0.1 - 100 GeV induced by electroweak symmetry breaking. In theories with R-parity conservation, superparticles produced at the LHC invariably cascade decay into hidden sector particles. Since the hidden sector singlet couples to the visible sector via the Higgs sector, these cascades necessarily produce a Higgs boson in an order 0.01 - 1 fraction of events. Furthermore, supersymmetric cascades typically produce highly boosted, low-mass hidden sector singlets decaying visibly, albeit with displacement, into the heaviest standard model particles which are kinematically accessible. We study experimental constraints on this broad class of theories, as well as the role of singlet kinetic mixing in direct detection of hidden sector dark matter. We also present related theories in which a hidden sector singlet interacts with the visible sector through kinetic mixing with right-handed neutrinos.
12 pages, 5 figures
References in corpus (13)
- A Theory of Dark Matter
- Secluded WIMP Dark Matter
- Secluded U(1) below the weak scale
- New Fixed-Target Experiments to Search for Dark Gauge Forces
- Non-Abelian Dark Sectors and Their Collider Signatures
- Probing a Secluded U(1) at B-factories
- Probing Dark Forces and Light Hidden Sectors at Low-Energy e+e- Colliders
- Kinetic Mixing as the Origin of Light Dark Scales
- Possible Effects of a Hidden Valley on Supersymmetric Phenomenology
- Breaking the Dark Force
- Dark matter and sub-GeV hidden U(1) in GMSB models
- Measuring the Dark Force at the LHC
- The Goldstini Variations