Status of sub-GeV Hidden Particle Searches

Abstract

Hidden sector particles with sub-GeV masses like hidden U(1) gauge bosons, the NMSSM CP-odd Higgs, and other axion-like particles are experimentally little constrained as they interact only very weakly with the visible sector. For masses below the muon threshold, we present constraints from meson decays, g - 2 as well as beam-dump and reactor experiments. The NMSSM CP-odd Higgs and generally any pseudoscalar is required to be heavier than 210 MeV or couple to fermions much weaker than the SM Higgs. Hidden photons are less constrained and can be searched for at future fixed-target experiments, e.g. HIPS at DESY.

4 pages, 2 figures, contribution to 6th Patras Workshop on Axions, WIMPs and WISPs, Zurich University, Switzerland, 5-9 July 2010

References in corpus (7)

• A Theory of Dark Matter
• Secluded U(1) below the weak scale
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Probing Dark Forces and Light Hidden Sectors at Low-Energy e+e- Colliders
• Kinetic Mixing as the Origin of Light Dark Scales
• New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios
• Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess