Minimal hidden sector models for CoGeNT/DAMA events

Journal Article · Sat Oct 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.075003· OSTI ID:21607806

Cline, James M ^[1]; Frey, Andrew R ^[2]

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1. Physics Department, McGill University, Montreal, QC, H3A2T8 (Canada)
2. Department of Physics and Winnipeg Insitute for Theoretical Physics, University of Winnipeg, Winnipeg, MB, R3B2E9 (Canada)

Motivated by recent attempts to reconcile hints of direct dark matter detection by the CoGeNT and DAMA experiments, we construct simple particle physics models that can accommodate the constraints. We point out challenges for building reasonable models and identify the most promising scenarios for getting isospin violation and inelasticity, as indicated by some phenomenological studies. If inelastic scattering is demanded, we need two new light gauge bosons, one of which kinetically mixes with the standard model hypercharge and has mass <2 GeV, and another which couples to baryon number and has mass 6.8{+-}(0.1/0.2) GeV. Their interference gives the desired amount of isospin violation. The dark matter is nearly Dirac, but with small Majorana masses induced by spontaneous symmetry breaking, so that the gauge boson couplings become exactly off-diagonal in the mass basis, and the small mass splitting needed for inelasticity is simultaneously produced. If only elastic scattering is demanded, then an alternative model, with interference between the kinetically mixed gauge boson and a hidden sector scalar Higgs, is adequate to give the required isospin violation. In both cases, the light kinetically mixed gauge boson is in the range of interest for currently running fixed target experiments.

• OSTI ID: 21607806
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 7; Other Information: DOI: 10.1103/PhysRevD.84.075003; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON NUMBER
COUPLING
ELASTIC SCATTERING
GEV RANGE 01-10
HIGGS BOSONS
HIGGS MODEL
HYPERCHARGE
INELASTIC SCATTERING
INTERFERENCE
ISOSPIN
MAJORANA THEORY
MASS
NONLUMINOUS MATTER
STANDARD MODEL
SYMMETRY BREAKING
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GEV RANGE
GRAND UNIFIED THEORY
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SCATTERING
UNIFIED GAUGE MODELS