Review of axino dark matter

Abstract

We review the status of axino dark matter. Two hierarchy problems, the strong CP problem and the gauge hierarchy problem, have led to introducing into particle physics a spontaneously broken global Peccei-Quinn symmetry and a softly broken supersymmetry, respectively. Combining them implies the presence of not only an axion, but also of its scalar component, saxion, and their fermionic partner, axino. Among these, the axion and the axino are attractive dark matter candidates. Various possibilities for the axino as dark matter are discussed.

11 pages, 6 figures

References in corpus (22)

• Observation of an anomalous positron abundance in the cosmic radiation
• Asymmetric Dark Matter
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• Particle physics catalysis of thermal Big Bang Nucleosynthesis
• Flipped SU(5) from Z_{12-I} orbifold with Wilson line
• Axino dark matter from Q-balls in Affleck-Dine baryogenesis and the ${\Omega }_b-{\Omega }_{DM}$ coincidence problem
• Cosmological implications of supersymmetric axion models
• Axinos as Dark Matter Particles
• Gravitino Dark Matter and general neutralino NLSP
• The number density of a charged relic
• Axino Light Dark Matter and Neutrino Masses with R-parity Violation
• Determining Reheating Temperature at Colliders with Axino or Gravitino Dark Matter
• Thermal inflation, baryogenesis and axions
• Dark Radiation Constraints on Mixed Axion/Neutralino Dark Matter
• Abelian discrete symmetries Z_{N} and Z_{nR} from string orbifolds
• Axions and saxions from the primordial supersymmetric plasma and extra radiation signatures
• Quintessential Kination and Thermal Production of Gravitinos and Axinos
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line
• Natural Higgs-flavor-democracy solution of the mu problem of supersymmetry and the QCD axion
• Axion model in gauge-mediated supersymmetry breaking and a solution to the mu/Bmu problem
• Upper Limits on the Peccei-Quinn Scale and on the Reheating Temperature in Axino Dark Matter Scenarios
• Flaxino dark matter and stau decay

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