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Title: Axino  
Author: World Heritage Encyclopedia
Language: English
Subject: Dark matter, Chameleon particle, Fermions, Mixed dark matter, Halo mass function
Publisher: World Heritage Encyclopedia


The axino is a hypothetical elementary particle predicted by some theories of particle physics. Peccei–Quinn theory attempts to explain the observed phenomenon known as the strong CP problem by introducing a hypothetical real scalar particle called the axion. Adding supersymmetry to the model predicts the existence of a fermionic superpartner for the axion, the axino, and a bosonic superpartner, the saxion. They are all bundled up in a chiral superfield.

The axino has been predicted to be the lightest supersymmetric particle in such a model.[1] In part due to this property, it is considered a candidate for the composition of dark matter.[2]

The supermultiplet containing an axion and axino has been suggested as the origin of supersymmetry breaking, where the supermultiplet gains an F-term expectation value. [3]


  1. ^ Abe, Nobutaka; Moroi, Takeo; Yamaguchi, Masahiro (2002). "Anomaly-Mediated Supersymmetry Breaking with Axion".  
  2. ^ Hooper, Dan; Wang, Lian-Tao (2004). "Possible evidence for axino dark matter in the galactic bulge".  
  3. ^ Baryakhtar, Masha; Hardy, Edward; March-Russell, John (2013). "Axion Mediation".  
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