Axino

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]

References

  1. ↑ Abe, Nobutaka; Moroi, Takeo; Yamaguchi, Masahiro (2002). "Anomaly-Mediated Supersymmetry Breaking with Axion". Journal of High Energy Physics. 1: 10. arXiv:hep-ph/0111155Freely accessible. Bibcode:2002JHEP...01..010A. doi:10.1088/1126-6708/2002/01/010.
  2. ↑ Hooper, Dan; Wang, Lian-Tao (2004). "Possible evidence for axino dark matter in the galactic bulge". Physical Review D. 70 (6): 063506. arXiv:hep-ph/0402220Freely accessible. Bibcode:2004PhRvD..70f3506H. doi:10.1103/PhysRevD.70.063506.
  3. ↑ Baryakhtar, Masha; Hardy, Edward; March-Russell, John (2013). "Axion Mediation". JHEP. 1307: 096. arXiv:1301.0829Freely accessible. Bibcode:2013JHEP...07..096B. doi:10.1007/JHEP07(2013)096.
This article is issued from Wikipedia - version of the 11/3/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.