Axino mass in supergravity models

  • Chun E
  • Lukas A
  • 2


    Mendeley users who have this article in their library.
  • 130


    Citations of this article.


We analyze the mass of the axino, the fermionic superpartner of the axion, in general supergravity models incorporating a Peccei-Quinn symmetry and determine the cosmological constraints on this mass. In particular, we derive a simple criterion to identify models with an LSP axino which has a mass of O( m3 22f{hook}PQ) = O (keV) and can serve as a candidate for (warm) dark matter. We point out that such models have very special properties and in addition, the small axino mass has to be protected against radiative corrections by demanding small couplings in the Peccei-Quinn sector. Generically, we find an axino mass of order m3 2. Such masses are constrained by the requirement of an axino decay which occurs before the decoupling of the ordinary LSP. Especially, for a large Peccei-Quinn scale fPQ> 1011GeV this constraint might be difficult to fulfill. © 1995.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • E. J. Chun

  • A. Lukas

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free