Open AccessA dark matter solution from the supersymmetric axion model
Author(s) -
Sanghyeon' b'Chang,
Hang Bae' b'Kim
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/228215
Subject(s) - physics , axion , dark matter , particle physics , superpartner , cold dark matter , lightest supersymmetric particle , mixed dark matter , supersymmetry , hubble's law , light dark matter , scalar field dark matter , warm dark matter , hot dark matter , standard model (mathematical formulation) , dark radiation , minimal supersymmetric standard model , astrophysics , dark energy , cosmology , archaeology , gauge (firearms) , history
We study the effect of the late decaying saxino (the scalar superpartner of the axion) and find out that there is a possible dark matter solution from a class of supersymmetric extensions of the invisible axion model. In this class of models, the saxino which decays into two axions acts as the late decaying particle which reconciles the cold dark matter model with high values of the Hubble constant. Recent observations of the Hubble constant are converging to H{sub 0} = 70--80 km sec{sup {minus}1} Mpc{sup {minus}1}, which would be inconsistent with the standard mixed dark matter model. This class of models provides a plausible framework for the alternative cold dark matter plus late decaying particle model, with the interesting possibility that both cold dark matter and the extra radiation consist of axion. 15 refs