Abstract
We consider a very simple extension of the standard model in which one or more gauge singlet scalars couples to the standard model via an interaction of the form H, where H is the standard model Higgs doublet. The thermal relic density of S scalars is calculated as a function of the coupling and the S scalar mass . The regions of the (,) parameter space which can be probed by present and future experiments designed to detect scattering of S dark matter particles from Ge nuclei, and to observe upward-moving muons and contained events in neutrino detectors due to high-energy neutrinos from annihilations of S dark matter particles in the Sun and the Earth, are discussed. Present experimental bounds place only very weak constraints on the possibility of thermal relic S scalar dark matter. The next generation of cryogenic Ge detectors and of large area ( ) neutrino detectors will be able to investigate most of the parameter space corresponding to thermal relic S scalar dark matter up to ≊50 GeV, while a 1 detector would in general be able to detect thermal relic S scalar dark matter up to ≊100 GeV and would be able to detect up to ≊500 GeV or more if the Higgs boson is lighter than 100 GeV.
- Received 22 November 1993
DOI:https://doi.org/10.1103/PhysRevD.50.3637
©1994 American Physical Society