We present a successful inflation model based on $\lambda {\varphi }^4$ potential in which a standard model (SM) singlet inflaton $\varphi$, with mass of around a TeV or less, also plays the role of a weakly interacting scalar dark matter particle (WIMP). The WIMP relic abundance generated after inflation is in accord with the current observations. The spectral index $n_s$ lies within the Wilkinson Microwave Anisotropy Probe (WMAP) satellite $1\mathrm{\text{−}}\sigma$ bounds, while the Planck satellite may observe the tensor-to-scalar ratio, a canonical measure of gravity waves, which we estimate lies between 0.003 and 0.007. An unbroken $Z_2$ parity ensures that the scalar WIMP is absolutely stable.

• Received 21 July 2010

DOI:https://doi.org/10.1103/PhysRevD.84.043533