4 December 2007 | Fedor Bezrukov, Mikhail Shaposhnikov
The Standard Model Higgs boson can serve as the inflaton field responsible for cosmic inflation. This paper argues that the Higgs field, when non-minimally coupled to gravity, can generate the observed cosmological perturbations and inflation without requiring new particles beyond those in the Standard Model. The non-minimal coupling allows the Higgs field to have a large self-coupling, which is essential for successful inflation. The model predicts the spectral index and tensor-to-scalar ratio of perturbations, which fall within the 1σ confidence level of WMAP-3 observations. The Higgs field's behavior in the Einstein frame leads to a flat potential, enabling chaotic inflation. The model's predictions for inflationary parameters are consistent with current observations, and the Higgs mass is related to the amplitude of primordial perturbations. The paper also discusses radiative corrections and their minimal impact on the flatness of the potential. The non-minimal coupling to gravity is shown to be stable under renormalization group running, and the model can be extended to include additional particles without introducing new energy scales. The results suggest that the Standard Model can naturally explain inflation, providing a connection between electroweak symmetry breaking and the large-scale structure of the universe. The paper concludes that the Standard Model, with a non-minimal coupling to gravity, can account for inflation without requiring new physics between the electroweak and Planck scales.The Standard Model Higgs boson can serve as the inflaton field responsible for cosmic inflation. This paper argues that the Higgs field, when non-minimally coupled to gravity, can generate the observed cosmological perturbations and inflation without requiring new particles beyond those in the Standard Model. The non-minimal coupling allows the Higgs field to have a large self-coupling, which is essential for successful inflation. The model predicts the spectral index and tensor-to-scalar ratio of perturbations, which fall within the 1σ confidence level of WMAP-3 observations. The Higgs field's behavior in the Einstein frame leads to a flat potential, enabling chaotic inflation. The model's predictions for inflationary parameters are consistent with current observations, and the Higgs mass is related to the amplitude of primordial perturbations. The paper also discusses radiative corrections and their minimal impact on the flatness of the potential. The non-minimal coupling to gravity is shown to be stable under renormalization group running, and the model can be extended to include additional particles without introducing new energy scales. The results suggest that the Standard Model can naturally explain inflation, providing a connection between electroweak symmetry breaking and the large-scale structure of the universe. The paper concludes that the Standard Model, with a non-minimal coupling to gravity, can account for inflation without requiring new physics between the electroweak and Planck scales.