WIMP dark matter inflation with observable gravity waves

Unlike the Noether symmetry, a metric independent general conserved current exists for non-minimally coupled scalar-tensor theory of gravity if the trace of the energymomentum tensor vanishes. Thus, in the context of cosmology, a symmetry exists both in the early vacuum and radiation dominated era. For slow roll, symmetry is sacrificed, but at the end of early inflation, such a symmetry leads to a Friedmann-like radiation era. Late-time cosmic acceleration in the matter dominated era is realized in the absence of symmetry, in view of the same decayed and redshifted scalar field. Thus, unification of early inflation with late-time cosmic acceleration with a single scalar field may be realized.

“…Inflation with such a non-minimal coupling has been undergoing serious investigation over the decades [23,[46][47][48][49][50][51][52][53][54][55].…”

Section: Early Universementioning

confidence: 99%

Unified cosmology with scalar–tensor theory of gravity

Tajahmad

Sanyal

2017

“…2 It is interesting to apply the same idea as the SM Higgs inflation to the general Higgs model and identify the Higgs field of the model (not the SM Higgs field) as the inflaton in the presence of non-minimal gravitational coupling. For a simple example, see [37].…”

Section: Introductionmentioning

confidence: 99%

Running non-minimal inflation with stabilized inflaton potential

Okada

Raut

2017

Self Cite

In the context of the Higgs model involving gauge and Yukawa interactions with the spontaneous gauge symmetry breaking, we consider λφ 4 inflation with nonminimal gravitational coupling, where the Higgs field is identified as the inflaton. Since the inflaton quartic coupling is very small, once quantum corrections through the gauge and Yukawa interactions are taken into account, the inflaton effective potential most likely becomes unstable. In order to avoid this problem, we need to impose stability conditions on the effective inflaton potential, which lead to not only non-trivial relations amongst the particle mass spectrum of the model, but also correlations between the inflationary predictions and the mass spectrum. For concrete discussion, we investigate the minimal B − L extension of the standard model with identification of the B − L Higgs field as the inflaton. The stability conditions for the inflaton effective potential fix the mass ratio amongst the B − L gauge boson, the right-handed neutrinos and the inflaton. This mass ratio also correlates with the inflationary predictions. In other words, if the B − L gauge boson and the right-handed neutrinos are discovered in the future, their observed mass ratio provides constraints on the inflationary predictions.

“…Compared to the discussions in the previous Higgs portal inflation models [43][44][45][46][47][48][49], we focus on the particle phenomenology and use the recent Higgs data to discuss this concrete model. Constraints on the model parameters from experiments of cosmology and precise data of particle physics are also be discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

“…If the answer is yes, then it will be very promising to understand the new physics hidden in the Planck data. On the other hand, in recent years, there has been an extensive discussions of the Higgs inflation or the Higgs portal inflation [43][44][45][46][47][48][49] scenario, especially after the discovery of the Higgs-like particle in the SM at the LHC [50,51]. One distinctive motivation of the Higgs inflation theory is to explain the cosmological inflation in the SM model of particle physics without introducing any new field.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phenomenology of an extended Higgs portal inflation model after Planck 2013

Huang

Shao

et al. 2014

We consider an extended inflation model in the frame of Higgs portal model, assuming a nonminimal coupling of the scalar field to the gravity. Using the new data from Planck 2013 and other relevant astrophysical data, we obtain the relation between the nonminimal coupling ξ and the self-coupling λ needed to drive the inflation, and find that this inflationary model is favored by the astrophysical data. Furthermore, we discuss the constraints on the model parameters from the experiments of particle physics, especially the recent Higgs data at the LHC.