Inflation scenario driven by a low energy physics inflaton

Abstract

It is a longstanding desire of cosmologists, and particle physicists as well, to connect inflation to low energy physics, culminating, for instance, in what is known as Higgs inflation. The condition for the standard Higgs boson playing the role of the inflaton, and driving sucessfully inflation, is that it couples nonminimally with gravity. Nevertheless, cosmological constraints impose that the nonminimal coupling be large. This causes the loss of perturbative unitarity in a scale of energy far below the Planck one. Our aim in this work is to point out that inflaton potential containing a particular type of trilinear coupling involving the inflaton may circumvent this problem by realizing Higgs inflation with tiny nonminimal coupling of the inflaton with gravity. We then develop the idea within a toy model and implement it in the inverse type-II seesaw mechanism for small neutrinos masses.

Possible discrepancies between cosmological and electroweak observables in Higgs Inflation

“…Our results are in agreement with previous works [23,86,102], and allows us to conclude that the simplest realisation of the Higgs Inflation model [9] faces difficulties in reconciling cosmological data [35][36][37][38][39]94] to the observations at electroweak scale [40]. On the other side, small deviations on the scenario proposed in [9] could present viable candidates to explain the early universe dynamics and longstanding problems in the fundamental particle physics [85,[103][104][105][106][107][108][109]. Some of these analyses are currently in progress and will be reported in a forthcoming communication.…”

Studies of Wick Cutkosky model in light of its classical ground state using Dyson Schwinger equations

“…There are a number of rationales to assume high prospects of other scalar fields in nature. In recent years, the idea of Higgs providing slow rollover during cosmic inflation [17] caught considerable attention [18][19][20]. However, the quartic Higgs coupling is found to be around 0.6 [19], which is different from the expected value for a successful inflation by orders of magnitudes.…”

“…In recent years, the idea of Higgs providing slow rollover during cosmic inflation [17] caught considerable attention [18][19][20]. However, the quartic Higgs coupling is found to be around 0.6 [19], which is different from the expected value for a successful inflation by orders of magnitudes. It indicates that at least one more scalar should exist in nature to fulfill the role of inflaton.…”

Two Higgs Doublet Model with Scalar Mediation via Yukawa Interactions

“…The standard model (SM) [1,2] has already seen its limitations as it is inadequate for complete understanding of a number of observations and the new physics. Supersymmetry [3,4], cosmic inflation [5][6][7][8][9][10][11][12], dark matter [13][14][15][16][17][18], baryon asymmetry, and naturalness problem are some of these examples. In order to study new physics, various extensions of the SM are studied [19].…”