Higgs inflation as a mirage

Barbón, J.L.F.; Casas, J.A.; Elias-Miró, J.; Espinosa, J. R.

doi:10.1007/jhep09(2015)027

Cited by 77 publications

(95 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rather large ratios such as m t =m u ≃ 10 5 seem to be unnatural but they are certainly realized in nature. Moreover, it is possible to construct embeddings of Higgs inflation in which an apparently unnatural nonminimal coupling ξ appears as the low-energy remnant of a "natural" theory containing parameters of order one and different energy scales [21].…”

Section: The General Frameworkmentioning

confidence: 99%

“…During each semioscillation j, the SM fields coupled to it oscillate many times and particle creation takes place. The depletion of the Higgs condensate is dominated by the production of W and Z bosons 20,21 and their subsequent decay into relativistic SM fermions.…”

Section: Preheatingmentioning

confidence: 99%

“…20 The direct production of fermions is suppressed by Pauli blocking effects. 21 The creation of Higgses, although tachyonic in nature, is much less efficient (see Appendix C for details). 22 This temperature is obtained by equating the total energy density of the fermions at a given time, ρ F ðjÞ, to the energy density of a thermal plasma in thermal equilibrium.…”

Section: A Noncritical Higgs Inflationmentioning

confidence: 99%

See 2 more Smart Citations

Living beyond the edge: Higgs inflation and vacuum metastability

2015

View full text Add to dashboard Cite

The measurements of the Higgs mass and top Yukawa coupling indicate that we live in a very special universe, at the edge of the absolute stability of the electroweak vacuum. If fully stable, the Standard Model (SM) can be extended all the way up to the inflationary scale and the Higgs field, nonminimally coupled to gravity with strength ξ, can be responsible for inflation. We show that the successful Higgs inflation scenario can also take place if the SM vacuum is not absolutely stable. This conclusion is based on two effects that were overlooked previously. The first one is associated with the effective renormalization of the SM couplings at the energy scale M P =ξ, where M P is the Planck scale. The second one is a symmetry restoration after inflation due to high temperature effects that leads to the (temporary) disappearance of the vacuum at Planck values of the Higgs field.

show abstract

Section: The General Frameworkmentioning

confidence: 99%

Section: Preheatingmentioning

confidence: 99%

Section: A Noncritical Higgs Inflationmentioning

confidence: 99%

See 1 more Smart Citation

Living beyond the edge: Higgs inflation and vacuum metastability

2015

View full text Add to dashboard Cite

show abstract

“…There has been several proposals to push the cutoff scale of the Higgs inflation model up to the Planck scale [31][32][33]. We focus on the mixed Higgs-R 2 model [34][35][36][37], where the inflation is driven by the Higgs field and the scalaron from the R 2 term [38], which can be also considered as a UV-extension of the Higgs inflation [35,39].…”

Section: Introductionmentioning

confidence: 99%

On the violent preheating in the mixed Higgs-R2 inflationary model

Jinno

Kamada

et al. 2019

Physics Letters B

View full text Add to dashboard Cite

It has been argued that the mixed Higgs-R 2 model acts as the UV extension of the Higgs inflation, pushing up its cut-off scale in the vacuum close up to the Planck scale. In this letter, we study the inflaton oscillation stage after inflation, focusing on the effective mass of the phase direction of the Higgs field, which can cause a violent preheating process. We find that the "spikes" in the effective mass of the phase direction observed in the Higgs inflation still appear in the mixed Higgs-R 2 model. While the spikes appear above the cut-off scale in the Higgs-only case, they appear below the cut-off scale when the model is extended with R 2 term though reheating cannot be completed in the violent particle production regime since the spikes get milder.

show abstract

“…Some time after the proposal, it was also noticed that a large non-minimal coupling necessary for a successful Higgs inflation causes unitarity problem much below the Planck scale [4]. However, Higgs inflation can be saved under the assumption that new physics entering at unitarity scale respects the approximate scale symmetry [5] or due to extra degrees of freedom fully recovering the unitarity up to the Planck scale [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Unitary inflaton as decaying dark matter

Choi

Kang

Lee

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We consider the inflation model of a singlet scalar field (sigma field) with both quadratic and linear non-minimal couplings where unitarity is ensured up to the Planck scale. We assume that a Z 2 symmetry for the sigma field is respected by the scalar potential in Jordan frame but it is broken explicitly by the linear nonminimal coupling due to quantum gravity. We discuss the impacts of the linear non-minimal coupling on various dynamics from inflation to low energy, such as a sizable tensor-to-scalar ratio, a novel reheating process with quartic potential dominance, and suppressed physical parameters in the low energy, etc. In particular, the linear non-minimal coupling leads to the linear couplings of the sigma field to the Standard Model through the trace of the energy-momentum tensor in Einstein frame. Thus, regarding the sigma field as a decaying dark matter, we consider the non-thermal production mechanisms for dark matter from the decays of Higgs and inflaton condensate and show the parameter space that is compatible with the correct relic density and cosmological constraints. †

show abstract

Higgs inflation as a mirage

Cited by 77 publications

References 18 publications

Living beyond the edge: Higgs inflation and vacuum metastability

Living beyond the edge: Higgs inflation and vacuum metastability

On the violent preheating in the mixed Higgs-R2 inflationary model

Unitary inflaton as decaying dark matter

Contact Info

Product

Resources

About