Preheating and reheating constraints in supersymmetric braneworld inflation

Bourakadi, K. El; Bousder, M.; Sakhi, Z.; Беннаи, М.

doi:10.1140/epjp/s13360-021-01887-x

Cited by 15 publications

(14 citation statements)

References 39 publications

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“…The T re converges around 10 15 GeV, which may be required by the GUT-scale regeneration model [71]. The point where the four lines come together (N re = 0) is what be called the instantaneous reheating point [44].…”

Section: Reheating Constraintsmentioning

confidence: 97%

Reheating constraints on modified single-field natural inflation models

et al. 2022

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In this paper, we discuss three modified single-field natural inflation models in detail, including Special generalized natural inflation model (SNI), extended natural inflation model (ENI) and natural inflation inspired model (NII). We derive the analytical expression of the tensor-to-scalar ratio r and the spectral index $$n_s$$ n s for those models. Then the reheating temperature $$T_{re}$$ T re and reheating duration $$N_{re}$$ N re are analytically derived. Moreover, considering the CMB constraints, the feasible space of the SNI model in $$(n_s, r)$$ ( n s , r ) plane is almost covered by that of the NII, which means the NII is more general than the SNI. In addition, there is no overlapping space between the ENI and the other two models in $$(n_s, r)$$ ( n s , r ) plane, which indicates that the ENI and the other two models exclude each other, and more accurate experiments can verify them. Furthermore, the reheating brings tighter constraints to the inflation models, but they still work for a different reheating universe. Considering the constraints of $$n_s$$ n s , r, $$N_k$$ N k and choosing $$T_{re}$$ T re near the electroweak energy scale, one can find that the decay constants of the three models have no overlapping area and the effective equations of state $$\omega _{re}$$ ω re should be within $$\frac{1}{4}\lesssim \omega _{re} \lesssim \frac{4}{5}$$ 1 4 ≲ ω re ≲ 4 5 for the three models.

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Section: Reheating Constraintsmentioning

confidence: 97%

Reheating constraints on modified single-field natural inflation models

et al. 2022

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“…According to the constraints of CMB on the model parameter space, we choose four typical values of f m for subsequent discussion, i.e., f m = 8M p , f m = 10M p , f m = 20M p and f m = 30M p . The T re converges around 10 15 GeV, which may be required by the GUT-scale regeneration model [71]. The point where the four lines come together (N re = 0) is what be called the instantaneous reheating point [44].…”

Section: B Reheating Constraintsmentioning

confidence: 97%

Reheating constraints on modified single-field Natural Inflation models

Zhou,

Yu,

Pan

et al. 2022

Preprint

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In this paper, we discuss three modified single-field natural inflation models in detail, including Special generalized Natural Inflation model(SNI), Extended Natural Inflation model(ENI) and Natural Inflation inspired model(NII). We derive the analytical expression of the tensor-to-scalar ratio r and the spectral index ns for those models. Then the reheating temperature Tre and reheating duration Nre are analytically derived. Moreover, considering the CMB constraints, the feasible space of the SNI model in (ns, r) plane is almost covered by that of the NII, which means the NII is more general than the SNI. In addition, there is no overlapping space between the ENI and the other two models in (ns, r) plane, which indicates that the ENI and the other two models exclude each other, and more accurate experiments can verify them. Furthermore, the reheating brings tighter constraints to the inflation models, but they still work for a different reheating universe. Considering the constraints of ns, r, N k and choosing Tre near the electroweak energy scale, one can find that the decay constants of the three models have no overlapping area and the effective equations of state ωre should be within 1 4 ωre 4 5 for the three models.

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“…In our model reheating must occur considering the condition φ φ c , that makes our model described a chaotic shape of potential V ∼ m 2 φ 2 /2. We can extract information about reheating in terms of the e-folds numbers N re and the reheating temperature T re considering the time observed CMB modes crossed beyond the Hubble radius till the present time [22,28]…”

Section: Reheating Constraints From Early Evolutionmentioning

confidence: 99%

“…At the end of hybrid inflation, the behavior of the fields could describe the explosive preheating with a production of φ and σ particles [12]. While in [28] the behavior of particle production was studied considering an extra field χ coupled to both φ and σ fields. Particle production in χ field that interacts with the fields φ and σ require amplified fluctuations which allows an explosive production of χ-particles, this means we are in the broad parametric resonance region, the expansion of the universe plays an important role in ending the parametric resonance regime, particle production will be ended by the redshifted modes that will fall out of the resonance band because of the expansion.…”

Section: Reheating Constraints From Early Evolutionmentioning

confidence: 99%

Hubble tension and Reheating: Hybrid Inflation Implications

Bourakadi¹

2022

Preprint

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We investigate a new possible solution to the Hubble constant tension. we propose a simple resolution to the problem assuming that a first-order phase transition related to H0 transition occurred in the early Universe. The early evolution of the Universe is a result of hybrid inflation that has lasted for a specific period until symmetry breaking takes place. Fitting our model to measurements from P lanck and SH0ES data provides a key explanation of discrepancies of H0 measurements. The quantum fluctuations calculated in this model have significant results on the reheating parameters Nre and Tre. Therefore, new constraints must be taken into consideration to fit these parameters to recent results.I.

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Preheating and reheating constraints in supersymmetric braneworld inflation

Cited by 15 publications

References 39 publications

Reheating constraints on modified single-field natural inflation models

Reheating constraints on modified single-field natural inflation models

Reheating constraints on modified single-field Natural Inflation models

Hubble tension and Reheating: Hybrid Inflation Implications

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