TY - JOUR

T1 - Galilean constant-roll inflation

AU - Herrera, Ramón

AU - Shokri, Mehdi

AU - Sadeghi, Jafar

N1 - Publisher Copyright:
© 2023 Elsevier B.V.

PY - 2023/8

Y1 - 2023/8

N2 - The constant-roll inflation in the context of Galilean inflation or G-inflation is analyzed. By considering some coupling function G(φ,χ) associated with the model of G-inflation, we find different inflationary solutions in the context of the constant roll scenario. In order to present an analytical discussion, we work with two specific cases of the general function G(φ,χ)∝g(φ)χn, e.g. (i) G(φ,χ)∝φ when g(φ)=φ and n=0 and (ii) G(φ,χ)∝χ when g(φ)= constant and n=1/2. Also, we introduce a new function G(φ,χ) associated with both variables φ and χ. We reconstruct the potential of the scalar field for the considered cases of the function G in the context of the constant-roll approach and then we study the corresponding cosmological perturbations of the model. Eventually, we use the recent observations datasets in order to constrain the parameter-space of the model.

AB - The constant-roll inflation in the context of Galilean inflation or G-inflation is analyzed. By considering some coupling function G(φ,χ) associated with the model of G-inflation, we find different inflationary solutions in the context of the constant roll scenario. In order to present an analytical discussion, we work with two specific cases of the general function G(φ,χ)∝g(φ)χn, e.g. (i) G(φ,χ)∝φ when g(φ)=φ and n=0 and (ii) G(φ,χ)∝χ when g(φ)= constant and n=1/2. Also, we introduce a new function G(φ,χ) associated with both variables φ and χ. We reconstruct the potential of the scalar field for the considered cases of the function G in the context of the constant-roll approach and then we study the corresponding cosmological perturbations of the model. Eventually, we use the recent observations datasets in order to constrain the parameter-space of the model.

KW - CMB anisotropies observations

KW - Constant-roll approach

KW - Galilean inflation

UR - http://www.scopus.com/inward/record.url?scp=85153795060&partnerID=8YFLogxK

U2 - 10.1016/j.dark.2023.101232

DO - 10.1016/j.dark.2023.101232

M3 - Article

AN - SCOPUS:85153795060

SN - 2212-6864

VL - 41

JO - Physics of the Dark Universe

JF - Physics of the Dark Universe

M1 - 101232

ER -