Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Santos, A. B. M."'
Autor:
de Souza, Rayff, Rodrigues, Jamerson G., Siqueira, Clarissa, Santos, Felipe B. M. dos, Alcaniz, Jailson
A compelling way to address the inflationary period is via the warm inflation scenario, where the interaction of the inflaton field with other degrees of freedom affects its dynamics in such a way that slow-roll inflation is maintained by dissipative
Externí odkaz:
http://arxiv.org/abs/2412.06778
We report forecasted constraints on warm inflation in the light of future cosmic microwave background (CMB) surveys, with data expected to be available in the coming decade. These observations could finally give us the missing information necessary t
Externí odkaz:
http://arxiv.org/abs/2412.02696
We revisit the small field double-well inflationary model and investigate its observational viability in light of the current Cosmic Microwave Background data. In particular, considering scenarios with minimal and nonminimal coupling between the infl
Externí odkaz:
http://arxiv.org/abs/2409.13918
In the warm inflation scenario, the early cosmic acceleration is driven by the inflaton coupled to thermal fields, decaying into radiation and leaving a hot universe populated by relativistic particles after the end of inflation. The interaction is u
Externí odkaz:
http://arxiv.org/abs/2407.18891
Natural inflation is a well-motivated model for the early universe in which an inflaton potential of the pseudo-Nambu-Goldstone form, $V(\phi) = \Lambda^4[1 + \cos{(\phi/f)}]$, can naturally drive a cosmic accelerated epoch. This paper investigates t
Externí odkaz:
http://arxiv.org/abs/2312.12286
We investigate the impact of a non-minimal coupling of the scalar field with gravity in inflationary models, where a small coupling is allowed. As a concrete example, we consider the Witten-O'Raifeartaigh model, where, in line with other models, the
Externí odkaz:
http://arxiv.org/abs/2306.07260
Autor:
Santos, F. B. M. dos
Publikováno v:
JCAP 06 (2023) 039
We establish constraints on $f(T)$ gravity by considering the possibility of a scenario that supports a phantom crossing of the equation of state parameter $\omega_{DE}$. After determining the viable parameter space of the model, while checking the i
Externí odkaz:
http://arxiv.org/abs/2211.16370
We investigate theoretical and observational aspects of a warm inflation scenario driven by the $\beta$-exponential potential, which generalizes the well-known power law inflation. In such a scenario, the decay of the inflaton field into radiation ha
Externí odkaz:
http://arxiv.org/abs/2209.06153
Autor:
Santos, F. B. M. dos, Silva, R.
In this work, we revisit the Witten-O'Raifeartaigh model of inflation, in which the potential takes a $\operatorname{log}^2(\phi/M)$ form, when the scalar field is non-minimally coupled to gravity. We investigate the impact of the coupling in the pre
Externí odkaz:
http://arxiv.org/abs/2204.13694
We establish new constraints on $f(T)$ gravity models by using cosmological data. In particular, we investigate the restrictions given by the gas mass fraction measurements of galaxy clusters and transversal BAO data. Both data sets are regarded as w
Externí odkaz:
http://arxiv.org/abs/2112.15249