Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Pimentel, Luís"'
Autor:
Pineda, Flavio, Pimentel, Luis O.
We investigate the non-perturbative production of scalar particles within the Higgs-$R^2$ inflation model, focusing on a massive spectator field that interacts gravitationally via a non-minimal coupling to the Ricci scalar $R$. By transforming the mo
Externí odkaz:
http://arxiv.org/abs/2409.09999
Autor:
Coronado Reyes, Oscar Ivan, Téllez Anguiano, Adriana del Carmen, Gutiérrez Gnecchi, José Antonio, Castro Pimentel, Luis Alfredo, García Rodríguez, Eilen
Publikováno v:
In Biosensors and Bioelectronics: X June 2024 18
Autor:
Pimentel, Luis O., Pineda, Flavio
In this work we consider particle creation by the expansion of the universe, using two Bianchi type I anisotropic models. The particles studied are of spin 0 and 1/2. The cosmological models have rotational symmetry, which allows us to solve exactly
Externí odkaz:
http://arxiv.org/abs/2103.06423
In this work we construct an effective four-dimensional model by compactifying a ten-dimensional theory of gravity coupled with a real scalar dilaton field on a time-dependent torus. The corresponding action in four dimensions is similar to the actio
Externí odkaz:
http://arxiv.org/abs/1804.00513
We use a simple form of the K-essence theory and apply it to the classic isotropic cosmological model and seek exact solutions. The particular form of the kinetic term that we choose is $K \left(\phi, X \right)= K_0(\phi)X^m +K_1$. The resulting fiel
Externí odkaz:
http://arxiv.org/abs/1610.01235
Autor:
Holanda, Marcelo T., Mediano, Mauro F.F., Hasslocher-Moreno, Alejandro M., Gonzaga, Beatriz M.S., Carvalho, Anna Cristina C., Ferreira, Roberto R., Garzoni, Luciana R., Pereira-Silva, Fernanda S., Pimentel, Luis O., Mendes, Marcelo O., Azevedo, Marcos J., Britto, Constança, Moreira, Otacilio C., Fernandes, Alice G., Santos, Carolina M., Constermani, Jéssica, Paravidino, Vitor B., Maciel, Erica R., Carneiro, Fernanda M., Xavier, Sérgio S., Sperandio da Silva, Gilberto M., Santos, Priscila F., Veloso, Henrique H., Brasil, Pedro E.A.A., de Sousa, Andrea S., Bonecini-de-Almeida, Maria G., da Silva, Paula S., Sangenis, Luiz Henrique C., Saraiva, Roberto M., Araujo-Jorge, Tania C.
Publikováno v:
In EClinicalMedicine October 2021 40
Publikováno v:
Astrophysics and Space Sci. {\bf 360:20} (2015)
We present the case of time-varying cosmological term $\Lambda(t)$. The main idea arises by proposing that as in the cosmological constant case, the scalar potential is identified as $ V(\phi)=2\Lambda$, with $\Lambda$ a constant, this identification
Externí odkaz:
http://arxiv.org/abs/1510.07953
We use one of the simplest forms of the K-essence theory and we apply it to the classical anisotropic Bianchi type I cosmological model, with a barotropic perfect fluid modeling the usual matter content and with cosmological constant. The classical s
Externí odkaz:
http://arxiv.org/abs/1409.3163