Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Gomez, L. Gabriel"'
Publikováno v:
Ann. Phys. (Berlin) 534, 2100453 (2022)
The generalized SU(2) Proca theory (GSU2P) is a variant of the well known generalized Proca theory where the vector field belongs to the Lie algebra of the SU(2) group of global transformations under which the action is made invariant. New interestin
Externí odkaz:
http://arxiv.org/abs/2109.10154
Publikováno v:
Int. J. Mod. Phys. D 31, 2250060 (2022)
In the context of scalar-tensor theories, the inclusion of new degrees of freedom coupled non-minimally to the gravitational sector might produce some appealing effects on the cosmic expansion history. We investigate this premise by including a canon
Externí odkaz:
http://arxiv.org/abs/2103.11826
Publikováno v:
Phys. Rev. D 102, 104066 (2020)
As a modified gravity theory that introduces new gravitational degrees of freedom, the generalized SU(2) Proca theory (GSU2P for short) is the non-Abelian version of the well-known generalized Proca theory where the action is invariant under global t
Externí odkaz:
http://arxiv.org/abs/2009.03241
Autor:
Gomez, L. Gabriel, Rodriguez, Yeinzon
Publikováno v:
Phys. Dark Univ. 31 (2021) 100759
We study a new class of vector dark energy models where multi-Proca fields $A_\mu^a$ are coupled to cold dark matter by the term $f(X)\tilde{\mathcal{L}}_{m}$ where $f(X)$ is a general function of $X\equiv -\frac{1}{2}A^\mu_ a A^a_\mu$ and $\tilde{\m
Externí odkaz:
http://arxiv.org/abs/2004.06466
Autor:
Gomez, L. Gabriel, Rodriguez, Yeinzon
Publikováno v:
Phys. Rev. D 100, 084048 (2019)
Under the same spirit of the Galileon-Horndeski theories and their more modern extensions, the generalized SU(2) Proca theory was built by demanding that its action may be free of the Ostrogradski's instability. Nevertheless, the theory must also be
Externí odkaz:
http://arxiv.org/abs/1907.07961
Autor:
Gómez, L. Gabriel
Publikováno v:
Volume 26, Pages 100343, Physics of the Dark Universe (2019)
A binary system embedded in a Dark Matter (DM) background may experience a change in its orbital period due to dynamical friction as the binary moves through a wind of DM particles. We compute such a perturbative effect on the binary evolution consid
Externí odkaz:
http://arxiv.org/abs/1906.10316
Autor:
Gómez, L. Gabriel, Rueda, J. A.
Publikováno v:
Phys. Rev. D 96, 063001 (2017)
The measured orbital period decay of compact-star binaries, with characteristic orbital periods $\sim 0.1$~days, is explained with very high precision by the gravitational wave (GW) emission of an inspiraling binary in vacuum. However, the binary gra
Externí odkaz:
http://arxiv.org/abs/1706.06801
Publikováno v:
Phys. Rev. D 94, 123004 (2016)
It has been shown that a self-gravitating system of massive keV fermions in thermodynamic equilibrium correctly describes the dark matter (DM) distribution in galactic halos and predicts a denser quantum core towards the center of the configuration.
Externí odkaz:
http://arxiv.org/abs/1610.03442
Autor:
Gómez, L. Gabriel, Rodríguez, Yeinzon
Publikováno v:
In Physics of the Dark Universe January 2021 31
We will expose in this paper our advances towards a proof of the equivalence between FRW background expansion, during some period of time that contains primordial inflation, and the statistical isotropy of the primordial curvature perturbation $\zeta
Externí odkaz:
http://arxiv.org/abs/1502.07292