Some remarks on the attractor behaviour in ELKO cosmology


Autoria(s): Pereira, S. H.; Pinho, A. S. S.; Hoff da Silva, J. M.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

18/03/2015

18/03/2015

01/08/2014

Resumo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit isolated stable points that could alleviate the cosmic coincidence problem. When a constant parameter delta related to the potential of the ELKO field is introduced in the system however, stable fixed points are found for some specific types of interaction between the ELKO field and matter. Although the parameter delta is related to an unknown potential, in order to satisfy the stability conditions and also that the fixed points are real, the range of the constant parameter delta can be constrained for the present time and the coincidence problem can be alleviated for some specific interactions. Such restriction on the ELKO potential opens possibility to apply the ELKO field as a candidate to dark energy in the universe, and so explain the present phase of acceleration of the universe through the decay of the ELKO field into matter.

Formato

15

Identificador

http://dx.doi.org/10.1088/1475-7516/2014/08/020

Journal Of Cosmology And Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 8, 15 p., 2014.

1475-7516

http://hdl.handle.net/11449/116979

10.1088/1475-7516/2014/08/020

WOS:000341848800020

Idioma(s)

eng

Publicador

Iop Publishing Ltd

Relação

Journal Of Cosmology And Astroparticle Physics

Direitos

closedAccess

Palavras-Chave #dark matter theory #cosmology of theories beyond the SM #dark energy theory
Tipo

info:eu-repo/semantics/article