Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/20739
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Model independent constraints on mass-varying neutrino scenarios |
Autor: | Pastor, Sergio CSIC ORCID; Franca, Urbano CSIC ORCID; Lattanzi, Massimiliano; Lesgourgues, J. | Fecha de publicación: | 7-oct-2009 | Editor: | American Physical Society | Citación: | Physical Review - Section D - Particles and Fields 80 (8): 083506 (2009) | Resumen: | Models of dark energy in which neutrinos interact with the scalar field supposed to be responsible for the acceleration of the Universe usually imply a variation of the neutrino masses on cosmological time scales. In this work we propose a parametrization for the neutrino mass variation that captures the essentials of those scenarios and allows one to constrain them in a model independent way, that is, without resorting to any particular scalar field model. Using WMAP 5 yr data combined with the matter power spectrum of SDSS and 2dFGRS, the limit on the present value of the neutrino mass is m(0) equivalent to m(nu)(z = 0) < 0.43 (0.28) eV at 95% C.L. for the case in which the neutrino mass was lighter ( heavier) in the past, a result competitive with the ones imposed for standard (i.e., constant mass) neutrinos. Moreover, for the ratio of the mass variation of the neutrino mass Delta m(nu) over the current mass m(0) we found that log[vertical bar Delta m(nu)vertical bar/m(0)] < -1.3 (-2.7) at 95% C.L. for Delta m(nu) < 0 (Delta m(nu) > 0), totally consistent with no mass variation. These stringent bounds on the mass variation are not related to the neutrino freestreaming history which may affect the matter power spectrum on small scales. On the contrary, they are imposed by the fact that any significant transfer of energy between the neutrino and dark energy components would lead to an instability contradicting CMB and large-scale structure data on the largest observable scales. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.80.083506 | URI: | http://hdl.handle.net/10261/20739 | DOI: | 10.1103/PhysRevD.80.083506 | ISSN: | 1550-7998 |
Aparece en las colecciones: | (IFIC) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
model independent.pdf | 404,75 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
18
checked on 13-abr-2024
WEB OF SCIENCETM
Citations
17
checked on 28-feb-2024
Page view(s)
362
checked on 22-abr-2024
Download(s)
216
checked on 22-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.