Perturbations in massive gravity cosmology
نویسندگان
چکیده
منابع مشابه
Inflaton perturbations in brane-world cosmology with induced gravity
We study cosmological perturbations in the brane models with an induced Einstein-Hilbert term on a brane. We consider an inflaton confined to a de Sitter brane in a five-dimensional Minkowski spacetime. Inflaton fluctuations excite Kaluza-Klein modes of bulk metric perturbations with mass m = −2(2l− 1)(l+ 1)H and m = −2l(2l+ 3)H where l is an integer. There are two branches (± branches) of solu...
متن کاملMassive Neutrinos in Cosmology
There are two places in cosmology where the mass of neutrinos would play a significant role. One is leptogenesis in the early universe, and the other is the evolution of mass density fluctuations that are explored with cosmic microwave background (CMB) fluctuations and the formation of cosmic structure. There is one more place where the presence of neutrinos is generally important — primordial ...
متن کاملSpherically Symmetric Solutions in a New Braneworld Massive Gravity Theory
In this paper, a combination of the braneworld scenario and covariant de Rham-Gabadadze-Tolley (dRGT) massive Gravity theory is proposed. In this setup, the five-dimensional bulk graviton is considered to be massive. The five dimensional nonlinear ghost-free massive gravity theory affects the 3-brane dynamics and the gravitational potential on the brane. Following the solutions with spherical s...
متن کاملConstraints on Scalar-Tensor Theories of Gravity from Density Perturbations in Inflationary Cosmology
Spectra of density perturbations produced during chaotic inflation in scalartensor theories of gravity are calculated, taking both adiabatic and isocurvature modes into account. Comparing the predicted spectrum of the cosmic microwave background radiation anisotropies with the one observed by the COBE-DMR we calculate constraints on the parameters of these theories, which turn out to be stronge...
متن کاملConstraints on Scalar-tensor Theories of Gravity from Density Perturbations in Innationary Cosmology
Spectra of density perturbations produced during chaotic innation in scalar-tensor theories of gravity are calculated, taking both adiabatic and isocurva-ture modes into account. Comparing the predicted spectrum of the cosmic microwave background radiation anisotropies with the one observed by the COBE-DMR we calculate constraints on the parameters of these theories, which turn out to be strong...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2012
ISSN: 1029-8479
DOI: 10.1007/jhep06(2012)085