منابع مشابه
Massive graviton as a testable cold-dark-matter candidate.
We construct a consistent model of gravity where the tensor graviton mode is massive, while linearized equations for scalar and vector metric perturbations are not modified. The Friedmann equation acquires an extra dark-energy component leading to accelerated expansion. The mass of the graviton can be as large as approximately (10(15) cm)(-1), being constrained by the pulsar timing measurements...
متن کاملRepresenting the massive graviton in the metric tensor gu, v
1,0 h representing (1+1) geometry, and ~ 1/50,000 in magnitude to 3,0 h of (3+1) geometry. The non vanishing of the 1,0 h term representing (1+1) geometry contravenes predictions of no relic gravitational waves and makes predictions if the prior universe was a single event a la Steinhardt or a multiverse in the form suggested by Tegmark. I.e. change in the application of 0 φ ≅ && of inflation. ...
متن کاملMassless and massive graviton spectra in anisotropic dilatonic braneworld cosmologies
We consider a braneworld model in which an anisotropic brane is embedded in a dilatonic background. We solve the background solutions and study the behavior of the perturbations when the universe evolves from an inflationary Kasner phase to a Minkowski phase. We calculate the massless mode spectrum, and find that it does not differ from what expected in standard four-dimensional cosmological mo...
متن کاملOn The Size of a Graviton
We propose an approximate wavefunction of the bound state of N D0-branes. Its spread grows as N Definition of M-theory [1][2] using its ten dimensional compactification requires the knowledge of the behaviour of the Kaluza-Klein modes of the graviton. These are realized as the bound states [3] of D0-branes of Type IIA string theory, originally discovered as the black holes in the supergravity [...
متن کاملNormalization of the chiral condensate in the massive Schwinger model
Within mass perturbation theory, already the first order contribution to the chiral condensate of the massive Schwinger model is UV divergent. We discuss the problem of choosing a proper normalization and, by making use of some bosonization results, we are able to choose a normalization so that the resulting chiral condensate may be compared, e.g., with lattice data. ∗)email address: adam@maths...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2014
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2014.09.065