منابع مشابه
Mathematical problems in higher order gravity and cosmology
We discuss the issue of motivating the analysis of higher order gravity theories and their cosmologies and introduce a rule which states that these theories may be considered as a vehicle for testing whether certain properties may be of relevance to quantum theory. We discuss the physicality issue arising as a consequence of the conformal transformation theorem, the question of formulating a co...
متن کاملProbing large distance higher dimensional gravity from lensing data
The modifications induced in the standard weak-lensing formula if Newtonian gravity differs from inverse square law at large distances are studied. The possibility of putting bounds on the mass of gravitons from lensing data is explored. A bound on graviton mass, esitmated to be about 100 Mpc is obtained from analysis of some recent data on gravitational lensing. Ever since the successful unifi...
متن کاملGravity of higher-dimensional global defects
Solutions of Einstein’s equations are found for global defects in a higherdimensional spacetime with a nonzero cosmological constant Λ. The defect has a (p − 1)-dimensional core (brane) and a ‘hedgehog’ scalar field configuration in the n extra dimensions. For Λ = 0 and n > 2, the solutions are characterized by a flat brane worldsheet and a solid angle deficit in the extra dimensions. For Λ > 0...
متن کاملGravity of superheavy higher-dimensional global defects
Numerical solutions of Einstein’s and scalar-field equations are found for a global defect in a higher-dimensional spacetime. The defect has a (3 + 1)dimensional core and a “hedgehog” scalar-field configuration in n = 3 extra dimensions. For sufficiently low symmetry-breaking scales η, the solutions are characterized by a flat worldsheet geometry and a constant solid deficit angle in the extra ...
متن کاملSolar System Tests of Higher-Dimensional Gravity
The classical tests of general relativity — light deflection, time delay and perihelion shift — are applied, along with the geodetic precession test, to the five-dimensional extension of the theory known as Kaluza-Klein gravity, using an analogue of the four-dimensional Schwarzschild metric. The perihelion advance and geodetic precession calculations are generalized for the first time to situat...
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: Physics Letters B
سال: 1983
ISSN: 0370-2693
DOI: 10.1016/0370-2693(83)90125-9