منابع مشابه
Problems and hopes in nonsymmetric gravity ‡
We consider the linearized nonsymmetric theory of gravitation (NGT) within the background of an expanding universe and near a Schwarzschild mass. We show that the theory always develops instabilities unless the linearized nonsymmetric lagrangian reduces to a particular simple form. This form contains a gauge invariant kinetic term, a mass term for the antisymmetric metric-field and a coupling w...
متن کاملNonsymmetric Gravity and Noncommutative Signals *
Models in which the space-time metric g µν is not symmetric, i.e. g µν = g νµ may make predictions in scattering experiments, for example in a future e + e − linear collider, similar to those from noncommutative field theory. We compute the differential cross sections for pair annihilation , Bhabha and Møller scattering and find that both nonsymmetric gravity theory(NGT) and noncommutative fiel...
متن کاملNonsymmetric gravity theories: Inconsistencies and a cure.
Motivated by the apparent dependence of string cr models on the sum of spacetime metric and antisymmetric tensor fields, we reconsider gravity theories constructed from a nonsymmetric metric. We first show, by expanding in powers of the antisymmetric field, that all such "geometrical" theories homogeneous in second derivatives violate standard physical requirements: ghost freedom, absence of al...
متن کاملNonsymmetric Gravity Does Have Acceptable Global Asymptotics
We consider the claim by Damour, Deser and McCarthy [3] that nonsymmetric gravity theory has unacceptable global asymptotics. We explain why this claim is incorrect.
متن کاملExact Solutions in Gravity, and Symmetric and Nonsymmetric Metrics
We provide a proof that nonholonomically constrained Ricci flows of (pseudo) Riemannian metrics positively result into nonsymmetric metrics (as explicit examples, we consider flows of some physically valuable exact solutions in general relativity). There are constructed and analyzed three classes of solutions of Ricci flow evolution equations defining nonholonomic deformations of Taub NUT, Schw...
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ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2007
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8113/40/25/s63