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Conformal transformations in metric-affine gravity and ghosts
(Wiley-VCH Verlag, 2012-08)
Conformal transformations play a widespread role in gravity theories in regard to their cosmological and other implications. In the pure metric theory of gravity, conformal transformations change the frame to a new one ...
Higgsed Stueckelberg vector and Higgs quadratic divergence
Here we show that, a hidden vector field whose gauge invariance is ensured by a Stueckelberg scalar and whose mass is spontaneously generated by the Standard Model Higgs field contributes to quadratic divergences in the ...
Relativistic MOND from modified energetics
We begin to investigate the question of what modifications in the energy-momentum tensor can yield the correct MOND regime. As a starting study, we refrain from insisting on an action principle and focus exclusively on the ...
Scalars, vectors and tensors from metric-affine gravity
The metric-affine gravity provides a useful framework for analyzing gravitational dynamics since it treats metric tensor and affine connection as fundamentally independent variables. In this work, we show that, a metric-affine ...