Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5006
Title: Stress-energy connection and cosmological constant problem
Authors: Demir, Durmuş Ali
Keywords: Cosmological constant
Gravitational constant
Stress-energy connection
Issue Date: Jul-2011
Publisher: Elsevier Ltd.
Source: Demir, D. A. (2011). Stress-energy connection and cosmological constant problem. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 701(4), 496-502. doi:10.1016/j.physletb.2011.06.018
Abstract: We study gravitational properties of vacuum energy by erecting a geometry on the stress-energy tensor of vacuum, matter and radiation. Postulating that the gravitational effects of matter and radiation can be formulated by an appropriate modification of the spacetime connection, we obtain varied geometrodynamical equations which properly comprise the usual gravitational field equations with, however, Planck-suppressed, non-local, higher-dimensional additional terms. The prime novelty brought about by the formalism is that, the vacuum energy does act not as the cosmological constant but as the source of the gravitational constant. The formalism thus deafens the cosmological constant problem by channeling vacuum energy to gravitational constant. Nevertheless, quantum gravitational effects, if any, restore the problem via the graviton and graviton-matter loops, and the mechanism proposed here falls short of taming such contributions to cosmological constant.
URI: http://doi.org/10.1016/j.physletb.2011.06.018
http://hdl.handle.net/11147/5006
ISSN: 0370-2693
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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