Dark energy from conformal symmetry breaking
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The breakdown of conformal symmetry in a conformally invariant scalar-tensor gravitational model is revisited in the cosmological context. Although the old scenario of conformal symmetry breaking in cosmology containing a scalar field has already been used in many earlier works, it seems that no special attention has been paid for the investigation on the possible connection between the breakdown of conformal symmetry and the existence of dark energy. In this paper, it is shown that the old scenario of conformal symmetry breaking in cosmology, if properly interpreted, not only has a potential ability to describe the origin of dark energy as a symmetry breaking effect, but also may resolve the coincidence problem.
KeywordsDark Energy Mass Term Conformal Symmetry Gravitational Coupling Conformal Anomaly
The author would like to thank the anonymous referee for the enlightening comments. This work has been supported by a grant/research fund number 217/D/5947 from Azarbaijan Shahid Madani University.
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