Boson mixing and flavor vacuum in the expanding Universe: a possible candidate for the dark energy
arXiv:2301.13678 · doi:10.1016/j.physletb.2023.137889
Abstract
We analyze the boson mixing in curved spacetime and compute the expectation value of the energy-momentum tensor of bosons on the flavor vacuum in spatially flat Friedmann-Lemaitre-Robertson-Walker metrics. We show that the energy-momentum tensor of the flavor vacuum behaves as the effective energy-momentum tensor of a perfect fluid. Assuming a fixed de Sitter background, we show that the equation of state can assume values in the interval [-1, 1], and, in the flat spacetime limit has a value -1, which is the one of the dark energy. The results here presented show that vacuum of mixed bosons like neutrino super-partners, can represent a possible component of the dark energy of the Universe.
19 pages, 2 figures
References in corpus (12)
- Dynamics of dark energy
- Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
- Dark Energy and the Accelerating Universe
- Approaches to Understanding Cosmic Acceleration
- Dark Energy and Dark Gravity
- Lemaitre-Tolman-Bondi model and accelerating expansion
- The cosmological constant from the ghost. A toy model
- Gluonic vacuum, q-theory, and the cosmological constant
- Neutrino mixing as a source of dark energy
- Dark energy and particle mixing
- Cosmological constant from quarks and torsion
- Axion-photon mixing in quantum field theory and vacuum energy