Cosmological constant, renormalization group and Planck scale physics

Details Cosmological constant, renormalization group and Planck scale physics Cosmological constant, renormalization group and Planck scale physics

2003-05-25

arxiv.org/abs/hep-ph/0305279v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 6 pages, no figures. Talk presented at IRGA 2003: Renormalization Group and Anomalies in Gravitation and Cosmology, Our

Scientific paper

10.1016/S0920-5632(03)02402-2

Starting from generic quantum effects at the Planck scale M_P, we find that the renormalization group running of the cosmological constant (CC) at low energies is possible if there is a smooth decoupling of all massive particles from M_P to the mass of the lightest neutrino. We discuss the theoretical implications of this running for the ``old'' and ``new'' cosmological constant problems. Interestingly enough, the CC running implies a strong relationship between quantum field theory and cosmology, which should be observable in the near future in experiments such as SNAP through the measurement of a cubic redshift dependence of the CC.

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