The cosmological constant problem and the effective potential of a gravity-coupled scalar

Ferrero R, Percacci R (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Journal of High Energy Physics Springer Verlag (Germany) / Institute of Physics / Scuola Internazionale Superiore di Studi Avanzati (SISSA)

Book Volume: 2024

Article Number: 74

Journal Issue: 9

DOI: 10.1007/JHEP09(2024)074

Abstract

We consider a quantum scalar field in a classical (Euclidean) De Sitter background, whose radius is fixed dynamically by Einstein’s equations. In the case of a free scalar, it has been shown by Becker and Reuter that if one regulates the quantum effective action by putting a cutoff N on the modes of the quantum field, the radius is driven dynamically to infinity when N tends to infinity. We show that this result holds also in the case of a self-interacting scalar, both in the symmetric and broken-symmetry phase. Furthermore, when the gravitational background is put on shell, the quantum corrections to the mass and quartic self-coupling are found to be finite.

Authors with CRIS profile

Renata Ferrero Chair for Theoretical Physics III (Quantum Gravity)

Involved external institutions

Scuola Internazionale Superiore di Studi Avanzati (SISSA) IT Italy (IT)

How to cite

APA:

Ferrero, R., & Percacci, R. (2024). The cosmological constant problem and the effective potential of a gravity-coupled scalar. Journal of High Energy Physics, 2024(9). https://doi.org/10.1007/JHEP09(2024)074

MLA:

Ferrero, Renata, and Roberto Percacci. "The cosmological constant problem and the effective potential of a gravity-coupled scalar." Journal of High Energy Physics 2024.9 (2024).

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