Ultraviolet sensitivity of the cosmological sequester
arXiv:2007.07058 · doi:10.1103/PhysRevD.103.064018
Abstract
We revisit the "sequester" proposal of Kaloper, Padilla and collaborators, in which the amplitude of the cosmological constant is decoupled from large contributions due to loops containing Standard Model particles. We review the different formulations of the model that have appeared in the literature, and estimate the importance of a particular class of quantum corrections-those that dress the interaction between the "rigid" scalars and infrared properties of the spacetime such as its 4-volume and integrated curvature. In formulations that do not adequately sequester graviton loops we argue that dressing of these interactions causes further failures of complete sequestration. We estimate the size of the effect and find that it is typically smaller than the cosmological term directly induced by loops containing a single virtual graviton. Meanwhile, in the most developed formulation of the scenario (where a rigid scalar couples to the Gauss-Bonnet density), this dressing can be absorbed into a rescaling of the rigid fields and is therefore harmless.
11 pages, 2 figures. v2: Minor changes to notation, accepted in PRD
References in corpus (9)
- Lectures on the Cosmological Constant Problem
- Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences
- Zero-point quantum fluctuations and dark energy
- Anomalous coupling of scalars to gauge fields
- A local self-tuning mechanism for the cosmological constant
- Cosmological consequences of Omnia Sequestra
- Chiral Symmetry and the Cosmological Constant
- A natural theory of dark energy
- Gravitational Quantum Effects and Nonlocal Approach to the Cosmological Constant Problem