An étude on global vacuum energy sequester

D’Amico, Guido and Kaloper, Nemanja and Padilla, Antonio and Stefanyszyn, David and Westphal, Alexander and Zahariade, George (2017) An étude on global vacuum energy sequester. Journal of High Energy Physics, 2017 (9). 74/1-74/18. ISSN 1029-8479

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Abstract

Recently two of the authors proposed a mechanism of vacuum energy sequester as a means of protecting the observable cosmological constant from quantum radiative corrections. The original proposal was based on using global Lagrange multipliers, but later a local formulation was provided. Subsequently other interesting claims of a different non-local approach to the cosmological constant problem were made, based again on global Lagrange multipliers. We examine some of these proposals and find their mutual relationship. We explain that the proposals which do not treat the cosmological constant counterterm as a dynamical variable require fine tunings to have acceptable solutions. Furthermore, the counterterm often needs to be retuned at every order in the loop expansion to cancel the radiative corrections to the cosmological constant, just like in standard GR. These observations are an important reminder of just how the proposal of vacuum energy sequester avoids such problems.

Item Type: Article
Keywords: Classical theories of gravity, Effective field theories
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1007/JHEP09(2017)074
Depositing User: Eprints, Support
Date Deposited: 06 Oct 2017 13:24
Last Modified: 14 Oct 2017 08:43
URI: http://eprints.nottingham.ac.uk/id/eprint/47052

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