Title : ( A landscape for the cosmological constant and the Higgs mass )
Authors: Parsa Ghorbani , Alessandro Strumia , Daniele Teresi ,Abstract
The cosmological constant and the Higgs mass seem unnaturally small and anthropically selected. We show that both can be efficiently scanned in Quantum Field Theories with a large enough number of vacua controllable thanks to approximated Z2 symmetries (even for Coleman-Weinberg potentials). We find that vacuum decay in a landscape implies weaker bounds than previously estimated. Special vacua where one light scalar is accidentally light avoid catastrophic vacuum decay if its self-cubic is absent. This is what happens for the Higgs doublet, thanks to gauge invariance. Yukawa couplings can be efficiently scanned, as suggested by anthropic boundaries on light quark masses. Finally, we suggest that the lack of predictivity of landscapes can be mitigated if their probability distributions are non-Gaussian (possibly even fractal).
Keywords
, Beyond Standard Model, Cosmology of Theories beyond the SM, Effective Field Theories@article{paperid:1091011,
author = {Parsa Ghorbani, and Alessandro Strumia and Daniele Teresi},
title = {A landscape for the cosmological constant and the Higgs mass},
journal = {Journal of High Energy Physics},
year = {2020},
volume = {2020},
number = {1},
month = {January},
issn = {1029-8479},
keywords = {Beyond Standard Model; Cosmology of Theories beyond the SM; Effective
Field Theories},
}
%0 Journal Article
%T A landscape for the cosmological constant and the Higgs mass
%A Parsa Ghorbani,
%A Alessandro Strumia
%A Daniele Teresi
%J Journal of High Energy Physics
%@ 1029-8479
%D 2020