https://doi.org/10.1140/epjc/s10052-023-11813-3
Regular Article - Theoretical Physics
How robust are particle physics predictions in asymptotic safety?
National Centre for Nuclear Research, Pasteura 7, 02-093, Warsaw, Poland
Received:
4
May
2023
Accepted:
9
July
2023
Published online:
21
July
2023
The framework of trans-Planckian asymptotic safety has been shown to generate phenomenological predictions in the Standard Model and in some of its simple new physics extensions. A heuristic approach is often adopted, which bypasses the functional renormalization group by relying on a parametric description of quantum gravity with universal coefficients that are eventually obtained from low-energy observations. Within this approach a few simplifying approximations are typically introduced, including the computation of matter renormalization group equations at 1 loop, an arbitrary definition of the position of the Planck scale at 
and an instantaneous decoupling of gravitational interactions below the Planck scale. In this work we systematically investigate, both analytically and numerically, the impact of dropping each of those approximations on the predictions for certain particle physics scenarios. In particular we study two extensions of the Standard Model, the gauged 
model and the leptoquark 
model, for which we determine a set of irrelevant gauge and Yukawa couplings. In each model, we present numerical and analytical estimates of the uncertainties associated with the predictions from asymptotic safety.
© The Author(s) 2023
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