English

Softly broken conformal symmetry and the stability of the electroweak scale

High Energy Physics - Phenomenology 2015-01-14 v2

Abstract

We point out a novel possible mechanism by which the electroweak hierarchy problem can be avoided in the (effective) quantum field theory. Assuming the existence of a UV complete underlying fundamental theory and treating the cutoff scale Λ\Lambda of the effective field theory as a real physical scale we argue that the hierarchy problem would be solved if the coefficient in front of quadratic divergences vanished for some choice of Λ\Lambda, and if the effective theory mass parameters fixed at Λ\Lambda by the fundamental theory were hierarchically smaller than Λ\Lambda itself. While this mechanism most probably cannot work in the Standard Model if the scale Λ\Lambda is to be close to the Planck scale, we show that it can work in a minimal extension (Conformal Standard Model) proposed recently for a different implementation of soft conformal symmetry breaking.

Keywords

Cite

@article{arxiv.1404.0548,
  title  = {Softly broken conformal symmetry and the stability of the electroweak scale},
  author = {Piotr H. Chankowski and Adrian Lewandowski and Krzysztof A. Meissner and Hermann Nicolai},
  journal= {arXiv preprint arXiv:1404.0548},
  year   = {2015}
}

Comments

6 pages, 2 figures