QCD, Dilaton and Infrared Fixed Points

by Roman Zwicky (Edinburgh University)

Thursday 19 Oct 2023, 13:30 → 14:30 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

I will review the standard conformal window picture and

explore the possibility that the chirally broken phase (QCD)

is amenable to an (non-perturbative) infrared fixed point interpretation.

I will show that these assumptions lead to a consistent picture

and comment on N=1 supersymmetric gauge theories.

In a second part I will further speculate on the presence of a dilaton,

and outline some of its attractive features.

1) compatibility of conformality with hadron masses

2) a solution to the Goldstone improvement problem

3) investigate the dilaton candidate of QCD, the sigma/f0(500) meson

At last I will give an outlook of how the Higgs can be interpreted as

a dilaton in this context and what the open problems are.