VIII International Conference "Models in Quantum Field Theory"

A simple generalization of the low-energy theorem for the effective Higgs-gluon-gluon coupling for the case of simultaneous decoupling of several heavy quarks

Oct 9, 2025, 2:30 PM

30m

Main hall

Session talk Section B: Quantum field theory methods in elementary particle physics Section B: Quantum field theory methods in elementary particle physics

Speaker

Konstantin Chetyrkin (ИЯИ РАН)

Description

We extend in a simple way the well-known low-energy theorem for an effective Higgs-like scalar-gluon-gluon coupling in QCD including arbitrary number of heavy quarks in addition to the light ones. The application of the extended low-energy theorem leads to a new result: an extraction of the four-loop effective Higgs-gluon-gluon coupling valid for extensions of the Standard Model with additional heavy quarks from the 3-loop results of A.G. Grozin et al (2011) for the decoupling constant of $\alpha_s$.

Presentation materials

dec25_Leningrad_251009_120601.pdf