Higher-order corrections to scalar couplings in BSM models with extended Higgs sectors

23 Jul 2018, 16:20
Plaza 1

Plaza 1


Johannes Braathen (LPTHE Paris)


The precise study of the Higgs boson properties -- in particular its mass and couplings -- is of paramount importance for the study of BSM models with enlarged Higgs sectors.
In particular, when investigating the high-scale behaviour of these models, the scalar quartic couplings must be extracted from the physical spectrum. I will show that it is then crucial to include all known higher-order corrections to this matching, and that the common habit of combining an N-1 loop matching together with N-loop RGE running often proves insufficient.
Moreover, there is also a growing interest for Effective Field Theories as they provide a framework to study the effects of heavy New Physics. In this context, I will present recent work on the matching of the scalar quartic couplings between general renormalisable theories, focusing especially on how to address the mixing among states and how a possible loss of accuracy due to large logarithmic contributions can be avoided.

Parallel Session Electroweak, Top and Higgs Physics

Primary author

Johannes Braathen (LPTHE Paris)


Mark Dayvon Goodsell (Centre National de la Recherche Scientifique (FR)) Dr Manuel E. Krauss (Bonn University) Toby Opferkuch (Universität Bonn) Pietro Slavich (LPTHE Paris) Florian Staub (KIT - Karlsruhe Institute of Technology (DE))

Presentation materials