Expectation management

TL;DR

This paper introduces a modified approach combining tadpole treatment with effective field theory matching to accurately calculate neutral scalar masses, including the Higgs, in theories beyond the Standard Model, especially with small expectation values.

Contribution

It develops a formalism that improves scalar mass calculations by integrating tadpole treatment with EFT matching, addressing limitations of standard methods in BSM theories.

Findings

Formalism for matching Higgs quartic coupling via pole masses at one loop.

Application to toy model demonstrating improved accuracy.

Application to μNMSSM showing effectiveness in complex models.

Abstract

We consider the application of a Fleischer$-$Jegerlehner-like treatment of tadpoles to the calculation of neutral scalar masses (including the Higgs) in general theories beyond the Standard Model. This is especially useful when the theory contains new scalars associated with a small expectation value, but comes with its own disadvantages. We show that these can be overcome by combining with effective field theory matching. We provide the formalism in this modified approach for matching the quartic coupling of the Higgs via pole masses at one loop, and apply it to both a toy model and to the $\mu$NMSSM as prototypes where the standard treatment can break down.