Expectations for the Higgs boson identification at the ILC

TL;DR

This paper investigates how potential new physics could cause deviations in Higgs boson interactions at the ILC, using effective field theory and statistical analysis to identify possible deviations from the Standard Model.

Contribution

It provides a systematic analysis of Higgs production channels at the ILC within an effective field theory framework, exploring potential deviations from the Standard Model.

Findings

Global fits suggest possible deviations in Higgs-fermion couplings.

Expected ILC data can constrain anomalous Higgs couplings.

Analysis indicates the potential to detect new physics effects.

Abstract

Deviations from the standard Higgs sector generated by some new physics at an energy scale $\Lambda$ could be described by an effective $SU(3)_c \times SU(2)_L \times U(1)$ invariant non-renormalizable Lagrangian terms of dimension six. A systematic study of various Higgs boson production channels ($\gamma \gamma$, $ZZ$, $WW$, $b \bar b$, $\tau \bar \tau$) at the International Linear Collider (ILC) in the SM extension by effective operators is carried out. Statistical methods are used to establish a degree of consistency for the standard Higgs sector with the forthcoming data, using the expected ILC accuracies of the Higgs boson production channels. Global fits in the two-parametric anomalous coupling space indicating to possible deviations from the standard Higgs-fermion and Higgs-gauge boson couplings are performed.