Expectations for probing the Higgs-fermion and the Higgs-vector boson couplings at the ILC

摘要

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) x SU(2)(L) x U(1) invariant non-renormalizable Lagrangian terms of dimension six. A systematic study of various Higgs boson production x decay channels (gamma gamma, ZZ, WW, b (b) over bar, tau(tau) over bar) 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 possible deviations from the standard Higgs-fermion and Higgs-gauge boson couplings are performed. (C) 2014 The Authors. Published by Elsevier B.V.