Measuring Anomalous Couplings in H->WW* Decays at the International Linear Collider

Yosuke Takubo, Robert N. Hodgkinson, Katsumasa Ikematsu, Keisuke Fujii, Nobuchika Okada, Hitoshi Yamamoto

Published 2010-11-26, updated 2013-05-17Version 4

Measurement of the Higgs coupling to W-bosons is an important test of our understanding of the electroweak symmetry breaking mechanism. We study the sensitivity of the International Linear Collider (ILC) to the presence of anomalous HW+W- couplings using ZH -> nu nu WW* -> nu nu 4j events. Using an effective Lagrangian approach, we calculate the differential decay rates of the Higgs boson including the effects of new dimension-5 operators. We present a Monte Carlo simulation of events at the ILC, using a full detector simulation based on geant4 and a real event reconstruction chain. Expected constraints on the anomalous couplings are given.