Eur. Phys. J. C (2007) 51: 385-414
https://doi.org/10.1140/epjc/s10052-007-0323-6

Special Article - Scientific Note

Prospects for the measurement of the structure of the coupling of a Higgs boson to weak gauge bosons in weak boson fusion with the ATLAS detector

¹ Physikalisches Institut, Universität Bonn, Nussallee 12, 53115, Bonn, Germany
² Fachbereich Physik, Universität Siegen, Siegen, Germany

^* e-mail: ruwiedel@physik.uni-bonn.de

Received: 17 April 2007
Revised: 2 May 2007
Published online: 5 June 2007

Abstract

The prospects for the measurement of the tensor structure of the vertex between a standard model Higgs boson and two weak gauge bosons using the distribution of the azimuthal angles between the two tagging jets in the weak boson fusion channel are studied in a Monte Carlo analysis using the fast simulation of the ATLAS detector. The decay channels H→τ⁺τ^-→ll+4ν, H→τ⁺τ^-→lh+3ν at m_H=120 GeV and H→W⁺W^-→llνν at m_H=160 GeV are used in the analysis. For a standard model Higgs boson it is found that purely anomalous couplings are expected to be excluded at a confidence level corresponding to 2σ or more at m_H=120 GeV and more than 5σ at m_H=160 GeV from 30 fb^-1 of data. With a value of 1 roughly reproducing the standard model cross section for a purely anomalous coupling, the standard deviation in a measurement of a contribution of a CP even anomalous coupling in addition to the standard model coupling is estimated to be 0.20 at m_H=120 GeV and 0.09 at m_H=160 GeV.