Determining the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">t</mi><mrow><mrow><mover><mrow><mi>t</mi></mrow><mrow><mi>¯</mi></mrow></mover></mrow></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">ZZ</mi></math> Couplings of a Neutral Higgs Boson of Arbitrary <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">CP</mi></math> Nature at the Next Linear Collider

John F. Gunion; Bohdan Grzadkowski; Xiao-Gang He

doi:10.1103/PhysRevLett.77.5172

Determining the $t \bar{t}$ and $ZZ$ Couplings of a Neutral Higgs Boson of Arbitrary $CP$ Nature at the Next Linear Collider

John F. Gunion, Bohdan Grzadkowski, and Xiao-Gang He

Phys. Rev. Lett. 77, 5172 – Published 23 December 1996

Abstract

The optimal procedure for extracting the coefficients of different components of an observable which takes the form of unknown coefficients times functions of known form is developed. When applied to $e^{+} e^{-} \to t \bar{t} +$ Higgs production at $\sqrt{s} = 1$ TeV and integrated luminosity times efficiency of $50 {fb}^{- 1}$ , we find that the $t \bar{t} \to Higgs CP$ -even and CP-odd couplings and, to a lesser extent, the $ZZ \to Higgs$ (CP-even) coupling can be extracted with reasonable errors. Typically, a standard-model-like CP-even Higgs boson can be distinguished from a purely CP-odd Higgs boson at a high level of statistical significance, and vice versa.

Received 21 May 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.5172

Authors & Affiliations

John F. Gunion¹, Bohdan Grzadkowski^1,2, and Xiao-Gang He³

¹Davis Institute for High Energy Physics, University of California, Davis, California 95616
²Institute for Theoretical Physics, Warsaw University, Warsaw, Poland
³School of Physics, University of Melbourne, Parkville, Australia