2019 Impact factor 4.389
Particles and Fields
Eur. Phys. J. C 17, 279-284
DOI 10.1007/s100520000454

Production of CP-even and CP-odd Higgs bosons
at muon colliders

E. Asakawa1 - A. Sugamoto1 - I. Watanabe2

1 Department of Physics and Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo 112-8610, Japan
2 Akita Keizaihoka University, Akita 010-8515, Japan

Received: 2 April 2000 / Published online: 31 August 2000 - © Springer-Verlag 2000

Abstract
In the s-channel Higgs-boson exchange processes, the interference between the amplitudes for CP-even and CP-odd Higgs bosons is sizable, if the helicities of the initial and final particles are properly fixed and if the mass difference between these bosons is not much larger than their decay widths. We discuss this interference effect in the process $\mu^+ \mu^-$ $\rightarrow t\overline{t}$. Examining the effect gives us information on the CP-parity for the Higgs bosons and on the sign of the product of the coupling constants for the $H\mu^-\mu^+$, $Ht\overline{t}$, $A\mu^-\mu^+$ and $At\overline{t}$ vertices. The feasibility of observing the interference effect in future muon colliders is evaluated in the framework of the minimal supersymmetric extension of the standard model as an example.


Copyright Società Italiana di Fisica, Springer-Verlag 2000