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

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 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 ${\mu }^{+}{\mu }^{-}$ $\to t\bar{t}$. Examining the effects gives us information on CP-parity for Higgs bosons and on the sign of a product of the coupling constants for $H{\mu }^{-}{\mu }^{+}$, $Ht\bar{t}$, $A{\mu }^{-}{\mu }^{+}$ and $At\bar{t}$ 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.

18 pages, LATEX file with 3 PS figures, some comments and references added

Cited by in corpus (5)

• Studying possible CP-violating Higgs couplings through top-quark pair productions at muon colliders
• Single Charged Higgs production as a probe of CP violation at a Muon Collider
• Disentangling CP phases in nearly degenerate resonances: neutralino production via Higgs at a muon collider
• Higgs boson interference in mu^+ mu^- ->chargino_i chargino_j with longitudinally polarized beams
• Interference of Higgs boson resonances in mu^+ mu^- -> neutralino_i neutralino_j with longitudinal beam polarization