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Physical Review D

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Higgs bosons of the NMSSM with explicit $C P$ violation at the ILC

S. W. Ham¹, S. H. Kim², S. K. Oh^1,2, and D. Son¹

¹Center for High Energy Physics, Kyungpook National University, Daegu 702-701, Korea
²Department of Physics, Konkuk University, Seoul 143-701, Korea

Phys. Rev. D 76, 115013 – Published 21 December, 2007

DOI: https://doi.org/10.1103/PhysRevD.76.115013

Abstract

We study the Higgs sector of the next-to-minimal supersymmetric standard model with explicit $C P$ violation at one-loop level, where the radiative corrections due to the quarks and squarks of the third generation are taken into account. We expect that, within a reasonable region of the parameter space of the present model, at least one of the five neutral Higgs bosons may be produced at the future $e^{+} e^{-}$ International Linear Collider with $\sqrt{s} = 500 GeV$ , with cross sections larger than 12 fb, 15 fb, and 1.5 fb, respectively, via the Higgs-strahlung process, the $W W$ fusion process, and the $Z Z$ fusion process. We find that the effect of the $C P$ phase in the present model yields significant influences upon the production cross sections of the five neutral Higgs bosons. We also study the decay modes of the five neutral Higgs bosons to find that their decay widths are similarly affected by the $C P$ phase. Some of the decay modes in the present model behave differently from those of the standard model.

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