Studying the Higgs Potential via $e^+e^- \to Zhh$

J. Kamoshita; Y. Okada; M. Tanaka; I. Watanabe

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arXiv · hep-ph/9602224

Studying the Higgs Potential via $e^+e^- \to Zhh$

J. Kamoshita·Y. Okada·M. Tanaka·I. Watanabe

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Abstract

The physics prospect at future linear $e^+e^-$ colliders for the study of the Higgs triple self-coupling via the process of $e^+e^-$ $\rightarrow Zhh$ is investigated. The measurement of this cross section leads us to the first non-trivial information on the Higgs potential. We found that the Standard Model and the model without the Higgs self-coupling can be distinguished at the level of one standard deviation for a rather light Higgs mass with 100 fb$^{-1}$ integrated luminosity. In the MSSM, the cross section is enhanced if the production of at least one of heavy Higgs bosons ($H$ or $A$) and its subsequent decay ($H \rightarrow hh$, $A \rightarrow Zh$) are kinematically allowed. When such processes are not allowed, the cross section in the region of small $m_A$ is significantly suppressed relative to the SM cross section.

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J. Kamoshita, Y. Okada, M. Tanaka, I. Watanabe. 1996-02-05. Studying the Higgs Potential via $e^+e^- \to Zhh$. https://arxiv.org/abs/hep-ph/9602224

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