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Probing the H3 vertex in e+e, γe, and γγ collisions for light and intermediate Higgs bosons

V. A. Ilyin* and A. E. Pukhov

Y. Kurihara and Y. Shimizu§

T. Kaneko

  • Institute of Nuclear Physics, Moscow State University, 119899 Moscow, Russia

  • National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki 305, Japan

  • Meiji-Gakuin University, Kamikurata, Totsuka 244, Japan

  • *Electronic address: ilyin@slava.npi.msu.su
  • Electronic address: pukhov@sasha.npi.msu.su
  • Electronic address: kurihara@minami.kek.jp
  • §Electronic address: shimiz@minami.kek.jp
  • Electronic address: kaneko@minami.kek.jp

Phys. Rev. D 54, 6717 – Published 1 December, 1996

DOI: https://doi.org/10.1103/PhysRevD.54.6717

Abstract

We study double Higgs boson production at future linear colliders while paying special attention to the option of high-energy and high-luminosity photon beams. The main purpose is to examine the feasibility of e+e, γe, and γγ colliders in order to establish bounds on the value of triple Higgs coupling, which could be crucial for understanding a spontaneous breaking mechanism. We consider mainly those cases of light and intermediate Higgs bosons, including an analysis of the electroweak backgrounds. The mass range MHMZ is discussed separately. It is shown that for a light Higgs boson the H3 coupling can be visible, even at a future linear e+e collider at 500 GeV. For an intermediate Higgs boson, a collider with TeV energies is suitable for investigations. We estimate the bounds on the anomalous H3 coupling which can be experimentally established at future linear colliders.

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