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Threshold effects in two-photon decays of Higgs particles

  • Theoratical Physics
  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

The couplings of Higgs particles to two photons are analyzed in the threshold region, where the Higgs mass is about twice the loop-particle mass leading to possible bound state formation. The amplitude of the pseudoscalar decay.A→γγ for pseudoscalar masses in the range of\((t\bar t)\)-bound state masses is calculated in leading and next-to-leading order inα s . It is shown that the real and imaginary parts of the form factor are significantly different from the lowest order perturbative one.

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Authors and Affiliations

  1. Novosibirsk State University, Novosibirsk-90, Russia

    Kirill Melnikov

  2. Theory Division, DESY, D-22603, Hamburg, Germany

    Michael Spira & Oleg Yakovlev

  3. Budker Institute for Nuclear Physics, Novosibirsk 90, Russia

    Oleg Yakovlev

Authors
  1. Kirill Melnikov
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  2. Michael Spira
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  3. Oleg Yakovlev
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Melnikov, K., Spira, M. & Yakovlev, O. Threshold effects in two-photon decays of Higgs particles. Z. Phys. C - Particles and Fields 64, 401–406 (1994). https://doi.org/10.1007/BF01560100

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  • DOI: https://doi.org/10.1007/BF01560100

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