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arXiv · 1206.7110

Low-mass Higgs decays to four leptons at one loop and beyond

Bernd A. Kniehl·Oleg L. Veretin
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Abstract

The ongoing searches for Higgs-boson signals in data taken at the CERN LHC and the Fermilab Tevatron crucially rely on the decay channels H -> Z l l and H -> W l nu. We present a precision study of the partial widths of these decay channels including the full one-loop electroweak corrections and the dominant contributions at two and three loops, of O(G_F^2 m_t^4), O(G_F m_t^2 alpha_s), and O(G_F m_t^2 alpha_s^2). Since the invariant mass of the off-shell intermediate boson is relatively low in the mass window 115 GeV < m_H < 129 GeV of current interest, lepton mass effects are relevant, especially for the tau lepton.

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Bernd A. Kniehl, Oleg L. Veretin. 2012-08-14. Low-mass Higgs decays to four leptons at one loop and beyond. https://doi.org/10.1103/physrevd.86.053007

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