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<p>The ATLAS collaboration, using 139 fb<sup>−1</sup> of 13 TeV collisions from the Large Hadron Collider, has placed limits on the decay of a <i>Z</i> boson to three dark photons. We reproduce the results of the ATLAS analysis, and then recast it as a limit on a exotic Higgs decay mode, in which the Higgs boson decays via a pair of intermediate (pseudo)scalars <i>a</i> to four dark photons <i>V</i> (or some other spin-one meson). Across the mass range for <i>m</i><sub><i>a</i></sub> and <i>m</i><sub><i>V</i></sub>, we find limits on the exotic Higgs branching fraction BR(<i>H</i> → <i>aa</i> → <i>V V V V</i> ) in the range of 4 × 10<sup>−5</sup> to 1 × 10<sup>−4</sup>.</p>

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Limits on an exotic Higgs decay from a recast ATLAS four-lepton analysis

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  • 发表日期：

    2025年5月27日

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  • Junyi Cheng,
  • Rabia Husain,
  • Lingfeng Li,
  • Matthew J. Strassler

摘要

The ATLAS collaboration, using 139 fb−1 of 13 TeV collisions from the Large Hadron Collider, has placed limits on the decay of a Z boson to three dark photons. We reproduce the results of the ATLAS analysis, and then recast it as a limit on a exotic Higgs decay mode, in which the Higgs boson decays via a pair of intermediate (pseudo)scalars a to four dark photons V (or some other spin-one meson). Across the mass range for ma and mV, we find limits on the exotic Higgs branching fraction BR(H → aa → V V V V ) in the range of 4 × 10−5 to 1 × 10−4.