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arXiv · 2507.03595

Evidence for the dimuon decay of the Higgs boson in pp collisions with the ATLAS detector

ATLAS Collaboration
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Abstract

A search for the dimuon decay of the Higgs boson is presented based on pp collision data recorded by ATLAS during Run 3 of the Large Hadron Collider, corresponding to an integrated luminosity of 165 fb$^{-1}$ at $\sqrt{s} = 13.6$ TeV. To enhance the sensitivity, the results are combined with those from Run 2. An excess of events over the background is observed with a significance of $3.4 \sigma$ ($2.5 \sigma$ expected). The best-fit signal strength is $\mu = 1.4\pm0.4$. This result provides evidence for the $H \to \mu\mu$ decay with ATLAS data and offers a direct probe of the Higgs-boson Yukawa coupling to second-generation fermions.

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ATLAS Collaboration. 2025-07-04. Evidence for the dimuon decay of the Higgs boson in pp collisions with the ATLAS detector. https://doi.org/10.1103/gzdh-p159

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