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Where sample statistics matter: ATLAS improves searches for rare Higgs boson decays with the large Run 3 data set

Kun Liu · CERN

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The decays of the Higgs boson into rare decay channels like H→Zγ→ℓℓγ and H→μμ are very challenging due to their small branching ratios and large backgrounds. The first decay, H→Zγ→ℓℓγ, is sensitive to potential BSM effects since SM contributions are loop-suppressed. The second provides the best opportunity to test the Yukawa sector for the 2nd fermion generation. This seminar will present improved analyses for both decay channels using the large Run 3 data set (data collected between 2022 and 2024) and the combinations with the respective Run 2 results. Thanks to the increase in the sample size and to better analysis techniques, these measurements significantly enhance the sensitivity to these rare Higgs boson decays over previous ATLAS publications.

Refreshments will be served at 10h30

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The talk

  1. Where sample statistics matter: ATLAS improves searches for rare Higgs boson decays with the large Run 3 data set 2025-07-15 · 1 h · CERN's player

Credits and licence

Institution
CERN
Department
LHC Seminar
Speaker
Kun Liu
Year
2025
Language
English
Subjects
Mathematics
Source
CERN
Licence
CERN, as CERN states it. CERN's terms
Attribution
© CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
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