Publication

Search for exotic Higgs boson decays H → AA with A → YY in events with a semi-merged topology in proton-proton collisions at s=13 TeV

2026

Abstract

A search for exotic Higgs boson decays H → AA, with A → YY is presented, using events with a semi-merged topology. One of the hypothetical particles, A, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other A decays into two resolved photons. The search is performed using proton-proton collision data collected by the CMS experiment at s=13 TeV, corresponding to an integrated luminosity of 138 fb−1. The data agree with the standard model background expectation. Upper limits are set on the product of the Higgs boson production cross section and the branching fraction, σ(pp → H) B(H → AA → 4γ), which range from 0.264 to 0.005 pb at 95% confidence level, for A masses in the range 1 < mA< 15 GeV. These limits are the most stringent to date in the 1–5 GeV mA range.

Official source

https://infoscience.epfl.ch/entities/publication/927c2e20-7dce-48ac-9f79-b745d5703935

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/927c2e20-7dce-48ac-9f79-b745d5703935

About this result

Related concepts (32)

Large Hadron Collider

The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel in circumference and as deep as beneath the France–Switzerland border near Geneva. The first collisions were achieved in 2010 at an energy of 3.

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Search for exotic Higgs boson decays H → AA with A → YY in events with a semi-merged topology in proton-proton collisions at s=13 TeV

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