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After ten years what AI is saying about the Diphoton results at CERN

Bruce CamberLeave a comment

by AI

The net net of the diphton results at CERN in 2015.

Diphoton results at CERN have primarily focused on two main areas: searches for new resonances decaying into two photons and measurements of Higgs boson properties in the diphoton decay channel.

750 GeV diphoton excess

  • In December 2015, both the ATLAS and CMS collaborations at CERN reported an excess of diphoton events at an invariant mass of about 750 GeV.
  • This excess, if real, would have implied the existence of a new particle or resonance beyond the Standard Model.
  • The anomaly generated significant interest, leading to numerous theoretical studies exploring possible explanations.
  • However, with more data collected in 2016, the anomaly was not observed and was concluded to be a statistical fluctuation. 

Higgs boson diphoton decay channel

  • The diphoton channel (H → γγ) is one of the Higgs boson decay channels studied at the LHC.
  • The Higgs boson does not decay directly into two photons, but rather through a loop of virtual particles, which could include undiscovered particles beyond the Standard Model.
  • Measurements of the Higgs boson mass in this channel have provided the most precise measurement of the Higgs mass, which is 125.38 ± 0.14 GeV based on combined data from CMS from Run 1 and Run 2.
  • Studies of the diphoton decay rate can offer insights into the properties of the Higgs boson and potential new physics beyond the Standard Model.
  • The latest results from CMS on searches for low-mass Higgs bosons in the diphoton final state show an excess at 95 GeV with a local significance of 2.9σ, which is compatible with corresponding ATLAS searches.
  • This excess could potentially be interpreted as the lightest Higgs boson in a Two-Higgs doublet model extended by a complex singlet (S2HDM), according to a study published on arXiv. 

In summary

Diphoton results at CERN have played a crucial role in studying the properties of the Higgs boson and searching for new physics. While the 750 GeV anomaly turned out to be a statistical fluctuation, searches for low-mass Higgs bosons in the diphoton channel have yielded interesting results that continue to be investigated, potentially hinting at physics beyond the Standard Model.

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