# Astroparticle Physics News

## Rare Higgs boson decay lighting the way

#### The Higgs boson was first observed at the LHC  by ATLAS and CMS in 2012, and confirmed in 2013. Many of the predicted properties of the Higgs boson have since been observed at the LHC. New evidence of a rare Higgs boson decay indicates such detailed studies may be the new norm, and by studying the decay angles may shed light on CP symmetry violation.

It was announced on February 2, 2021, that ATLAS has found evidence for a rare Higgs boson decay – the Higgs boson decaying into a photon ($$\gamma$$) and a lepton pair ($$\ell \ell$$). Confirming predicted decay branches for the Higgs boson enables further investigation of its properties and testing of the Standard Model.