Abstract
A search is presented for an extended Higgs sector with two new particles, X and $\phi$, in the process X $\to$$\phi\phi$$\to$$(\gamma\gamma)(\gamma\gamma)$. Novel neural networks classify events with diphotons that are merged and determine the diphoton masses. The search uses LHC proton-proton collision data at $\sqrt{s}$ = 13 TeV collected with the CMS detector, corresponding to an integrated luminosity of 138 fb$^{-1}$. No evidence of such resonances is seen. Upper limits are set on the production cross section versus the resonance masses, representing the most sensitive search in this channel.
Keywords
Physics
Luminosity
Particle physics
Higgs boson
Large Hadron Collider
Proton
Resonance (particle physics)
Nuclear physics
Production (economics)
Astrophysics
Subject Areas
Particle physics theoretical and experimental studies
·Nuclear and High Energy Physics ·Physical Sciences
Particle Detector Development and Performance
·Nuclear and High Energy Physics ·Physical Sciences
High-Energy Particle Collisions Research
·Nuclear and High Energy Physics ·Physical Sciences