Higgs boson decays into narrow diphoton jets and their search strategies at the Large Hadron Collider

In many extensions of the Standard Model, the Higgs boson can decay into two light scalars, each of which then subsequently decay into two photons. The underlying event is h -> 4 gamma, but the kinematics from boosted light scalar decays combined with realistic detector resolutions may fail to register the events in straightforward categories and thus may be lost. In this article, we investigate the phase space for highly boosted diphoton events from these exotic Higgs decays and discuss search strategies that aim to capture and label events in this difficult region. In the process, we develop a new category, xi jets, which identifies with high selectivity highly collimated diphoton decay modes of the Higgs boson.

Automated summary

In this article, the phase space for highly boosted diphoton events from exotic Higgs decays is investigated, and search strategies to capture and label events in this challenging region are discussed. A new category xi jets is developed with high selectivity to identify highly collimated diphoton decay modes of the Higgs boson.