New Physics in LHC Higgs boson pair production

TL;DR

This paper analyzes how new physics beyond the Standard Model could affect Higgs pair production at the LHC, offering insights into electroweak symmetry breaking through various theoretical scenarios.

Contribution

It provides a comprehensive comparison of electroweak new physics effects in di-Higgs and di-Higgs+jet production, including resonant and non-resonant scenarios.

Findings

Resonant di-Higgs phenomenology in Higgs portal and MSSM models.

Non-resonant contributions from pseudo-Nambu-Goldstone Higgs models.

Di-Higgs and di-Higgs+jet measurements can elucidate electroweak symmetry breaking.

Abstract

Multi-Higgs production provides a phenomenologically clear window to the electroweak symmetry breaking sector. We perform a comprehensive and comparative analysis of new electroweak physics effects in di-Higgs and di-Higgs+jet production. In particular, we discuss resonant di-Higgs phenomenology, which arises in the Higgs portal model and in the MSSM at small tan beta, and non-resonant new physics contributions to di-Higgs production in models where the newly discovered Higgs candidate is interpreted as a pseudo-Nambu-Goldstone boson. We show that, for all these scenarios, a measurement of the di-Higgs and di-Higgs+jet final states provides an accessible and elaborate handle to understand electroweak symmetry breaking in great detail.