Multilepton Higgs Decays through the Dark Portal

TL;DR

This paper explores how the decay of a Higgs-like particle into dark sector particles could produce multilepton signals at the LHC, offering a new way to detect dark sector physics.

Contribution

It proposes a novel multilepton decay channel involving dark Higgs and dark photon particles within an Abelian Higgs model framework.

Findings

Potential multilepton signals at the LHC from dark sector decays

Dark photon mixing with the photon leads to observable signatures

Dark Higgs decays could produce distinctive multilepton jets

Abstract

The U(1)_D gauge sector containing one dark Higgs boson h_D and one dark photon \gamma_D may be explored through the decays of the 126 GeV particle discovered at the Large Hadron Collider (LHC), assumed here as the heavier mass eigenstate h_1 in the mixing of the standard model h with h_D. The various decays of h_1 to \gamma_D \gamma_D, h_2 h_2, h_2 \gamma_D \gamma_D and h_2 h_2 h_2 would yield multilepton final states through the mixing of \gamma_D with the photon and the decay h_2 \to \gamma_D \gamma_D, where h_2 is the lighter dark Higgs. Future searches for signals of multilepton jets at the LHC may reveal the existence of this possible dark sector governed simply by the original Abelian Higgs model.