Undoubtable signs of CP-violation in Higgs decays at the LHC run 2

TL;DR

This paper proposes a method to detect undeniable signs of CP-violation in Higgs decays at the LHC run 2 by analyzing specific decay combinations involving the Higgs, Z boson, and additional scalars, using a two-Higgs doublet model.

Contribution

It introduces a novel approach combining three decay channels to identify clear CP-violation signals in Higgs physics, supported by benchmark points within a complex two-Higgs doublet model.

Findings

Identified decay scenarios with large cross sections suitable for detection during run 2.

Presented benchmark points consistent with current constraints that exhibit CP-violation signals.

Demonstrated the feasibility of observing CP-violation through specific decay combinations.

Abstract

With the discovery of the Higgs boson at the Large Hadron Collider the high energy physics community's attention has now turned to understanding the properties of the Higgs boson, together with the hope of finding more scalars during run 2. In this work we discuss scenarios where using a combination of three decays, involving the 125 GeV Higgs boson, the Z boson and at least one more scalar, an indisputable signal of CP-violation arises. We use a complex two-Higgs doublet model as a reference model and present some benchmark points that have passed all current experimental and theoretical constraints, and that have cross sections large enough to be probed during run 2.