Sub-TeV $H^+$ Boson Production as Probe of Extra Top Yukawa Couplings

TL;DR

This paper proposes a method to detect sub-TeV charged Higgs bosons at the LHC through specific production and decay channels, highlighting the role of extra top Yukawa couplings in the process.

Contribution

It introduces a novel search strategy for charged Higgs bosons involving extra top Yukawa couplings within the two Higgs Doublet Model at the LHC.

Findings

Potential evidence for charged Higgs at 300-500 GeV with current data.

Enhanced discovery prospects with upcoming LHC Run 3 data.

Implications for understanding matter-antimatter asymmetry.

Abstract

We suggest searching for the charged Higgs boson at the Large Hadron Collider (LHC) via $cg \to b H^+ \to b t \bar b$. In the general two Higgs Doublet Model, extra top Yukawa couplings $\rho_{tc}$ and $\rho_{tt}$ can drive the disappearance of antimatter from the Universe, while $\bar cbH^+$ and $\bar tbH^+$ couple with strength $\rho_{tc}V_{tb}$ and $\rho_{tt}V_{tb}$, respectively. For $\rho_{tc},\, \rho_{tt} \sim 0.5$ and $m_{H^+} \sim 300$--500 GeV, evidence could emerge from LHC Run 2 data at hand, and discovery by adding Run 3 data in the near future.