Searching for charged Higgs bosons with flavor-changing couplings at the LHC

TL;DR

This paper explores the potential for discovering charged Higgs bosons with flavor-changing couplings at the LHC within the general two Higgs doublet model, highlighting unique production and decay channels that could reveal new physics.

Contribution

It introduces the investigation of flavor-changing neutral Higgs couplings in charged Higgs production and decay at the LHC, emphasizing resonant production and its implications for new physics and baryon asymmetry.

Findings

Resonant $c\bar b \to H^+$ production is promising for detection.

Flavor-changing couplings can lead to distinctive signatures at the LHC.

Potential connection to baryon asymmetry through sizable FCNH couplings.

Abstract

We investigate the LHC discovery prospects for charged Higgs bosons in the general two Higgs doublet model (G2HDM) that has flavor-changing neutral Higgs (FCNH) couplings. The FCNH $\rho_{tc}$ coupling induces intriguing $H^+$ production processes $c\bar b \to H^+$, $cg \to bH^+$, and $\bar bg \to \bar cH^+$ without CKM suppression. Sizable $\rho_{tc}$ can drive the disappearance of antimatter from the Universe. In this contribution, we promote the resonant $c\bar b \to H^+$ production, followed by the bosonic $H^+ \to W^+ H$ decay. Discovery could be a harbinger of G2HDM with FCNH couplings, and perhaps shed light on the baryon asymmetry of the Universe.