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

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 $c\bar{b}\to H^{+}$, $cg\to b{H}^{+}$, and $\bar{b}g\to \bar{c}{H}^{+}$ 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.

Comments: 7 pages, 2 figures; contribution to the Proceedings of the 13th Large Hadron Collider Physics Conference (LHCP2025); v2: a few textual edits; accepted for publication on PoS