Abstract
We consider a framework where the Standard Model is augmented by a second scalar doublet and by a real scalar singlet that, protected by a symmetry, provides a particle dark matter candidate. We show that this setup allows for doubly blind spots at both collider searches for anomalies in the Higgs invisible decay width, and at direct dark matter detection. The blind spots originate from cancellations between interfering diagrams featuring different neutral scalar exchanges and from cancellations driven by the two-Higgs doublet structure in the vertex coupling the singlet state with the Standard-Model-like Higgs. We demonstrate that the blind spots arise in a wide and generic array of realizations for the two-Higgs doublet model, including scenarios with a nontrivial flavor structure. We provide analytical formulas that describe the location of the blind spots in the theory parameter space, and we discuss the resulting phenomenology.
1 More- Received 8 July 2019
DOI:https://doi.org/10.1103/PhysRevD.100.055033
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society