Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators

Bauer, Martin; Haisch, Ulrich; Kahlhoefer, Felix

Abstract

We study a new class of renormalisable simplified models for dark matter searches at the LHC that are based on two Higgs doublet models with an additional pseudoscalar mediator. In contrast to the spin-0 simplified models employed in analyses of Run I data these models are self-consistent, unitary and bounds from Higgs physics typically pose no constraints. Predictions for various missing transverse energy (E T,miss) searches are discussed and the reach of the 13 TeV LHC is explored. It is found that the proposed models provide a rich spectrum of complementary observables that lead to non-trivial constraints. We emphasise in this context the sensitivity of the tt¯+ET,miss, mono-Z and mono-Higgs channels, which yield stronger limits than mono-jet searches in large parts of the parameter space. Constraints from spin-0 resonance searches, electroweak precision measurements and flavour observables are also derived and shown to provide further important handles to constraint and to test the considered dark matter models.

Citation

Bauer, M., Haisch, U., & Kahlhoefer, F. (2017). Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators. Journal of High Energy Physics, 2017(05), Article 138. https://doi.org/10.1007/jhep05%282017%29138

• Journal Article Type: Article
• Acceptance Date: May 14, 2017
• Online Publication Date: May 25, 2017
• Publication Date: May 31, 2017
• Deposit Date: Nov 27, 2018
• Publicly Available Date: Mar 5, 2020
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2017
• Issue: 05
• Article Number: 138
• DOI: https://doi.org/10.1007/jhep05%282017%29138
• Public URL: https://durham-repository.worktribe.com/output/1308548