LHC Dark Matter Working Group: Next-generation spin-0 dark matter Models
Date
2020
Authors
Abe, Tomohiro
Afik, Yoav
Albert, Andreas
Anelli, Christopher R.
Barak, Liron
Bauer, Martin
Behr, J. Katharina
Bell, Nicole F.
Boveia, Antonio
Brandt, Oleg
Journal Title
Journal ISSN
Volume Title
Publisher
Physics of the Dark Universe
Abstract
Dark matter (DM) simplified models are by now commonly used by the ATLAS and CMS Collaborations
to interpret searches for missing transverse energy (Emiss
T ). The coherent use of these models sharpened
the LHC DM search program, especially in the presentation of its results and their comparison to
DM direct-detection (DD) and indirect-detection (ID) experiments. However, the community has been
aware of the limitations of the DM simplified models, in particular the lack of theoretical consistency
of some of them and their restricted phenomenology leading to the relevance of only a small subset
of Emiss
T signatures. This document from the LHC Dark Matter Working Group identifies an example
of a next-generation DM model, called 2HDM+a, that provides the simplest theoretically consistent
extension of the DM pseudoscalar simplified model. A comprehensive study of the phenomenology of
the 2HDM+a model is presented, including a discussion of the rich and intricate pattern of mono-X
signatures and the relevance of other DM as well as non-DM experiments. Based on our discussions, a
set of recommended scans are proposed to explore the parameter space of the 2HDM+a model through
LHC searches. The exclusion limits obtained from the proposed scans can be consistently compared to
the constraints on the 2HDM+a model that derive from DD, ID and the DM relic density.
Description
Keywords
Citation
Abe, T., Afik, Y., Alber, A., Anelli, C.R., Barak, L., Bauer, M., … Zhou, C. (2020). LHC Dark Matter Working Group: Next-generation spin-0 dark matter models. Physics of the Dark Universe, 27, 100351. https://doi.org/10.1016/j.dark.2019.100351