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Multilepton Signatures from Dark Matter at the LHC

Multilepton Signatures from Dark Matter at the LHC
Multilepton Signatures from Dark Matter at the LHC
Leptonic signatures of Dark Matter (DM) are one of the cleanest ways to discover such a secluded form of matter at high energy colliders. We explore the full parameter space relevant to multi-lepton (2- and 3-lepton) signatures at the Large Hadron Collider (LHC) from representative minimal consistent models with scalar and fermion DM. In our analysis, we suggest a new parametrisation of the model parameter spaces in terms of the DM mass and mass differences between DM and its multiplet partners. This parametrisation allows us to explore properties of DM models in their whole parameter space. This approach is generic and quite model-independent since the mass differences are related to the couplings of the DM to the Standard Model (SM) sector. We establish the most up-to-date LHC limits on the inert 2-Higgs Doublet Model (i2HDM) and Minimal Fermion DM (MFDM) model parameter spaces, by using the complementary information stemming from 2- and 3-lepton signatures. We provide a map of LHC efficiencies and cross-section limits for such 2- and 3-lepton signatures allowing one to easily make model-independent reinterpretations of LHC results for analogous classes of models. We also present combined constraints from the LHC, DM relic density and direct search experiments indicating the current status of the i2HDM and MFDM model.
Dark Matter at Colliders, Models for Dark Matter, Particle Nature of Dark Matter
1126-6708
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Blumenschein, Ulla
ea1bc765-46c7-411f-9ca1-994e47a488ab
Freegard, Arran
10115e3a-0e9b-4a37-8f15-52f4354dc1f4
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Sengupta, Dipan
55b358cc-ce23-489b-b227-6e3c4652f8d3
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Blumenschein, Ulla
ea1bc765-46c7-411f-9ca1-994e47a488ab
Freegard, Arran
10115e3a-0e9b-4a37-8f15-52f4354dc1f4
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Sengupta, Dipan
55b358cc-ce23-489b-b227-6e3c4652f8d3

Belyaev, Alexander, Blumenschein, Ulla, Freegard, Arran, Moretti, Stefano and Sengupta, Dipan (2022) Multilepton Signatures from Dark Matter at the LHC. Journal of High Energy Physics, 2022 (9), [173]. (doi:10.1007/JHEP09(2022)173).

Record type: Article

Abstract

Leptonic signatures of Dark Matter (DM) are one of the cleanest ways to discover such a secluded form of matter at high energy colliders. We explore the full parameter space relevant to multi-lepton (2- and 3-lepton) signatures at the Large Hadron Collider (LHC) from representative minimal consistent models with scalar and fermion DM. In our analysis, we suggest a new parametrisation of the model parameter spaces in terms of the DM mass and mass differences between DM and its multiplet partners. This parametrisation allows us to explore properties of DM models in their whole parameter space. This approach is generic and quite model-independent since the mass differences are related to the couplings of the DM to the Standard Model (SM) sector. We establish the most up-to-date LHC limits on the inert 2-Higgs Doublet Model (i2HDM) and Minimal Fermion DM (MFDM) model parameter spaces, by using the complementary information stemming from 2- and 3-lepton signatures. We provide a map of LHC efficiencies and cross-section limits for such 2- and 3-lepton signatures allowing one to easily make model-independent reinterpretations of LHC results for analogous classes of models. We also present combined constraints from the LHC, DM relic density and direct search experiments indicating the current status of the i2HDM and MFDM model.

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2204.06411v1 - Accepted Manuscript
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More information

Accepted/In Press date: 1 August 2022
Published date: 21 September 2022
Additional Information: Publisher Copyright: © 2022, The Author(s).
Keywords: Dark Matter at Colliders, Models for Dark Matter, Particle Nature of Dark Matter

Identifiers

Local EPrints ID: 472294
URI: http://eprints.soton.ac.uk/id/eprint/472294
ISSN: 1126-6708
PURE UUID: 8f094169-674e-429f-828c-ea781fdbbfa5
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408
ORCID for Stefano Moretti: ORCID iD orcid.org/0000-0002-8601-7246

Catalogue record

Date deposited: 30 Nov 2022 17:49
Last modified: 01 Feb 2023 02:40

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Contributors

Author: Ulla Blumenschein
Author: Arran Freegard
Author: Stefano Moretti ORCID iD
Author: Dipan Sengupta

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