Report

PUBDB-2025-05806

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Reinterpretation of searches for flavour-violating supersymmetry into flavour-violating dark matter models using 139 fb−1 of ATLAS Run 2 data.

ATLAS Collaboration (Collaboration author)DESY*

2025

Report No.: ATL-PHYS-PUB-2025-010

Abstract: Weakly interacting massive particles are well motivated candidates to explain dark matter in the universe. However, the absence of clear evidence of the production of these particles at the LHC and of any direct or indirect detection impose stringent constraints on the model parameter space where this type of matter might exist. Dark matter models presenting a non-trivial flavour structure in the dark sector and flavour-violating interactions with the Standard Model sector evade these constraints. This note presents a study of the impact on these flavoured dark matter models of a published 139 fb−1 ATLAS search targeting flavour-violating supersymmetric models in signatures with a top quark, a charm quark and large missing transverse momentum. Different realisations of these models are considered, for which 95% CL limits are set on the mass of a new mediator ϕ and its coupling with dark matter and Standard Model quarks. Mediator masses up to 1.2 TeV can be excluded for different values of the strength of the interaction between dark matter and the Standard Model quarks.

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: ATLAS

Appears in the scientific report 2025

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