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Probing dark matter with disappearing tracks at the LHC

Probing dark matter with disappearing tracks at the LHC
Probing dark matter with disappearing tracks at the LHC

Models where dark matter is a part of an electroweak multiplet feature charged particles with macroscopic lifetimes due to the charged-neutral mass split of the order of pion mass. At the Large Hadron Collider, the ATLAS and CMS experiments will identify these charged particles as disappearing tracks, since they decay into a massive invisible dark matter candidate and a very soft charged Standard-Model particle, which fails to pass the reconstruction requirements. While ATLAS and CMS have focused on the supersymmetric versions of these scenarios, we have performed here the reinterpretation of the latest ATLAS disappearing track search for a suite of dark matter multiplets with different spins and electroweak quantum numbers. More concretely, we consider the cases of the inert two Higgs doublet, minimal fermion dark matter and vector triplet dark matter models. Our procedure is validated by using the same wino and Higgsino benchmark models employed by the ATLAS Collaboration. We have found that with the disappearing track signature, one can probe a vast portion of the parameter space, well beyond the reach of prompt missing energy searches (notably monojets). We provide tables with the upper limits on the cross section and efficiencies in the lifetime - a dark matter mass plane for all the models under consideration, which can be used for an easy recast for similar classes of models. Moreover, we provide the recasting code employed here, as part of the public LLP recasting repository.

Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Prestel, Stefan
2369f8f6-09af-4ed8-866d-5b76f2886b3b
Rojas-Abbate, Felipe
0ddf439a-de98-4dc0-a7f4-623c27b48967
Zurita, Jose
d48f959a-bc9c-43f6-9a84-239e747bd773
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Prestel, Stefan
2369f8f6-09af-4ed8-866d-5b76f2886b3b
Rojas-Abbate, Felipe
0ddf439a-de98-4dc0-a7f4-623c27b48967
Zurita, Jose
d48f959a-bc9c-43f6-9a84-239e747bd773

Belyaev, Alexander, Prestel, Stefan, Rojas-Abbate, Felipe and Zurita, Jose (2021) Probing dark matter with disappearing tracks at the LHC. Physical Review D, 103 (9), [095006]. (doi:10.1103/PhysRevD.103.095006).

Record type: Article

Abstract

Models where dark matter is a part of an electroweak multiplet feature charged particles with macroscopic lifetimes due to the charged-neutral mass split of the order of pion mass. At the Large Hadron Collider, the ATLAS and CMS experiments will identify these charged particles as disappearing tracks, since they decay into a massive invisible dark matter candidate and a very soft charged Standard-Model particle, which fails to pass the reconstruction requirements. While ATLAS and CMS have focused on the supersymmetric versions of these scenarios, we have performed here the reinterpretation of the latest ATLAS disappearing track search for a suite of dark matter multiplets with different spins and electroweak quantum numbers. More concretely, we consider the cases of the inert two Higgs doublet, minimal fermion dark matter and vector triplet dark matter models. Our procedure is validated by using the same wino and Higgsino benchmark models employed by the ATLAS Collaboration. We have found that with the disappearing track signature, one can probe a vast portion of the parameter space, well beyond the reach of prompt missing energy searches (notably monojets). We provide tables with the upper limits on the cross section and efficiencies in the lifetime - a dark matter mass plane for all the models under consideration, which can be used for an easy recast for similar classes of models. Moreover, we provide the recasting code employed here, as part of the public LLP recasting repository.

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More information

Accepted/In Press date: 2 March 2021
Published date: 10 May 2021
Additional Information: Funding Information: Recently, CMS has made public a new disappearing track study , and the public reinterpretation material was only made public in July . Given the important differences between ATLAS and CMS in a) their inner tracker configurations and b) the analysis strategy, we leave the recasting of the CMS results for future work. The authors acknowledge the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work. We are indebted to Ryu Sawada for his valuable help with understanding the details of the ATLAS analysis. We also would like to thank Giovanna Cottin and Nishita Desai for useful discussions, and Andre Lessa for help with uploading our code to the LLP Recasting Repository, for the useful suggestions to improve the code and for being our first beta tester. A. B. acknowledges partial support from the STFC Grant No. ST/L000296/1 and the Soton-FAPESP grant. AB also thanks the NExT Institute and Royal Society International Exchange Grant No. IEC-R2-202018. F. R. acknowledges Funding for Postdoctoral research in Southampton University, United Kingdom, CONICYT Grant No. 74180065. This work has been supported by the Mainz Institute for Theoretical Physics (MITP) of the Cluster of Excellence PRISMA+ (Project No. 39083149). S. P. gratefully acknowledges funding from the Swedish Research Council, under Contract No. 2016-05996. Publisher Copyright: © 2021 authors. Published by the American Physical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

Identifiers

Local EPrints ID: 452813
URI: http://eprints.soton.ac.uk/id/eprint/452813
PURE UUID: 692cd6c4-3b4b-46ec-9d29-a8dddc77552c
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 21 Dec 2021 17:48
Last modified: 27 Apr 2022 01:50

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Contributors

Author: Stefan Prestel
Author: Felipe Rojas-Abbate
Author: Jose Zurita

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