Journal article
Searches for direct slepton production in the compressed-mass corridor in sqrt(π) = 13 TeV π π collisions with the ATLAS detector
- Abstract:
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This paper presents searches for the direct pair production of charged light-flavour sleptons, each decaying into a stable neutralino and an associated Standard Model lepton. The analyses focus on the challenging βcorridorβ region, where the mass difference, Ξπ, between the slepton (πΛ or πΛ) and the lightest neutralino (πΛ 0 1 ) is less or similar to the mass of the π boson, π(π), with the aim to close a persistent gap in sensitivity to models with Ξπ β² π(π). Events are required to contain a high-energy jet, significant missing transverse momentum, and two same-flavour opposite-sign leptons (π or π). The analysis uses π π collision data at β π = 13 TeV recorded by the ATLAS detector, corresponding to an integrated luminosity of 140 fbβ1 . Several kinematic selections are applied, including a set of boosted decision trees. These are each optimised for different Ξπ to provide expected sensitivity for the first time across the full Ξπ corridor. The results are generally consistent with the Standard Model, with the most significant deviations observed with a local significance of 2.0 π in the selectron search, and 2.4 π in the smuon search. While these deviations weaken the observed exclusion reach in some parts of the signal parameter space, the previously present sensitivity gap to this corridor is largely reduced. Constraints at the 95% confidence level are set on simplified models of selectron and smuon pair production, where selectrons (smuons) with masses up to 300 (350) GeV can be excluded for Ξπ between 2 GeV and 100 GeV.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 3.3MB, Terms of use)
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- Publisher copy:
- 10.1007/jhep08(2025)053
Authors
Contributors
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Oxford college:
- Merton College
- Role:
- Contributor
- ORCID:
- 0000-0002-3533-3740
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Role:
- Contributor
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Role:
- Contributor
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Role:
- Contributor
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Role:
- Contributor
- Publisher:
- Springer
- Journal:
- Journal of High Energy Physics More from this journal
- Volume:
- 2025
- Issue:
- 8
- Article number:
- 53
- Publication date:
- 2025-08-06
- Acceptance date:
- 2025-07-01
- DOI:
- EISSN:
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2589-5559
- ISSN:
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1126-6708
- Language:
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English
- Keywords:
- Pubs id:
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2133739
- Local pid:
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pubs:2133739
- Deposit date:
-
2025-07-01
Terms of use
- Copyright holder:
- Aad et al.
- Copyright date:
- 2025
- Rights statement:
- Copyright Β© 2025, The Author(s). This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
- Licence:
- CC Attribution (CC BY)
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