Collider constraints on electroweakinos in the presence of a light gravitino
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Date
2023
Authors
Ananyev, V.
Balázs, C.
Beniwal, A.
Braseth, L.L.
Buckley, A.
Butterworth, J.
Chang, C.
Danninger, M.
Fowlie, A.
Gonzalo, T.E.
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Journal article
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European Physical Journal C: Particles and Fields, 2023; 83(6):493-1-493-36
Statement of Responsibility
GAMBIT Collaboration: Viktor Ananyev, Csaba Balázs, Ankit Beniwal, Lasse Lorentz Braseth, Andy Buckley, Jonathan Butterworth, Christopher Chang, Matthias Danninger, Andrew Fowlie, Tomás E. Gonzalo, a, Anders Kvellestad, b, Farvah Mahmoudi, Gregory D. Martinez, Markus T. Prim, Tomasz Procter, Are Raklev, Pat Scott, Patrick Stöcker, Jeriek Van den Abeele, Martin White, Yang Zhang
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Abstract
Using the GAMBIT global fitting framework,we constrain theMSSMwith an eV-scale gravitino as the lightest supersymmetric particle, and the six electroweakinos (neutralinos and charginos) as the only other light new states.We combine 15 ATLAS and 12 CMS searches at 13TeV, along with a large collection of ATLAS and CMSmeasurements of StandardModel signatures. This model, which we refer to as the ˜G -EWMSSM,exhibits quite varied collider phenomenology due to its many permitted electroweakino production processes and decay modes. Characteristic ˜G -EWMSSM signal events have two or more Standard Model bosons and missing energy due to the escaping gravitinos. While much of the ˜G -EWMSSM parameter space is excluded, we find several viable parameter regions that predict phenomenologically rich scenarios with multiple neutralinos and charginos within the kinematic reach of the LHC during Run 3, or the High Luminosity LHC. In particular, we identify scenarios with Higgsino-dominated electroweakinos as light as 140GeV that are consistent with our combined set of collider searches and measurements. The full set of ˜G -EWMSSM parameter samples and GAMBIT input files generated for this work is available via Zenodo.
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Published online: 10 June 2023
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© The Author(s) 2023. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License,which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecomm ons.org/licenses/by/4.0/. Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.