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Selectron NLSP in gauge mediation

Calibbi, Lorenzo; Mariotti, Alberto; Petersson, Christoffer; Redigolo, Diego

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Authors

Lorenzo Calibbi

Alberto Mariotti

Christoffer Petersson

Diego Redigolo



Abstract

We discuss gauge mediation models in which the smuon and the selectron are mass-degenerate co-NLSP, which we, for brevity, refer to as selectron NLSP. In these models, the stau, as well as the other superpartners, are parametrically heavier than the NLSP. We start by taking a bottom-up perspective and investigate the conditions under which selectron NLSP spectra can be realized in the MSSM. We then give a complete characterization of gauge mediation models realizing such spectra at low energies. The splitting between the slepton families is induced radiatively by the usual hierarchies in the Standard Model Yukawa couplings and hence, no new sources of flavour misalignment are introduced. We construct explicit weakly coupled messenger models which give rise to selectron NLSP, while accommodating a 126 GeV MSSM Higgs mass, both within the framework of General Gauge Mediation and in extensions where direct couplings between the messengers and the Higgs fields are present. In the latter class of models, large A-terms and relatively light stops can be achieved. The collider signatures of these models typically involve multilepton final states. We discuss the relevant LHC bounds and provide examples of models where the decay of the NLSP selectron is prompt, displaced or long-lived. The prompt case can be viewed as an ultraviolet completion of a simplified model recently considered by the CMS collaboration.

Citation

Calibbi, L., Mariotti, A., Petersson, C., & Redigolo, D. (2014). Selectron NLSP in gauge mediation. Journal of High Energy Physics, 2014(9), Article 133. https://doi.org/10.1007/jhep09%282014%29133

Journal Article Type Article
Acceptance Date Sep 4, 2014
Online Publication Date Sep 23, 2014
Publication Date Sep 23, 2014
Deposit Date Apr 26, 2019
Publicly Available Date Jul 2, 2019
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Electronic ISSN 1029-8479
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2014
Issue 9
Article Number 133
DOI https://doi.org/10.1007/jhep09%282014%29133
Public URL https://durham-repository.worktribe.com/output/1303191

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
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.






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