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Type: Journal article
Title: Natural gauge mediation with a bino NLSP at the LHC
Author: Barnard, J.
Farmer, B.
Gherghetta, T.
White, M.
Citation: Physical Review Letters, 2012; 109(24):241801-1-241801-10
Publisher: American Physical Society
Issue Date: 2012
ISSN: 0031-9007
Statement of
James Barnard, Benjamin Farmer, Tony Gherghetta, and Martin White
Abstract: Natural models of supersymmetry with a gravitino lightest supersymmetric particle provide distinctive signatures at the LHC. For a neutralino next-to-lightest supersymmetric particle, sparticles can decay to two high energy photons plus missing energy. We use the ATLAS diphoton search with 4.8  fb−1 of data to place limits in both the top-squark–gluino and neutralino-chargino mass planes for this scenario. If the neutralino is heavier than 50 GeV, the lightest top squark must be heavier than 580 GeV, the gluino must be heavier than 1100 GeV, and charginos must be heavier than approximately 300–470 GeV. This provides the first nontrivial constraints in natural gauge mediation models with a neutralino next-to-lightest supersymmetric particle decaying to photons and implies a fine-tuning of at least a few percent in such models.
Rights: © 2012 American Physical Society
RMID: 0020132456
DOI: 10.1103/PhysRevLett.109.241801
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Appears in Collections:Chemistry and Physics publications

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