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Modified Signals for Supersymmetry in the NMSSM with a Singlino-like LSP · Around

2012

Modified Signals for Supersymmetry in the NMSSM with a Singlino-like LSP

Das, Debottam, Ellwanger, Ulrich, Teixeira, Ana M.

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In the framework of the NMSSM with a singlino-like LSP, we study quantitatively the impact of the additional bino -> singlino cascade on the efficiencies in several search channels for supersymmetry of the ATLAS and CMS collaborations.

Compared to the MSSM, the additional cascade reduces the missing transverse energy, but leads to additional jets or leptons.
For the NMSSM benchmark lines which generalize cMSSM benchmark points, the efficiencies in the most relevant 2/3 jet + missing energy search channels can drop by factors ~1/3 to ~1/7, and can reduce the present lower bounds on M_{1/2} by as much as ~0.9 - 0.75 in the NMSSM for large bino-singlino mass differences.
The larger efficiencies in multijet or multilepton search channels are not strong enough to affect this conclusion.

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