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arXiv · 1212.3328

Light non-degenerate squarks at the LHC

Rakhi Mahbubani·Michele Papucci·Gilad Perez·Joshua T. Ruderman·Andreas Weiler
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Abstract

Experimental bounds on squarks of the first two generations assume their masses to be eightfold degenerate, and consequently constrain them to be heavier than ~ 1.4 TeV when the gluino is lighter than 2.5 TeV. The assumption of squark-mass universality is neither a direct consequence of Minimal Flavor Violation (MFV), which allows for splittings within squark generations, nor a prediction of supersymmetric alignment models, which allow for splittings between generations. We reinterpret a recent CMS multijet plus missing energy search allowing for deviations from U(2) universality, and show that the squark bounds are significantly weakened: a 400 GeV second-generation squark singlet is allowed, even with exclusive decays to a massless neutralino; and in an MFV scenario, the down-type squark singlets can be as light as 600 GeV provided the up-type singlets are pushed up to 1.8 TeV, for a 1.5 TeV gluino and decoupled doublet squarks.

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Rakhi Mahbubani, Michele Papucci, Gilad Perez, Joshua T. Ruderman, Andreas Weiler. 2012-12-13. Light non-degenerate squarks at the LHC. https://doi.org/10.1103/physrevlett.110.151804

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