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Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
CMS recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We provide an interpretation of the edge in terms of (anti-)squark pair production followed by the...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2014
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.91.115022 http://cds.cern.ch/record/1755382 |
Sumario: | CMS recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We provide an interpretation of the edge in terms of (anti-)squark pair production followed by the `golden cascade' decay for one of the squarks: $\tilde q \rightarrow \tilde\chi_2^0 q \to \tilde l l q \to \tilde\chi_1^0 q l l$ in the minimal supersymmetric standard model (MSSM). A simplified model involving binos, winos, an on-shell slepton, and the first two generations of squarks fits the event rate and the invariant mass edge while passing current collider constraints. We present the good-fit parameter space of the model, along with squark production predictions for LHC Run II conducted at 13 TeV centre of mass energy. Portions of the good-fit parameter space also predict a thermal relic density of neutralino dark matter $(\Omega h^2)$ compatible with cosmological observations, and an anomalous magnetic moment of the muon $(g-2)_\mu$ compatible with measurements. |
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