CERN Accelerating science

Article
Report number	arXiv:1409.3532 ; DAMTP-2014-52
Title	Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
Author(s)	Allanach, Ben (Cambridge U., DAMTP) ; Raklev, Are R (Oslo U. ; Cambridge U., DAMTP) ; Kvellestad, Anders (Oslo U.)
Publication	2015
Imprint	11 Sep 2014
Number of pages	5
Note	Comments: 5 pages, 8 figures Comments: 7 pages, 11 figures, v2 fixes problem with axis of Fig. 1 and has some minor changes to text, v3 is a significant revision including new LHC searches which rules out the golden channel interpretation at 95$\%$ confidence level
In:	Phys. Rev. D 91 (2015) 115022
DOI	10.1103/PhysRevD.91.115022
Subject category	Particle Physics - Phenomenology
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	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.
Copyright/License	arXiv nonexclusive-distrib. 1.0

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