Abstract
We present a search for new physics using events with two same-sign isolated leptons with/out the presence of b-jets in the final state, targetting two very different SUSY scenarios, one dominated by strong production of squarks and gluinos where the 3rd generation squarks are lighter than other squarks and the other dominated by electroweak production neglecting completely any strongly interacting particles. No excees above the standard model background is observed. The results are interpreted in various SUSY models.
Highlights
Events with same sign dilepton final states are very rare in the SM context, but they appear naturally in many different new physics scenarios such as SUSY where two same-sign dileptons can be produced in the decay chain of supersymetric particles
Same-sign dileptons can be sensitive to SUSY models with compressed spectra where the mass of the LSP is very close to the mass of the produced supersymetric particle, by requiring two same-sign leptons we can recover events that may skip other selections
The search is based on comparing observed and predicted yields in 8 signal regions with different requirements motivated by various possible new physics models
Summary
Events with same sign dilepton final states are very rare in the SM context, but they appear naturally in many different new physics scenarios such as SUSY where two same-sign dileptons can be produced in the decay chain of supersymetric particles. We will assume that the SUSY decay chain ends with the LSP (χ01 ), that escapes undetected and contribute strongly to the ETmiss of the event. Same-sign dileptons can be sensitive to SUSY models with compressed spectra where the mass of the LSP is very close to the mass of the produced supersymetric particle, by requiring two same-sign leptons we can recover events that may skip other selections. We search for SUSY using same sign dilepton events with hadronic activity and large ETmiss and we interpret the results in the context of various SUSY models. What we present here is just a short summary of the analysis performed by CMS [1], more details can be found in the original publication [2]
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