Search for new physics using events with two same-sign isolated leptons in the final state in pp collisions at 8 TeV

TL;DR

This study searches for signs of new physics in proton-proton collisions at 8 TeV by analyzing events with two same-sign isolated leptons, jets, and missing energy, but finds no deviations from the standard model.

Contribution

It introduces a comprehensive search strategy for new physics using multiple event regions in LHC data with no observed excess, setting constraints on various models.

Findings

No excess above standard model background observed

Constraints set on multiple new physics models

Analysis covers a wide range of event topologies

Abstract

A search for new physics is performed based on events with jets and a pair of isolated, same-sign leptons. The results are obtained using a sample of proton-proton collision data collected by the CMS experiment at a centre-of-mass energy of 8 TeV at the LHC, corresponding to an integrated luminosity of 19.5 inverse femtobarns. In order to be sensitive to a wide variety of possible signals beyond the standard model, multiple search regions defined by the missing transverse energy, the hadronic energy, the number of jets and b-quark jets. No excess above the standard model background expectation is observed and constraints are set on a number of models for new physics.