Abstract
A search for direct production of supersymmetric gauginos and sleptons in final states with two and three leptons is presented. The two lepton analysis uses 4.7 fb(-1) of proton-proton collision data at root s = 7 TeV, while the three lepton analysis uses 13 fb(-1) at root s = 8 TeV. All data were recorded by the ATLAS detector at the Large Hadron Collider. The results are interpreted in the phenomenological minimal supersymmetric Standard Model, as well as simplified models. No significant excess above the Standard Model expectation is observed. Limits on the particle masses are placed at the 95% confidence level. In simplified models, chargino masses are excluded up to 580 GeV.
Highlights
that each known particle has a partner whose spin differs by one-half unit with respect
Conservation of R-parity implies that SUSY particles can only be produced in pairs
the mass eigenstates formed from the linear superposition of the SUSY partners
Summary
Supersymmetry (SUSY) [1,2,3,4,5,6,7,8,9] postulates that each known particle has a partner whose spin differs by one-half unit with respect to its Standard Model (SM) counterpart. The SUSY partners of the gluons, quarks and leptons are called gluinos (g), squarks (q) and sleptons ( ̃). A search for direct production of supersymmetric gauginos and sleptons in final states with leptons (electrons or muons) using the ATLAS [15] detector is presented. It is divided into two separate analyses, which are optimized independently. Righthanded charged sleptons are very heavy with masses above 100 TeV. Two scenarios, both with mχ02 = mχ±1 , are considered. All slepton masses are above 100 TeV. The event selection, signal regions, background evaluation method and results are presented
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