Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √ s = 8 TeV pp collisions with the ATLAS detector

Aad, G. and Abajyan, T. and Abbott, B. and Abdallah, J. and Abdel, Khalek S. and Abdinov, O. and Aben, R. and Abi, B. and Abolins, M. and AbouZeid, O. S. and Abramowicz, H. and Abreu, H. and Abulaiti, Y. and Acharya, B. S. and Adamczyk, L. and Adams, D. L. and Adelman, J. and Adomeit, S. and Adye, T. and Agatonovic-Jovin, T. and Aguilar-Saavedra, J. A. and Agustoni, M. and Ahlen, S. P. and Ahmad, A. and Ahmadov, F. and Aielli, G. and Akesson, T. P. A. and Akimoto, G. and Akimov, A. V. and Albert, J. and Krasznahorkay, Attila and Nagai, Yoshikazu and Pásztor, Gabriella and Tóth, József (2014) Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √ s = 8 TeV pp collisions with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS (4). ISSN 1126-6708

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Abstract

A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb − 1 of √ s = 8 TeV proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with the Standard Model expectations and limits are set in R - parity-conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models, significantly extending previous results. For simplified supersymmetric models of direct chargino ( χ˜ ±1 ) and next-to-lightest neutralino ( χ˜ 02) production with decays to lightest neutralino ( χ˜ 01) via either all three generations of sleptons, staus only, gauge bosons, or Higgs bosons, χ˜ ±1 and χ˜ 02 masses are excluded up to 700 GeV , 380 GeV , 345 GeV, or 148 GeV respectively, for a massless χ˜ 01.

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