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Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at √s=7TeV
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Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at √s=7TeV

G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, O. Abdinov, R. Aben, B. Abi, M. Abolins, …
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 卷.720(4-5), 頁碼.277-308
03/2013
DOI: https://doi.org/10.1016/j.physletb.2013.02.015

摘要

ATLAS GMSB LHC Long-lived R-hadron Slepton Nuclear and High Energy Physics
A search for long-lived particles is performed using a data sample of 4.7 fb -1 from proton-proton collisions at a centre-of-mass energy s=7TeV collected by the ATLAS detector at the LHC. No excess is observed above the estimated background and lower limits, at 95% confidence level, are set on the mass of the long-lived particles in different scenarios, based on their possible interactions in the inner detector, the calorimeters and the muon spectrometer. Long-lived staus in gauge-mediated SUSY-breaking models are excluded up to a mass of 300 GeV for tanβ=5-20. Directly produced long-lived sleptons are excluded up to a mass of 278 GeV. R-hadrons, composites of gluino (stop, sbottom) and light quarks, are excluded up to a mass of 985 GeV (683 GeV, 612 GeV) when using a generic interaction model. Additionally two sets of limits on R-hadrons are obtained that are less sensitive to the interaction model for R-hadrons. One set of limits is obtained using only the inner detector and calorimeter observables, and a second set of limits is obtained based on the inner detector alone. © 2013 CERN.

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