Search for lepton cascades in like-sign dilepton\\ events with jets at CDF with 6.1 fb$^{-1}$ using simplified models
V. Rusu, FNAL
D. Whiteson and R. Porter, UC Irvine
P. Wittich and P. Kittiwisit, Cornell
Abstract:
We present a search for cascade decays of new particles leading to leptons and
invisible particles, typical of supersymmetric decays or universal
extra dimensions. We analyze events with two leptons of the same
electric charge using data with an integrated
luminosity of 6.1 fb$^{-1}$. The observed data are consistent with
standard model predictions, and we set cross-section upper limits on
production of squarks and gluinos (or UED equivalent), as a function
of the new particle masses.
These limits may be applied to any SUSY or UED theory which includes
these production and decay modes.
Companion analysis: inclusive like-sign dileptons
Conference note
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Distribution of missing transverse energy in observed same-sign dilepton events with at least two jets and expected backgrounds. |
Distribution of $H_T$ in observed same-sign dilepton events with at least two jets and expected backgrounds. |
Feynman diagrams of gluino production with subsequent decays leading to same-sign dileptons. |
Feynman diagrams of squark pair production with subsequent decays leading to same-sign dilepton (left), trilepton (center), and four-lepton (right) final states. Diagrams are similar for gluino pair production (not shown). |
Selection efficiency for squark and gluino events, shown as a function of the mass difference between $\tilde{\chi |
Distribution of $H_T$ in observed same-sign dilepton events with at least two jets and expected backgrounds, with expected 200 GeV squark pair signal overlaid. |
Limits on squark pair production for LSP mass of 50 GeV (left) and 100 GeV (right). |
Limits on gluino pair production for LSP mass of 50 GeV (left) and 100 GeV (right). |
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