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\section{Introduction} |
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\label{ref:intro} |
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This note presents a search for the production of supersymmetric (SUSY) stop quark pairs in events with a |
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single isolated lepton, several jets, missing transverse energy, and large transverse mass. We use the full |
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\end{itemize} |
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Both of these signatures contain high transverse momentum (\pt) jets including two b-jets, and missing transverse |
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energy (\MET) due to the invisible $\chi^0_1$ lightest SUSY particles (LSP's). In addition, the presence of |
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energy (\met) due to the invisible $\chi^0_1$ lightest SUSY particles (LSP's). In addition, the presence of |
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two W bosons leads to a large branching fraction to the single lepton final state. Hence we require the presence |
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of exactly one isolated, high \pt electron or muon, which provides significant suppression of several backgrounds |
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that are present in the all-hadronic channel. The largest backgrounds for this signature are semi-leptonic \ttbar\ |
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\begin{figure}[hbt] |
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\begin{center} |
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\includegraphics[width=0.4\linewidth]{plots/stop.pdf} |
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\includegraphics[width=0.5\linewidth]{plots/total_scale_pdf_LHC-eps-converted-to.pdf} |
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\caption{ |
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\label{fig:stopxsec}\protect |
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The stop quark pair production cross section in pb, as a function of the stop quark mass.} |
