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\section{Introduction}
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\label{sec:intro}
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Same-sign isolated lepton-pairs are very rare in the Standard Model (SM) but
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appear very naturally in many new physics scenarios.
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In this paper we describe searches for new physics
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with same sign isolated dileptons ($ee$, $e\mu$, $\mu\mu$,
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$e\tau$, $\mu\tau$, and $\tau\tau$), missing transverse
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energy (\met) and jets. The results are based on
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a data sample corresponding to an integrated luminosity
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of 35 pb$^{-1}$ of $pp$ collisions
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collected by the CMS\cite{ref:CMS} experiment in 2010 at the Large
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Hadron Collider (LHC) at a center of mass of 7 TeV.
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This paper is organized as follows. The CMS detector is briefly
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described
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in Section~\ref{sec:detector}. The reconstruction of leptons,
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\met, and jets at CMS is summarized in Section~\ref{sec:objects}.
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We then describe three complementary searches
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in order to widely cover the parameter space of new physics.
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The first (Section~\ref{sec:leptrg})
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is a generic search based on high $P_T$ lepton triggers and
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explores the high \met and the high $H_T$ regions separately,
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where $H_{T}$ is a measure of the hadronic activity and is defined
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here as the scalar sum of all selected jet $P_T$.
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The second explores a higher $H_T$ kinematic region at lower lepton
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$P_T$, and thus relies on hadronic triggers (Section~\ref{sec:Florida}).
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The first two searches concentrate on the $ee$, $e\mu$, and $\mu\mu$ final states.
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The third search described in Section~\ref{sec:tau} includes final states
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with hadronic tau decays.
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