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\begin{abstract}
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We present results of a search for physics beyond the Standard Model (SM)
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in final states with $Z$ bosons,
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hadronic
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jets, and missing transverse energy. The search is based on
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a 34~pb$^{-1}$ data
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sample of 7~TeV proton-proton collisions collected by the CMS detector
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at the Large Hadron Collider in 2010.
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The event yields are compatible with SM expectations.
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We set upper limits on the product of cross-section, branching
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fraction, and kinematical acceptance for events with $Z \to \ell \ell$
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($\ell = e$ or $\mu$), at least two jets of transverse momentum
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$>$ 30 GeV in the pseudorapidity region $|\eta|<2.5$, and
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with missing transverse energy $> 60$ GeV or 120 GeV.
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We find that these limits are only weakly model dependent.
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They are $\sigma \times {\cal B} \times {\cal A} < 0.5$ pb and
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$<$ 0.2 pb at the 95\% confidence level for the looser and tigher
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missing transverse energy requirements, respectively.
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We also provide additional information to test whether specific models
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of physics beyond the SM are excluded by our results.
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\end{abstract} |
