Search for Scalar Leptoquark Pairs Decaying to $\nu \bar{\nu }q\bar{q}$ in \ppbar Collisions at $\sqrt{s}=1.96$ TeV

Abstract

We report on a search for the pair production of scalar leptoquarks, $LQ$, using 191 pb${}^{-1}$ of proton-antiproton collision data recorded by the CDF experiment during Run II of the Tevatron. The leptoquarks are sought via their decay into a neutrino and quark yielding missing transverse energy and several jets of large transverse energy. No evidence for leptoquark production is observed, and limits are set on $\sigma (p\bar{p}\to LQ\overline{LQ}X\to \nu \bar{\nu }q\bar{q}X)$. Using a next-to-leading order theoretical prediction of the cross section for scalar leptoquark production, we exclude first-generation leptoquarks in the mass interval 78 to 117 GeV$/c^2$ at the 95% confidence level for BR($LQ\to \nu q)=100$.

arXiv comment7 pages, 2 figures, Submitted to PRL

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• Constraints on New Physics from Long Baseline Neutrino Oscillation Experiments
• Review of searches for Higgs bosons and beyond the standard model physics at the Tevatron