Search for Second-Generation Scalar Leptoquarks in $\bm{p \bar{p}}$ Collisions at $\sqrt{s}$=1.96 TeV

TL;DR

This paper reports a search for second-generation scalar leptoquarks in proton-antiproton collisions at 1.96 TeV, using data from the CDF detector, setting limits on their production cross section and mass.

Contribution

It provides the first experimental limits on second-generation scalar leptoquark production at Tevatron energies based on 200 pb$^{-1}$ of data.

Findings

No evidence for leptoquark production was observed.

Established 95% confidence level upper limits on production cross sections.

Set lower mass limits for leptoquarks depending on decay branching fraction.

Abstract

Results on a search for pair production of second generation scalar leptoquark in $p \bar{p}$ collisions at $\sqrt{s}$=1.96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002-2003 Tevatron Run II and correspond to an integrated luminosity of 198 pb$^{-1}$. Leptoquarks (LQ) are sought through their decay into (charged) leptons and quarks, with final state signatures represented by two muons and jets and one muon, large transverse missing energy and jets. We observe no evidence for $LQ$ production and derive 95% C.L. upper limits on the $LQ$ production cross sections as well as lower limits on their mass as a function of $\beta$, where $\beta$ is the branching fraction for $LQ \to \mu q$.