Second Generation Leptoquark Search in p\bar{p} Collisions at $\sqrt{s}$ = 1.8 TeV

TL;DR

This paper reports a search for second generation leptoquarks in proton-antiproton collisions at 1.8 TeV, setting mass limits based on the absence of observed signals in the data.

Contribution

First search for second generation leptoquarks at Fermilab Tevatron using the DØ detector, establishing new lower mass limits at 95% confidence level.

Findings

Lower mass limit of 111 GeV/c² for β=1

Lower mass limit of 89 GeV/c² for β=0.5

No evidence of leptoquark production observed

Abstract

We report on a search for second generation leptoquarks with the D\O\ detector at the Fermilab Tevatron $p\bar{p}$ collider at $\sqrt{s}$ = 1.8 TeV. This search is based on 12.7 pb$^{-1}$ of data. Second generation leptoquarks are assumed to be produced in pairs and to decay into a muon and quark with branching ratio $\beta$ or to neutrino and quark with branching ratio $(1-\beta)$. We obtain cross section times branching ratio limits as a function of leptoquark mass and set a lower limit on the leptoquark mass of 111 GeV/c$^{2}$ for $\beta = 1 $ and 89 GeV/c$^{2}$ for $\beta = 0.5 $ at the 95%\ confidence level.