Search for second generation leptoquarks in the dimuon plus dijet channel of p-pbar collisions at sqrt{s}=1.8 TeV

TL;DR

This paper reports a search for second generation leptoquarks in proton-antiproton collisions, setting mass limits based on observed data and theoretical calculations, thus constraining new physics beyond the Standard Model.

Contribution

It provides the first experimental mass limits on second generation scalar leptoquarks using collider data and NLO QCD calculations.

Findings

Lower mass limit of 202 GeV/c^2 for beta=1

Lower mass limit of 160 GeV/c^2 for beta=0.5

Set upper limits on production cross section

Abstract

We report on a search for second generation leptoquarks (Phi_2) using a data sample corresponding to an integrated luminosity of 110 pb^{-1} collected at the Collider Detector at Fermilab. We present upper limits on the production cross section as a function of Phi_2 mass, assuming that the leptoquarks are produced in pairs and decay into a muon and a quark with branching ratio beta. Using a Next-to-Leading order QCD calculation, we extract a lower mass limit of M_{\Phi_2} > 202 (160) GeV$/c^{2} at 95% confidence level for scalar leptoquarks with beta=1(0.5).