Search for Second Generation Leptoquark Pairs Decaying to \mu\nu + jets in p-pbar Collisions at sqrt{s} = 1.8 TeV

TL;DR

This paper reports a search for second generation leptoquark pairs in proton-antiproton collisions at 1.8 TeV, setting mass limits for scalar and vector leptoquarks based on their decay channels to muons, neutrinos, and jets.

Contribution

It provides the first experimental mass limits for second generation scalar and vector leptoquarks at Tevatron energies, based on collision data from the D0 detector.

Findings

Scalar leptoquarks with mass below 160 GeV/c^2 are excluded.

Vector leptoquarks with minimal couplings below 240 GeV/c^2 are excluded.

Yang-Mills vector leptoquarks below 290 GeV/c^2 are excluded.

Abstract

We report on a search for second generation leptoquarks (LQ) produced in $p\bar{p}$ collisions at sqrt{s} = 1.8 TeV using the D0 detector at Fermilab. Second generation leptoquarks are assumed to be produced in pairs and to decay to either \mu or \nu and either a strange or a charm quark (q). Limits are placed on \sigma(p-pbar -> LQ-LQbar -> \mu\nu + jets) as a function of the mass of the leptoquark. For equal branching ratios to \mu q and \nu q, second generation scalar leptoquarks with a mass below 160 GeV/c^2, vector leptoquarks with anomalous minimal vector couplings with a mass below 240 GeV/c^2, and vector leptoquarks with Yang-Mills couplings with a mass below 290 GeV/c^2, are excluded at the 95% confidence level.