Search for Leptoquark Pairs Decaying to neutrino neutrino + jets in p anti-p Collisions at s**(1/2)=1.8 TeV

TL;DR

This study searches for pair-produced leptoquarks decaying into neutrinos and jets in proton-antiproton collisions at 1.8 TeV, setting mass limits and finding no evidence of their existence within the analyzed data.

Contribution

First search for leptoquark pairs decaying to neutrinos and jets at Tevatron, establishing new mass exclusion limits for scalar and vector leptoquarks.

Findings

No evidence for leptoquark production was observed.

Scalar leptoquarks with mass below 98 GeV/c^2 are excluded.

Vector leptoquarks with mass below 200 GeV/c^2 are excluded.

Abstract

We present the results of a search for leptoquark (LQ) pairs in (85.2 +- 3.7) pb^{-1} of p anti-p collider data collected by the D0 experiment at the Fermilab Tevatron. We observe no evidence for leptoquark production and set a limit on sigma(p anti-p -> LQ anti-LQ -> neutrino neutrino + jets) as a function of the mass of the leptoquark (m_{LQ}). Assuming the decay LQ -> neutrino q, we exclude scalar leptoquarks for m_{LQ} < 98 GeV/c^2, and vector leptoquarks for m_{LQ} < 200 GeV/c^2 and coupling which produces the minimum cross section, at a 95% confidence level.