Search for Second Generation Leptoquark Pairs Decaying toμν+jetsinpp¯Collisions at√s=1.8TeV

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