An unexpected excess of events with high 2 reported by the H1 and ZEUS collaborations at HERA in early 1997 provoked speculation that the production of first-generation leptoquarks had been observed. In this article we review the anomalous HERA events, give a brief summary of the motivation for leptoquarks, and discuss the most recent searches at HERA and the Tevatron for first-, second-, and third-generation leptoquarks as well as generation-changing leptoquarks. We conclude with a short discussion of future prospects for leptoquark searches.


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  • Article Type: Review Article
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