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arXiv · hep-ex/0610041

Events with isolated leptons and missing transverse momentum at HERA

Cristinel Diaconu·CPP Marseille·DESY
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Abstract

Events with isolated leptons and missing transverse momentum are searched for in electron- or positron-proton collisions at HERA by the H1 and ZEUS experiments. Such events may be explained within the Standard Model by W boson production, followed by leptonic decay. The analysis performed including HERA I and the recently collected data at HERA II results in clear evidence of W production. However, H1 collaboration observes an excess of events in e^+p collisions, not supported so far by ZEUS. If the difference between the H1 and ZEUS observations is attributed to a statistical fluctuation, the combined result exceeds the Standard Model prediction at $2.6σ$ level. A search for events with tau leptons and missing transverse momentum is also presented.

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Cristinel Diaconu, CPP Marseille, DESY. 2006-10-16. Events with isolated leptons and missing transverse momentum at HERA. https://arxiv.org/abs/hep-ex/0610041

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