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Search for anomalous production of di-lepton events with missing transverse momentum in e + e - collisions at \(\sqrt{s} = {}\)183-209 GeV

  • experimental physics
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Abstract.

In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e + e - centre-of-mass energies ranging from 183 GeV to 209 GeV. The number of di-lepton events, the dependence on centre-of-mass energy, and the event properties are consistent with expectations from Standard Model processes, predominantly W + W- production with both W bosons decaying leptonically. This topology is also an experimental signature for the pair production of new particles that decay to a charged lepton accompanied by one or more invisible particles. No evidence for new phenomena is apparent. Upper limits are presented on the production cross-section multiplied by the relevant branching ratio squared for sleptons, leptonically decaying charginos and charged Higgs bosons. Mass limits are also given.

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Received: 14 July 2003, Published online: 9 January 2004

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The OPAL Collaboration. Search for anomalous production of di-lepton events with missing transverse momentum in e + e - collisions at \(\sqrt{s} = {}\)183-209 GeV. Eur. Phys. J. C 32, 453–473 (2004). https://doi.org/10.1140/epjc/s2003-01466-y

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  • DOI: https://doi.org/10.1140/epjc/s2003-01466-y

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