Abstract.
A search for events with an imbalance in transverse momentum and with isolated high energy leptons has been carried out at the positron-proton collider HERA. One event with an \(e^-\) and five events with a \(\mu^{\pm}\) are found together with evidence for undetected particles carrying transverse momentum. Within the Standard Model the dominant origin of events with this kind of topology is the production of W bosons with subsequent leptonic decay. Three of the six events are within measurement errors found in a region of phase space likely to be populated by this process, while the remaining events show kinematic properties which are atypical of all Standard Model processes considered.
Similar content being viewed by others
Author information
Authors and Affiliations
Consortia
Additional information
Received: 9 June 1998 / Published online: 26 August 1998
Rights and permissions
About this article
Cite this article
H1 Collaboration., Adloff et al., C. Observation of events with an isolated high energy lepton and missing transverse momentum at HERA. Eur. Phys. J. C 5, 575–584 (1998). https://doi.org/10.1007/s100529800973
Issue Date:
DOI: https://doi.org/10.1007/s100529800973