Events with an isolated lepton and missing transverse momentum and measurement of W production at HERA
- 349 Downloads
A search for events containing an isolated electron or muon and missing transverse momentum produced in e ± p collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994–2007 and correspond to an integrated luminosity of 0.98 fb−1. The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production. In the e + p data, at large hadronic transverse momentum P T X > 25GeV, a total of 23 events are observed compared to a prediction of 14.0 ± 1.9. The total single W boson production cross section is measured as 1.06 ± 0.16 (stat.) ± 0.07 (sys.) pb, in agreement with an Standard Model (SM) expectation of 1.26 ± 0.19 pb.
- ZEUS collaboration, U. Holm, The ZEUS Detector, status report, unpublished, DESY (1993), available at http://www-zeus.desy.de/bluebook/bluebook.html.
- F. Jacquet and A. Blondel, Detectors for charged current events, proceedings of Study of an ep Facility for Europe, U. Amaldi ed., DESY (1979).Google Scholar
Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.