Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA

Details Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA

2009-11-04

arxiv.org/abs/0911.0858v2

JHEP 1003:035,2010

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 3 figures, v2 updated to correspond to Journal version

Scientific paper

10.1007/JHEP03(2010)035

A search for events containing an isolated electron or muon and missing transverse momentum produced in ep 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 PtX >25 GeV, a total of 23 events are observed compared to a prediction of 14.0 \pm 1.9. The total single W boson production cross section is measured as 1.06 \pm 0.16 (stat.) \pm 0.07 (sys) pb, in agreement with an SM expectation of 1.26 \pm 0.19 pb.

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