# Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of {\boldmath $W$} Production at HERA

Abstract : A search for events containing an isolated electron or muon and missing transverse momentum produced in $e^{\pm}p$ 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 $P_{T}^{X}>25$ 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 $1.06 \pm 0.16 ({\rm stat.}) \pm 0.07 ({\rm sys.})$ pb, in agreement with an SM expectation of $1.26 \pm 0.19$ pb.
Document type :
Journal articles

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Submitted on : Monday, November 9, 2009 - 3:37:29 PM
Last modification on : Wednesday, April 7, 2021 - 3:26:01 PM

### Citation

F.D. Aaron, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, et al.. Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of {\boldmath $W$} Production at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2009, 64, pp.251-271. ⟨10.1140/epjc/s10052-009-1160-6⟩. ⟨in2p3-00430701⟩

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