W Production and the Search for Events with an Isolated High-Energy Lepton and Missing Transverse Momentum at HERA

Abstract

A search for the leptonic decays of W bosons produced in the reaction e^+ p\to e^+ W^\pm X at a centre-of-mass energy of 300 GeV has been performed with the ZEUS detector at HERA using an integrated luminosity of 47.7 pb^-1 . Three events consistent with W\to eνdecay are found, giving a cross section of 0.9 +1.0 -0.7 \pm 0.2 pb, in good agreement with the Standard Model prediction. The corresponding 95% C.L. upper limit on the cross section is 3.3 pb. A search for the decay W\to μνhas a smaller selection efficiency and yields no candidate events. Limits on the cross section for W production with large hadronic transverse momentum have been obtained. A search for high-transverse-momentum isolated tracks in events with large missing transverse momentum yields results in good agreement with Standard Model expectations, in contrast to a recent report by the H1 collaboration of the observation of an excess of such events.

17 pages including 7 figures and 2 tables, final version for Phys.Lett

References in corpus (6)

• LEPTO 6.5 - A Monte Carlo Generator for Deep Inelastic Lepton-Nucleon Scattering
• Pinning down the Glue in the Proton
• Neural Network based Electron Identification in the ZEUS Calorimeter
• Limits on Anomalous $WW\gamma$ Couplings from $p\bar{p}\to W\gamma +X$ Events at $\sqrt{s}=1.8$ TeV
• Observation of Events with an Isolated High Energy Lepton and Missing Transverse Momentum at HERA
• Anomalous W boson production at HERA

Cited by in corpus (18)

• Search for single-top production in ep collisions at HERA
• Search for single-top production in ep collisions at HERA
• Isolated electrons and muons in events with missing transverse momentum at HERA
• Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA
• Neutrino oscillation experiments and limits on lepton-number and lepton-flavor violating processes
• High-mass dijet cross sections in photoproduction at HERA
• Events with Isolated Leptons and Missing Transverse Momentum and Measurement of W Production at HERA
• Search for events with an isolated lepton and missing transverse momentum and a measurement of W production at HERA
• Tau Lepton Production in ep Collisions at HERA
• Isolated tau leptons in events with large missing transverse momentum at HERA
• Review of Searches for Rare Processes and Physics Beyond the Standard Model at HERA
• Signatures of heavy Majorana neutrinos and HERA's isolated lepton events
• Events with Isolated Charged Leptons and Large Missing Transverse Momentum at HERA
• Electroweak and beyond the Standard Model results from HERA
• HERA signature-based searches I: events with isolated leptons and missing transverse momentum at HERA
• Isolated Lepton Production at Colliders
• Isolated Leptons and Missing P_{T} at HERA
• Single W and Anomalous Single Top Production at HERA