Isolated tau leptons in events with large missing transverse momentum at HERA
(2004) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B583, p. 41-58 (2004)
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- Abstract
- (en) A search for events containing isolated tau leptons and large missing transverse momentum, not originating from the tau decay, has been performed with the ZEUS detector at the electron-proton collider HERA, using 130 pb^-1 of integrated luminosity. A search was made for isolated tracks coming from hadronic tau decays. Observables based on the internal jet structure were exploited to discriminate between tau decays and quark- or gluon-induced jets. Three tau candidates were found, while 0.40 +0.12 -0.13 were expected from Standard Model processes, such as charged current deep inelastic scattering and single W-boson production. To search for heavy-particle decays, a more restrictive selection was applied to isolate tau leptons produced together with a hadronic final state with high transverse momentum. Two candidate events survive, while 0.20 +-0.05 events are expected from Standard Model processes. Comment: 28 pages, 4 figures, 3 tables, accepted by Phys. Lett. B. Updated with minor changes to the text requested by the journal referee
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Chekanov, S., Piotrzkowski, K., & et al. (2004). Isolated tau leptons in events with large missing transverse momentum at HERA. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B583, 41-58. https://doi.org/10.1016/j.physletb.2003.12.054 (Original work published 2004)