Authors

Document Type

Article

Publication Date

5-1-2004

Abstract

A search for QCD-instanton-induced events in deep inelastic ep scattering has been performed with the ZEUS detector at the HERA collider, using data corresponding to an integrated luminosity of 38 pb-1. A kinematic range defined by cuts on the photon virtuality, Q2 > 120 GeV 2, and on the Bjorken scaling variable, x > 10-3, has been investigated. The QCD-instanton induced events were modelled by the Monte Carlo generator QCDINS. A background-independent, conservative 95% confidence level upper limit for the instanton cross section of 26 pb is obtained, to be compared with the theoretically expected value of 8.9pb.

Journal Title

European Physical Journal C

Volume

34

Issue

3

First Page

255

Last Page

265

DOI

https://doi.org/10.1140/epjc/s2004-01735-3

First Department

Physics

Acknowledgements

Open access article retrieved March 18, 2021 from https://link.springer.com/content/pdf/10.1140/epjc/s2004-01735-3.pdf

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