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
Recommended Citation
Chekanov, S.; Derrick, M.; Krakauer, D.; Loizides, J. H.; Magill, S.; Miglioranzi, S.; Musgrave, B.; Repond, J.; Yoshida, R.; Mattingly, Margarita C. K.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cara Romeo, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; De Pasquale, S.; Giusti, P.; Iacobucci, G.; Margotti, A.; Montanari, A.; Nania, R.; Palmonari, F.; Pesci, A.; and Sartorelli, G., "Search for QCD-instanton Induced Events in Eeep Inelastic ep Scattering at HERA" (2004). Faculty Publications. 2066.
https://digitalcommons.andrews.edu/pubs/2066
Acknowledgements
Open access article retrieved March 18, 2021 from https://link.springer.com/content/pdf/10.1140/epjc/s2004-01735-3.pdf