Search for QCD instanton-induced processes at HERA in the high-Q2 domain

Henderson, Robert Charles William (2016) Search for QCD instanton-induced processes at HERA in the high-Q2 domain. European Physical Journal C: Particles and Fields, 76 (7). ISSN 1434-6044

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Abstract

Signals of QCD instanton-induced processes are searched for in neutral current deep-inelastic scattering at the electron-proton collider HERA in the kinematic region defined by the Bjorken-scaling variable x>10−3, the inelasticity 0.2<y<0.7 and the photon virtuality 150<Q2<15000 GeV2. The search is performed using H1 data corresponding to an integrated luminosity of 351 pb−1. No evidence for the production of QCD instanton-induced events is observed. Upper limits on the cross section for instanton-induced processes between 1.5 and 6 pb, at 95% confidence level, are obtained depending on the kinematic domain in which instantons could be produced. Compared to earlier publications, the limits are improved by an order of magnitude and for the first time are challenging predictions.

Item Type: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 80738
Deposited By: ep_importer_pure
Deposited On: 05 Aug 2016 10:36
Refereed?: Yes
Published?: Published
Last Modified: 15 Oct 2019 03:48
URI: https://eprints.lancs.ac.uk/id/eprint/80738

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