Home > Publications database > Search for QCD Instanton-Induced Processes at HERA in the High-$\it Q^{2}$ Domain
 
Preprint/Report PUBDB-2016-02168
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Search for QCD Instanton-Induced Processes at HERA in the High-$\it Q^{2}$ Domain

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Report No.: DESY-16-050; arXiv:1603.05567

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 $150 < Q^2 < 15000$ GeV$^2$. 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 $1.5$~pb 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 theory predictions.

Classification:
Contributing Institute(s):
  1. H1 Kollaboration (H1)
Research Program(s):
  1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
Experiment(s):
  1. HERA: H1
Database coverage:
OpenAccess ; Published
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Search for QCD instanton-induced processes at HERA in the high-$Q^2$ Domain
The European physical journal / C 76, 381 () [10.1140/epjc/s10052-016-4194-6]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

 Record created 2016-06-08, last modified 2021-11-10
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