Search for contact interactions in deep inelastic \(e^+p\to e^+X\) scattering at HERA

  • The ZEUS Collaboration
  • J. Breitweg et al.
Experimental physics


In a search for signatures of physics processes beyond the Standard Model, various eeqq vector contact–interaction hypotheses have been tested using the high–\(Q^2\) deep inelastic neutral–current \(e^+p\) scattering data collected with the ZEUS detector at HERA. The data correspond to an integrated luminosity of \(47.7\,{\rm pb}^{-1}\) of \(e^+p\) interactions at 300 GeV center–of–mass energy. No significant evidence of a contact–interaction signal has been found. Limits at the 95% confidence level are set on the contact–interaction amplitudes. The effective mass scales \(\Lambda\) corresponding to these limits range from 1.7 TeV to 5 TeV for the contact–interaction scenarios considered.


Interaction Signal Confidence Level Physic Process Effective Mass Mass Scale 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • The ZEUS Collaboration
  • J. Breitweg et al.
    • 1
  1. 1.Argonne National Laboratory, Argonne, IL, USAUS

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