Measurement of neutral and charged current cross-sections in positron-proton collisions at large momentum transfer

  • The H1 Collaboration
  • C. Adloff et al.
Experimental physics


The inclusive single and double differential cross-sections for neutral and charged current processes with four-momentum transfer squared \(Q^2\) between 150 and 30 000 GeV\(^2\) and with Bjorken x between 0.0032 and 0.65 are measured in \(e^+ p\) collisions. The data were taken with the H1 detector at HERA between 1994 and 1997, and they correspond to an integrated luminosity of \(35.6\,{\rm pb}^{-1}\). The \(Q^2\) evolution of the parton densities of the proton is tested, yielding no significant deviation from the prediction of perturbative QCD. The proton structure function \(F_2(x,Q^2)\) is determined. An extraction of the u and d quark distributions at high x is presented. At high \(Q^2\) electroweak effects of the heavy bosons \(Z^\circ\) and \(W\) are observed and found to be consistent with Standard Model expectation.


Structure Function Momentum Transfer Current Process Large Momentum Parton Density 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • The H1 Collaboration
  • C. Adloff et al.
    • 1
  1. 1.Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany DE

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