Zeitschrift für Physik A Hadrons and Nuclei

, Volume 342, Issue 2, pp 215–221 | Cite as

Proton production bias in neutrino-hydrogen interactions

  • W. Melnitchouk
  • A. W. Thomas
  • N. N. Nikolaev
Hadron Physics


Recent bubble chamber experiments have produced what at first appeared to be a curious dependence of (anti) neutrino-nucleus and (anti)neutrino-proton semiinclusive structure functions on the number of slow protons present at the interaction vertex. Some authors have suggested that this effect is in fact related to the EMC effect. We show, however, that the difference between the differential cross sections for events with slow protons (stubs) and for those without can be attributed to the fragmentation bias inherent to deep inelastic scattering. For the ratio of normalizedx-distributions for stub-containing to stub-free events we find quantitative agreement between our model and the data for the small-x region (x <0.25), and can reproduce the larger-x data after making corrections for possible uncertainties associated with the determination of final state hadron momenta. Our results also agree very well with the total fraction of proton-containing events with momentum below 350 and 600 MeV. We also examine a model for the target fragmentation into protons in which we consider the extreme case where the nucleon sea is dominated by pions.


13.87.Fh 13.87.Ce 13.15.Dk 


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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • W. Melnitchouk
    • 1
  • A. W. Thomas
    • 1
  • N. N. Nikolaev
    • 2
    • 3
    • 4
  1. 1.Department of Physics and Mathematical PhysicsUniversity of AdelaideAdelaideAustralia
  2. 2.European Branch of L.D. Landau Institute at ISI FoundationTorinoItaly
  3. 3.Dipartmento di Fisica TeoricaUniversitá di TorinoItaly
  4. 4.Instituto Nazionale di Fisica Nucleare, Sezione di TorinoTorinoItaly

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