Scientific article
Open access

Measurement of the production cross section of 31 GeV/c protons on carbon via beam attenuation in a 90-cm-long target

ContributorsNA61/SHINE Collaboration
Published inPhysical review. D, vol. 103, no. 1, 012006
Publication date2021
First online date2021-01-12

The production cross section of 30.92  GeV/c protons on carbon is measured by the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron by means of beam attenuation in a copy (replica) of the 90-cm-long target of the T2K neutrino oscillation experiment. The employed method for direct production cross-section estimation minimizes model corrections for elastic and quasielastic interactions. The obtained production cross section is σprod=227.6±0.8(stat)-3.2+1.9(sys)−0.8(mod)  mb. It is in agreement with previous NA61/SHINE results obtained with a thin carbon target, while providing improved precision with a total fractional uncertainty of less than 2%. This direct measurement will reduce the uncertainty of the T2K neutrino flux prediction.

  • Particle Physics Experiments
  • Carbon: target
  • Neutrino: oscillation
  • Neutrino: flux
  • Attenuation
  • J-PARC Lab
  • NA61
  • Direct production
  • Spectrometer
  • Fractional
  • Hadron
  • Data analysis method
  • Channel cross section: measured
  • Experimental results
  • 31 GeV/c
  • European Commission - European network for developing new horizons for RIs [871072]
Citation (ISO format)
NA61/SHINE Collaboration. Measurement of the production cross section of 31 GeV/<i>c</i> protons on carbon via beam attenuation in a 90-cm-long target. In: Physical review. D, 2021, vol. 103, n° 1, p. 012006. doi: 10.1103/physrevd.103.012006
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Article (Published version)
ISSN of the journal2470-0010

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