| Measurement of the production cross-section of positive pions in the collision of 8.9 GeV/c protons on beryllium (2007) | |||||||||||||||
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| 25 pages, 21 figures.-- ISI Article Identifier: 000249019600003.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ex/0702024. Printed version published in Sep 2007.. The double-differential production cross-section of positive pions, d(2)σ(π+)/dpdΩ, measured in the HARP experiment is presented. The incident particles are 8.9 GeV/c protons directed onto a beryllium target with a thickness of 5% of a nuclear interaction length. The measured cross-section has a direct impact on the prediction of neutrino fluxes for the MiniBooNE and SciBooNE experiments at Fermilab. After cuts, 13 million protons on target produced about 96000 reconstructed secondary tracks which were used in this analysis. Cross-section results are presented in the kinematic range 0.75 GeV/c ≤ p(π) ≤ 6.5 GeV/c and 30 mrad ≤ Θ(π) ≤ 210 mrad in the laboratory frame.. The experiment was made possible by grants from the Institut Interuniversitaire des Sciences Nucléaires and the Interuniversitair Instituut voor Kernwetenschappen (Belgium), Ministerio de Educación y Ciencia, Grant FPA2003-06921-c02-02 and Generalitat Valenciana, grant GV00-054-1, CERN (Geneva, Switzerland), the German Bundesministerium für Bildung und Forschung (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), INR RAS (Moscow) and the Particle Physics and Astronomy Research Council (UK). We gratefully acknowledge their support.. Peer reviewed | |||||||||||||||
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