Large-angle production of charged pions by 3-12.9?GeV/c protons on beryllium, aluminium and lead targets |
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| Institution: | (1) Università degli Studi e Sezione INFN, Bari, Italy;(2) Rutherford Appleton Laboratory, Chilton, Didcot, UK;(3) Institut für Physik, Universit?t Dortmund, Dortmund, Germany;(4) Joint Institute for Nuclear Research, JINR Dubna, Dubna, Russia;(5) Università degli Studi e Sezione INFN, Ferrara, Italy;(6) CERN, Geneva, Switzerland;(7) Section de Physique, Université de Genève, Genève, Switzerland;(8) Institut für Physik, Forschungszentrum Karlsruhe, Karlsruhe, Germany;(9) Laboratori Nazionali di Legnaro dell’ INFN, Legnaro, Italy;(10) Los Alamos National Laboratory, Los Alamos, USA;(11) Institut de Physique Nucléaire, UCL, Louvain-la-Neuve, Belgium;(12) Università degli Studi e Sezione INFN Milano Bicocca, Piazza Scienza 3, 20126 Milano, Italy;(13) Institute for Nuclear Research, Moscow, Russia;(14) P.N. Lebedev Institute of Physics (FIAN), Russian Academy of Sciences, Moscow, Russia;(15) Università “Federico II” e Sezione INFN, Napoli, Italy;(16) Columbia University, New York, USA;(17) Nuclear and Astrophysics Laboratory, University of Oxford, Oxford, UK;(18) Università degli Studi e Sezione INFN, Padova, Italy;(19) LPNHE, Universités de Paris VI et VII, Paris, France;(20) Università “La Sapienza” e Sezione INFN Roma I, Roma, Italy;(21) Università degli Studi e Sezione INFN Roma III, Roma, Italy;(22) Dept. of Physics, University of Sheffield, Sheffield, UK;(23) Faculty of Physics, St. Kliment Ohridski University, Sofia, Bulgaria;(24) Institute for Nuclear Research and Nuclear Energy, Academy of Sciences, Sofia, Bulgaria;(25) Università degli Studi e Sezione INFN, Trieste, Italy;(26) Instituto de Física Corpuscular, IFIC, CSIC and Universidad de Valencia, Valencia, Spain |
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| Abstract: | Measurements of the double-differential π± production cross-section in the range of momentum 100 MeV/c≤p< 800 MeV/c and angle 0.35 rad ≤θ< 2.15 rad in proton–beryllium,
proton–aluminium and proton–lead collisions are presented. The data were taken with the HARP detector in the T9 beam line
of the CERN PS. The pions were produced by proton beams in a momentum range from 3 GeV/c to 12.9 GeV/c hitting a target with
a thickness of 5% of a nuclear interaction length. The tracking and identification of the produced particles was performed
using a small-radius cylindrical time projection chamber (TPC) placed inside a solenoidal magnet. Incident particles were
identified by an elaborate system of beam detectors. Results are obtained for the double-differential cross-sections d2σ/dpdθ at six incident proton beam momenta (3 GeV/c, 5 GeV/c, 8 GeV/c, 8.9 GeV/c (Be only), 12 GeV/c and 12.9 GeV/c (Al only))
and compared to previously available data. |
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