APS » Phys. Rev. C » Volume 77 » Issue 5

M. G. Catanesi,¹ E. Radicioni,¹ R. Edgecock,² M. Ellis,² F. J. P. Soler,² C. Gößling,³ S. Bunyatov,⁴ A. Krasnoperov,⁴ B. Popov,⁴ V. Serdiouk,⁴ V. Tereschenko,⁴ E. Di Capua,⁵ G. Vidal-Sitjes,⁵ A. Artamonov,⁶ S. Giani,⁶ S. Gilardoni,⁶ P. Gorbunov,⁶ A. Grant,⁶ A. Grossheim,⁶ A. Ivanchenko,⁶ V. Ivanchenko,⁶ A. Kayis-Topaksu,⁶ J. Panman,⁶ I. Papadopoulos,⁶ E. Tcherniaev,⁶ I. Tsukerman,⁶ R. Veenhof,⁶ C. Wiebusch,⁶ P. Zucchelli,⁶ A. Blondel,⁷ S. Borghi,⁷ M. C. Morone,⁷ G. Prior,⁷ R. Schroeter,⁷ C. Meurer,⁸ U. Gastaldi,⁹ G. B. Mills,¹⁰ J. S. Graulich,¹¹ G. Grégoire,¹¹ M. Bonesini,¹² F. Ferri,¹² M. Kirsanov,¹³ A. Bagulya,¹⁴ V. Grichine,¹⁴ N. Polukhina,¹⁴ V. Palladino,¹⁵ L. Coney,¹⁶ D. Schmitz,¹⁶ G. Barr,¹⁷ A. De Santo,¹⁷ F. Bobisut,¹⁸ D. Gibin,¹⁸ A. Guglielmi,¹⁸ M. Mezzetto,¹⁸ J. Dumarchez,¹⁹ U. Dore,²⁰ D. Orestano,²¹ F. Pastore,²¹ A. Tonazzo,²¹ L. Tortora,²¹ C. Booth,²² L. Howlett,²² G. Skoro,²² M. Bogomilov,²³ M. Chizhov,²³ D. Kolev,²³ R. Tsenov,²³ S. Piperov,²⁴ P. Temnikov,²⁴ M. Apollonio,²⁵ P. Chimenti,²⁵ G. Giannini,²⁵ J. Burguet-Castell,²⁶ A. Cervera-Villanueva,²⁶ J. J. Gómez-Cadenas,²⁶ J. Martín-Albo,²⁶ P. Novella,²⁶ M. Sorel,²⁶ and A. Tornero²⁶

(HARP Collaboration)

¹Sezione INFN, Bari, Italy
²Rutherford Appleton Laboratory, Chilton, Didcot, United Kingdom
³Institut für Physik, Universität Dortmund, Dortmund, Germany
⁴Joint Institute for Nuclear Research, JINR Dubna, Russia
⁵Università degli Studi e Sezione INFN, Ferrara, Italy
⁶CERN, Geneva, Switzerland
⁷Section de Physique, Université de Genève, Genève, Switzerland
⁸Institut für Physik, Forschungszentrum Karlsruhe, Karlsruhe, Germany
⁹Laboratori Nazionali di Legnaro dell' INFN, Legnaro, Italy
¹⁰Los Alamos National Laboratory, Los Alamos, New Mexico, USA
¹¹Institut de Physique Nucléaire, UCL, Louvain-la-Neuve, Belgium
¹²Sezione INFN Milano Bicocca, Milano, Italy
¹³Institute for Nuclear Research, Moscow, Russia
¹⁴P. N. Lebedev Institute of Physics (FIAN), Russian Academy of Sciences, Moscow, Russia
¹⁵Università “Federico II” e Sezione INFN, Napoli, Italy
¹⁶Columbia University, New York, USA
¹⁷Nuclear and Astrophysics Laboratory, University of Oxford, Oxford, United Kingdom
¹⁸Università degli Studi e Sezione INFN, Padova, Italy
¹⁹LPNHE, Universités de Paris VI et VII, Paris, France
²⁰Università “La Sapienza” e Sezione INFN Roma I, Roma, Italy
²¹Università degli Studi e Sezione INFN Roma Tre, Roma, Italy
²²Department of Physics, University of Sheffield, Sheffield, United Kingdom
²³Faculty of Physics, St. Kliment Ohridski University, Sofia, Bulgaria
²⁴Institute for Nuclear Research and Nuclear Energy, Academy of Sciences, Sofia, Bulgaria
²⁵Università degli Studi e Sezione INFN, Trieste, Italy
²⁶Instituto de Física Corpuscular, IFIC, CSIC and Universidad de Valencia, Valencia, Spain

Measurements of the double-differential ^± production cross section in the momentum range 100p800 MeV/c and angle range 0.352.15 rad in proton-beryllium, proton-carbon, proton-aluminium, proton-copper, proton-tin, proton-tantalum, and proton-lead collisions are presented. The data were taken with the large-acceptance HARP detector in the T9 beam line of the CERN PS. The pions were produced by proton beams in a momentum range from 3 to 12.9 GeV/c hitting a target with a thickness of 5% of a nuclear interaction length. Tracking and identification of the produced particles was performed by 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 d²/(dpd) at six incident proton beam momenta [3, 5, 8, and 8.9 GeV/c (Be only) and 12 and 12.9 GeV/c (Al only)]. They are based on a complete correction of static and dynamic distortions of tracks in the HARP TPC, which allows the complete statistics of the collected data set to be used. The results include and supersede our previously published results and are compatible with these. Results are compared with the GEANT4 and MARS Monte Carlo simulation.

©2008 The American Physical Society

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