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Measurement of inclusive π0 production in the charged-current interactions of neutrinos in a 1.3-GeV wide band beam

C. Mariani23,†, A. Tornero-Lopez31, J. L. Alcaraz1, S. Andringa1, S. Aoki14, Y. Aoyama14, J. Argyriades5, K. Asakura14, R. Ashie28 et al. (The K2K Collaboration)

R. Ashie28, F. Berghaus3, H. Berns32, H. Bhang24, A. Blondel9, S. Borghi9,‡, J. Bouchez5,*, J. Burguet-Castell31, D. Casper4, J. Catala31, C. Cavata5, A. Cervera9,§, S. M. Chen30, K. O. Cho6, J. H. Choi6, U. Dore23, X. Espinal1, M. Fechner5, E. Fernandez1, Y. Fujii11, Y. Fukuda19, J. Gomez-Cadenas31, R. Gran32, T. Hara14, M. Hasegawa16,∥, T. Hasegawa11, Y. Hayato28, R. L. Helmer30, K. Hiraide16,¶, J. Hosaka28, A. K. Ichikawa16, M. Iinuma12, A. Ikeda21, T. Ishida11, K. Ishihara28, T. Ishii11, M. Ishitsuka29, Y. Itow28, T. Iwashita11, H. I. Jang6, E. J. Jeon24, I. S. Jeong6, K. K. Joo24, G. Jover Manas1, C. K. Jung26, T. Kajita29, J. Kameda28, K. Kaneyuki29, I. Kato30, E. Kearns2, C. O. Kim15, M. Khabibullin13, A. Khotjantsev13, D. Kielczewska33,25, J. Y. Kim6, S. B. Kim24, P. Kitching30, K. Kobayashi26, T. Kobayashi11, A. Konaka30, Y. Koshio28, W. Kropp4, Yu. Kudenko13, Y. Kuno22, Y. Kurimoto16,∥, T. Kutter17,3, J. Learned10, S. Likhoded2, I. T. Lim6, P. F. Loverre23, L. Ludovici23, H. Maesaka16,**, J. Mallet5, S. Matsuno10, V. Matveev13, K. McConnel Mahn18,††, C. McGrew26, S. Mikheyev13, A. Minamino28, S. Mine4, O. Mineev13, C. Mitsuda28, M. Miura28, Y. Moriguchi14, S. Moriyama28, T. Nakadaira11, M. Nakahata28, K. Nakamura11, I. Nakano21, T. Nakaya16, S. Nakayama29, T. Namba28, R. Nambu28, S. Nawang12, K. Nishikawa11, K. Nitta16,‡‡, F. Nova1, P. Novella31, Y. Obayashi28, A. Okada29, K. Okumura29, S. M. Oser3, Y. Oyama11, M. Y. Pac7, F. Pierre5,*, A. Rodriguez1, C. Saji29, M. Sakuda21, F. Sanchez1, K. Scholberg8, R. Schroeter9, M. Sekiguchi14, M. Shiozawa28, K. Shiraishi32, G. Sitjes31, M. Smy4, H. Sobel4, M. Sorel31, J. Stone2, L. Sulak2, A. Suzuki14, Y. Suzuki28, M. Tada11, T. Takahashi12, Y. Takenaga29, Y. Takeuchi28, K. Taki28, Y. Takubo22, N. Tamura20, M. Tanaka11, R. Terri26, S. T’Jampens5, Y. Totsuka11, M. Vagins4, C. W. Walter8, W. Wang2, R. J. Wilkes32, L. Whitehead26, S. Yamada28, Y. Yamada11, S. Yamamoto16,§§, C. Yanagisawa26, N. Yershov13, H. Yokoyama27, M. Yokoyama16, J. Yoo24, M. Yoshida22, and J. Zalipska25 (The K2K Collaboration)

  • 1Institut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain
  • 2Department of Physics, Boston University, Boston, Massachusetts 02215, USA
  • 3Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
  • 4Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA
  • 5Commissariat a l’Energie Atomique et aux Energies Alternatives, Centre de Saclay, IRFU/SPP, 91191 Gif-sur-Yvette, France
  • 6Department of Physics, Chonnam National University, Kwangju 500-757, Korea
  • 7Department of Physics, Dongshin University, Naju 520-714, Korea
  • 8Department of Physics, Duke University, Durham, North Carolina 27708, USA
  • 9DPNC, Section de Physique, University of Geneva, CH1211, Geneva 4, Switzerland
  • 10Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
  • 11High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • 12Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8530, Japan
  • 13Institute for Nuclear Research, Moscow 117312, Russia
  • 14Kobe University, Kobe, Hyogo 657-8501, Japan
  • 15Department of Physics, Korea University, Seoul 136-701, Korea
  • 16Department of Physics, Kyoto University, Kyoto 606-8502, Japan
  • 17Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA
  • 18Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 19Department of Physics, Miyagi University of Education, Sendai 980-0845, Japan
  • 20Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
  • 21Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
  • 22Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • 23University of Rome Sapienza and INFN, I-00185 Rome, Italy
  • 24Department of Physics, Seoul National University, Seoul 151-747, Korea
  • 25A. Soltan Institute for Nuclear Studies, 00-681 Warsaw, Poland
  • 26Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
  • 27Department of Physics, Tokyo University of Science, Noda, Chiba 278-0022, Japan
  • 28Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan
  • 29Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
  • 30TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
  • 31Instituto de Física Corpuscular, E-46071 Valencia, Spain
  • 32Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
  • 33Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland

  • *Deceased.
  • †Present Address: Department of Physics, Columbia University, New York, NY 10027, USA.
  • ‡Present Address: School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • §Present Address: Instituto de Fisica Corpuscular, Universidad de Valencia, Valencia, Spain.
  • ∥Present Address: High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Present Address: Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan.
  • **Present Address: XFEL Project Head Office, RIKEN, Sayo, Hyogo 671-5148, Japan.
  • ††Present Address: TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
  • ‡‡Present Address: National Institute of Radiological Sciences (NIRS), Chiba-shi 263-8555, Japan.
  • §§Present Address: The University of Tokyo, International Center for Elementary Particle Physics, Hongo, Tokyo 113-0033, Japan.
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Phys. Rev. D 83, 054023 – Published 16 March, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.054023

Abstract

In this paper, we report on the measurement of the rate of inclusive π0 production induced by charged-current neutrino interactions in a C8H8 target at a mean energy of 1.3 GeV in the K2K near detector. Out of a sample of 11 606 charged-current neutrino interactions, we select 479 π0 events with two reconstructed photons. We find that the cross section for the inclusive π0 production relative to the charged-current quasielastic cross section is σCCπ0σCCQE=0.426±0.032 (stat)±0.035 (syst). The energy-dependent cross section ratio is also measured. The results are consistent with previous experiments for exclusive channels on different targets.

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Phys. Rev. D 83, 054023– Published 16 March, 2011
  • Received 8 December 2010
Article part of CHORUS

© 2011 American Physical Society

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