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Spin alignment and parity violation effects inρ 0 production in neutrino and antineutrino charged-current interactions

  • Experimental Physics
  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

Most of the measured events on hydrogen, deuterium and neon targets from BEBC at CERN and the 15-foot Bubble Chamber at Fermilab are combined to measure spin-density matrix elements for ρ0 production in the current-fragmentation region in neutrino and antineutrino charged-current interactions. The spin-alignment parameter η is found to be 0.08±0.11 for neutrino and 0.41±0.11 for antineutrino interactions. The parity-odd density matrix element Im(ρ10+ρ−10) is consistent with zero in both reactions. In the combined neutrino and antineutrino data an indication of parity violation is observed: Im ρ1−1=0.38±0.16 atx B >0.2,Q 2>8 GeV2 andz>0.6.

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Author information

Author notes

  1. K. E. Varvell

    Present address: ANSTO, NSW 2234, Menai, Australia

Authors and Affiliations

  1. Institute for High Energy Physics, RU-142284, Protvino, Russia

    V. G. Zaetz, V. V. Ammosov, V. A. Gapienko, G. S. Gapienko & V. A. Korotkov

  2. Max-Planck-Institut für Physik, D-80805, München, Germany

    M. Aderholz, U. F. Katz, N. Schmitz & W. Wittek

  3. Institute of Theoretical and Experimental Physics, RU-117259, Moscow, Russia

    A. E. Asratyan, V. S. Kaftanov, S. P. Krutchinin & M. A. Kubantsev

  4. Institute of Nuclear Physics, PL-30055, Cracow, Poland

    T. Coghen

  5. Dipartimento di Fisica dell'Università e Sezione INFN, I-70126, Bari, Italy

    O. Erriquez

  6. Rutherford Appleton Laboratory, Chilton, OX11 0QX, Didcot, UK

    J. Guy & W. Venus

  7. University of Birmingham, B15 2TT, Birmingham, UK

    G. T. Jones & K. E. Varvell

  8. Inter-University Institute for High Energies, ULB-VUB, B-1050, Brussels, Belgium

    P. Marage

  9. CERN, CH-1211, Geneva 23, Switzerland

    D. R. O. Morrison

Authors
  1. V. G. Zaetz
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  2. M. Aderholz
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  4. A. E. Asratyan
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  5. T. Coghen
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  6. O. Erriquez
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  7. V. A. Gapienko
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  8. G. S. Gapienko
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  9. J. Guy
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  10. G. T. Jones
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  11. V. S. Kaftanov
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  12. U. F. Katz
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  13. V. A. Korotkov
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  14. S. P. Krutchinin
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  15. M. A. Kubantsev
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  16. P. Marage
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  17. D. R. O. Morrison
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  18. N. Schmitz
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  19. K. E. Varvell
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  21. W. Wittek
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Big Bubble Chamber Neutrino Collaboration

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Big Bubble Chamber Neutrino Collaboration., Zaetz, V.G., Aderholz, M. et al. Spin alignment and parity violation effects inρ 0 production in neutrino and antineutrino charged-current interactions. Z. Phys. C - Particles and Fields 66, 583–590 (1995). https://doi.org/10.1007/BF01579632

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  • DOI: https://doi.org/10.1007/BF01579632

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