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A study of pontecorvo reactions in antiproton deuterium annihilations at rest

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Il Nuovo Cimento A (1965-1970)

Summary

The results of the analysis of a new data sample of\(\bar p\) annihilations at rest on deuterium and hydrogen, taken at the CERN LEAR by the OBELIX spectrometer, are presented. The\(\bar p\)d → π−p channel has been measured with a noticeable reduction of both the statistical and the systematic errors with respect to the previous OBELIX measurement and the branching ratio turns out to be (1.29±±0.07(stat)±0.05(syst))·10−5, in good agreement with the previous result. The\(\bar p\)d→ρ−p→π−π0p channel has been investigated for the first time and the branching ratio is evaluated to be (2.9±0.4(stat)±0.5(syst))·10−5. Finally, as a check of the spectrometer absolute calibration, the\(\bar p\)p→π+π− channel was also studied with a measured branching ratio of (4.27±0.15(stat)±0.17(syst))·10−3, in good agreement with the ASTERIX result.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research - Dubna, SU-101000, Moscow, Russia

    V. G. Ableev, A. M. Rozhdestvensky & M. G. Sapozhnikov

  2. Politecnico di Torino and INFN, Sezione di Torino, I-10125, Torino

    M. Agnello & B. Minetti

  3. Dipartimento di Fisica dell’Università, Padova

    A. Andrighetto & R. A. Ricci

  4. INFN, Sezione di Padova, I-35100, Padova

    A. Andrighetto & R. A. Ricci

  5. Istituto di Fisica dell’Università, Torino

    F. Balestra, E. Botta, T. Bressani, M. P. Bussa, L. Busso, D. Calvo, P. Cerello, S. Costa, L. Fava, A. Feliciello, L. Ferrero, A. Filippi, R. Garfagnini, A. Grasso, F. Iazzi, A. Maggiora, S. Marcello, M. Morando, D. Panzieri, G. Piragino, E. Rossetto, F. Tosello & G. Zosi

  6. INFN, Sezione di Torino, I-10125, Torino

    F. Balestra, E. Botta, T. Bressani, M. P. Bussa, L. Busso, D. Calvo, P. Cerello, M. Corradini, S. Costa, A. Donzella, L. Fava, A. Feliciello, L. Ferrero, A. Filippi, R. Garfagnini, A. Grasso, F. Iazzi, E. Lodi Rizzini, A. Maggiora, S. Marcello, M. Morando, D. Panzieri, G. Piragino, E. Rossetto, F. Tosello, L. Venturelli & G. Zosi

  7. Dipartimento di Fisica Nucleare e Teorica dell’Università, Pavia

    G. Bendiscioli, V. Filippini, A. Fontana, P. Montagna, A. Rotondi, A. Saino, P. Salvini & V. I. Tretyak

  8. INFN, Sezione di Pavia, I-27100, Pavia

    G. Bendiscioli, A. Donzella, V. Filippini, A. Fontana, P. Montagna, A. Rotondi, A. Saino, P. Salvini, V. I. Tretyak & A. Zenoni

  9. Dipartimento di Fisica dell’Università, Bologna

    A. Bertin, M. Bruschi, B. Cereda, I. D’Antone, S. De Castro, D. Galli, B. Giacobbe, U. Marconi, M. Piccinini, N. Semprini Cesari, R. Spighi, S. Vecchi, M. Villa, A. Vitale & A. Zoccoli

  10. INFN, Sezione di Bologna, I-40100, Bologna

    A. Bertin, M. Bruschi, B. Cereda, I. D’Antone, S. De Castro, D. Galli, B. Giacobbe, U. Marconi, M. Piccinini, M. Poli, N. Semprini Cesari, R. Spighi, S. Vecchi, M. Villa, A. Vitale & A. Zoccoli

  11. Laboratori Nazionali di Legnaro dell’INFN, I-35100, Padova

    C. Cavion, U. Gastaldi, G. Maron & R. A. Ricci

  12. Dipartimento di Scienze Fisiche dell’Università, Cagliari

    C. Cicalò, A. Masoni, G. Puddu, S. Serci, P. Temnikov & G. Usai

  13. INFN, Sezione di Cagliari, I-09100, Cagliari

    C. Cicalò, A. Masoni, G. Puddu, S. Serci, P. Temnikov & G. Usai

  14. Dipartimento di Chimica e Fisica per i Materiali dell’Università, I-25060, Brescia

    M. Corradini, A. Donzella, E. Lodi Rizzini, L. Venturelli & A. Zenoni

  15. Laboratori Nazionali di Frascati dell’INFN, I-00044, Frascati

    P. Gianotti, C. Guaraldo, A. Lanaro, V. Lucherini & F. Nichitiu

  16. Istituto di Fisica dell’Università, Trieste

    G. Pauli & S. Tessaro

  17. INFN, Sezione di Trieste, I-34127, Trieste

    G. Pauli, L. Santi & S. Tessaro

  18. Dipartimento di Energetica dell’Università, I-50100, Firenze

    M. Poli

  19. Dipartimento di Fisica dell’Università, I-33100, Udine

    L. Santi

Authors
  1. V. G. Ableev
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  2. M. Agnello
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  3. A. Andrighetto
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  4. F. Balestra
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  5. G. Bendiscioli
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  6. A. Bertin
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  7. E. Botta
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  8. T. Bressani
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  9. M. Bruschi
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  10. M. P. Bussa
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  11. L. Busso
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  12. D. Calvo
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  13. C. Cavion
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  14. B. Cereda
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  15. P. Cerello
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  16. C. Cicalò
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  17. M. Corradini
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  18. S. Costa
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  19. I. D’Antone
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  20. S. De Castro
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  21. A. Donzella
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  22. L. Fava
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  23. A. Feliciello
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  24. L. Ferrero
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  25. A. Filippi
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  26. V. Filippini
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  27. A. Fontana
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  28. D. Galli
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  32. P. Gianotti
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  33. A. Grasso
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  34. C. Guaraldo
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  35. F. Iazzi
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  36. A. Lanaro
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  37. E. Lodi Rizzini
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  38. V. Lucherini
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  39. A. Maggiora
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  40. S. Marcello
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  41. U. Marconi
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  42. G. Maron
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  43. A. Masoni
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  44. B. Minetti
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  45. P. Montagna
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  46. M. Morando
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  47. F. Nichitiu
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  48. D. Panzieri
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  49. G. Pauli
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  50. M. Piccinini
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  51. G. Piragino
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  52. M. Poli
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  53. G. Puddu
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  54. R. A. Ricci
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  55. E. Rossetto
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  56. A. Rotondi
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  57. A. M. Rozhdestvensky
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  58. A. Saino
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  59. P. Salvini
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  60. L. Santi
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  61. M. G. Sapozhnikov
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  62. N. Semprini Cesari
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  63. S. Serci
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  64. R. Spighi
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  65. P. Temnikov
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  66. S. Tessaro
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  67. F. Tosello
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  68. V. I. Tretyak
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  69. G. Usai
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  70. S. Vecchi
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  71. L. Venturelli
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  72. M. Villa
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  73. A. Vitale
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  74. A. Zenoni
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  75. A. Zoccoli
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  76. G. Zosi
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The OBELIX Collaboration

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The OBELIX Collaboration., Ableev, V.G., Agnello, M. et al. A study of pontecorvo reactions in antiproton deuterium annihilations at rest. Nuov Cim A 107, 2837–2852 (1994). https://doi.org/10.1007/BF02730960

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  • DOI: https://doi.org/10.1007/BF02730960

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