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Studies of\(\bar pp \to \bar nn\) and\(\bar np\) annihilation at incident momenta of 700 and 760 MeV/c

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Zeitschrift für Physik C Particles and Fields

Abstract

Results are presented on the charge exchange reaction\(\bar pp \to \bar nn\) and\(\bar np\) annihilations from bubble chamber exposures to antiproton beam of momenta 700 and 760 MeV/c. The differential cross section of\(\bar pp \to \bar nn\) shows a forward spike followed by a clear dip bump structure. Total annihilation cross section of\(\bar np\) for average\(\bar n\) momentum of 700 MeV/c has been evaluated to be 55.4±2.2 mb. The multiplicity, Feynmanx andp 2 T distributions for inclusive charged pions in\(\bar pp\) and\(\bar np\) annihilations are found to be similar. The emission of charged pions from\(\bar np\) annihilations are found to be consistent with thermodynamic models with temperature ∼110 MeV.

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Authors and Affiliations

  1. Tata Institute of Fundamental Research, 400005, Bombay, India

    S. Banerjee, S. N. Ganguli, A. Gurtu, P. K. Malhotra, R. Raghavan, A. Subramanian, K. Sudhakar, P. V. K. S. Baba & T. Hirose

  2. Panjab University, 160 014, Chandigarh, India

    M. M. Agarwal, J. M. Kohli, J. P. Lamba, I. S. Mittra, J. B. Singh & P. M. Sood

  3. University of Jammu, 180 001, Jammu, India

    Dev Anand, G. L. Kaul, Y. Prakash, N. K. Rao & G. Singh

  4. Tokyo Metropolitan University, Tokyo, Japan

    R. Hamatsu, S. Kitamura & T. Yamagata

Authors
  1. S. Banerjee
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  2. S. N. Ganguli
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  3. A. Gurtu
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  4. P. K. Malhotra
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  5. R. Raghavan
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  6. A. Subramanian
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  7. K. Sudhakar
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  8. M. M. Agarwal
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  9. J. M. Kohli
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  10. J. P. Lamba
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  11. I. S. Mittra
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  12. J. B. Singh
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  13. P. M. Sood
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  14. Dev Anand
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  15. P. V. K. S. Baba
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  16. G. L. Kaul
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  17. Y. Prakash
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  18. N. K. Rao
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  19. G. Singh
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  20. R. Hamatsu
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  21. T. Hirose
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  22. S. Kitamura
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  23. T. Yamagata
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Banerjee, S., Ganguli, S.N., Gurtu, A. et al. Studies of\(\bar pp \to \bar nn\) and\(\bar np\) annihilation at incident momenta of 700 and 760 MeV/c. Z. Phys. C - Particles and Fields 28, 163–170 (1985). https://doi.org/10.1007/BF01575719

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  • DOI: https://doi.org/10.1007/BF01575719

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