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Experimental determination of the branching ratios\(p\bar p \to 2\pi ^0 ,\pi ^0 \gamma \), and 2γ at rest

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Zeitschrift für Physik C Particles and Fields

Abstract

The branching ratios of\(p\bar p\) annihilations into the neutral final states 2π0, π0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are\(B_{2\pi ^0 } = \left( {2.06 \pm 0.14} \right) \times 10^{ - 4} \),\(B_{\pi ^0 \gamma } = \left( {1.74 \pm 0.22} \right) \times 10^{ - 5} \), andB γγ<1.7×10−6 (95% c.l.).

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Author notes

  1. D. Tröster

    Present address: CERN, CH-1211, Geneva 23, Switzerland

  2. S. Carius & M. D. Cooper

    Present address: Los Alamos National Laboratory, 87545, Los Alamos, NM, USA

  3. J. Repond

    Present address: Argonne National Laboratory, Argonne, Ill., USA

  4. M. C. S. Williams

    Present address: Dept. of Physics, University of California, Davis, Calif., USA

  5. H. O. Meyer

    Present address: Indiana University, Bloomington, Ind., USA

Authors and Affiliations

  1. Institute for Physics, University of Basel, CH-4056, Basel, Switzerland

    G. Backenstoss, M. D. Cooper, Ch. Findeisen, M. Hugi, H. O. Meyer, J. Repond, L. Tauscher, D. Tröster & M. C. S. Williams

  2. Research Institute of Physics, S-11346, Stockholm, Sweden

    L. Adiels, I. Bergström, S. Carius & A. Kerek

  3. University of Thessaloniki, GR-54006, Thessaloniki, Greece

    S. Charalambous, D. Hatzifotiadou & K. Zioutas

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

    P. Pavlopoulos

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  1. L. Adiels
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  2. G. Backenstoss
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  3. I. Bergström
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  6. M. D. Cooper
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  7. Ch. Findeisen
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  8. D. Hatzifotiadou
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  9. M. Hugi
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  10. A. Kerek
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  11. H. O. Meyer
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  14. L. Tauscher
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  15. D. Tröster
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  16. M. C. S. Williams
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  17. K. Zioutas
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Adiels, L., Backenstoss, G., Bergström, I. et al. Experimental determination of the branching ratios\(p\bar p \to 2\pi ^0 ,\pi ^0 \gamma \), and 2γ at rest. Z. Phys. C - Particles and Fields 35, 15–19 (1987). https://doi.org/10.1007/BF01561050

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  • DOI: https://doi.org/10.1007/BF01561050

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