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Question of a second neutral pion

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Il Nuovo Cimento (1955-1965)

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References

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  2. Strictly speaking, the σ−/σ+ ratio does not depend on the coupling constant; however, it depends on an unknown parameterN (−) (see ref. (3)). The ratio 1.4 is obtained it this parameter is chosen to yield the observed value (4) of σ+ with a value off 2=0.08. SettingN (−)=0 gives a ratio of 1.3 but requiresf 2=0.06 to obtain σ+ correctly. On the other hand, ifN (−) is adjusted to give σ−/σ+=2.0, we would requiref 2=0.32 to achieve agreement with σ+.

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  11. This reaction is mentioned byYamaguchi although he states that it is forbidden for pseudoscalar π 00 . We do not agree with this remark.

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Author notes

  1. A. M. Baldin

    Present address: Physical Institute of Academy of Sciences of U.S.S.R., Moscow

  2. P. K. Kabir

    Present address: Institute of Nuclear Physics, Calcutta

Authors and Affiliations

  1. Department of Mathematical Physics, University of Birmingham, England

    A. M. Baldin & P. K. Kabir

Authors
  1. A. M. Baldin
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  2. P. K. Kabir
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Additional information

This question is also discussed byY. Yamaguchi (preprint).

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Baldin, A.M., Kabir, P.K. Question of a second neutral pion. Nuovo Cim 9, 547–550 (1958). https://doi.org/10.1007/BF02725111

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