Summary
We obtain a denumerable set of rigorous inequalities on the π0π0-π0π0 partial-wave amplitudes which guarantee that the amplitude is crossing symmetric. The numerical inequalities presented for the case of S and D waves indicate that one has very little freedom in the choice of the D-waves once the .S-waves are given.
Riassunto
Si ottiene un insieme numerabilc di disuguaglianze rigorose sulle ampiezze d’onda parziale di π0π0-π0π0 che garantiscono che l’ampiezza ha simmetria incrociata. Le disuguaglianze numeriche preseutate per il caso delle onde S e D indicano che si ha scarsa libertà di scelta per le onde D una volta date le onde S.
Резюме
Мы получаем конечную систему строгих нера венств на π0π0 → π0π0 нарниальные амнлзту ды, которые гарантиру ют, что эта амнлитуда я вляется кроссинг-симметричной. Чзслен ные неравенства, нред ставленные для случа яиволн, указывают, что змеетс я очень мало свободы в выбореволн, нослет огокакволны заданы.
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Martin, A. Crossing conditions for the pion-pion amplitude. Nuovo Cimento A (1965-1970) 63, 167–180 (1969). https://doi.org/10.1007/BF02963164
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DOI: https://doi.org/10.1007/BF02963164