Summary
Using the behaviour of the transversity amplitudes neart=0, we obtain that some linear combinations of regularized helicity amplitudes and their derivatives at this point have to vanish. The calculation is performed for the EU-mass case in the general spin configuration.
Riassunto
Usando il comportamento delle ampiezze di trasversalità at=0, si ottiene che alcune combinazioni lineari di ampiezze di elicità e loro derivate in questo punto devono annullarsi. Il calcolo ζ eseguito per il caso di masse uguali-disuguali in una configurazione generica di spin.
Резюме
Используя поведение поперечных амплитуд вдлизиt=0, мы получаем, что некоторые линейные комдинации регуляризованных спиральных амплитуд и их производных в этой точке должны обрщаться в нуль. Вычисление проводится для случая равных-неравных масс в одщей спивовой конфигурации.
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Paciello, M.L., Taglienti, B. Kinematical constraints att=0 for regularized helicity amplitudes: The equal-unequal-mass case. Nuovo Cimento A (1965-1970) 61, 457–462 (1969). https://doi.org/10.1007/BF02756854
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DOI: https://doi.org/10.1007/BF02756854