1 v 1 4 S ep 2 00 3 On threshold amplitudes III : 2 → n processes
نویسندگان
چکیده
The 2 → n scattering with final particles at rest is discussed. The comparison with purely soft processes allows to identify symmetries responsible for vanishing of certain 2 → n amplitudes. Some examples are given. supported by the Lódź University grant N 269 supported by KBN grant N 5 P03B 060 21 1
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