Feynman rules for processes involving composite bound systems
- 1 April 1983
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 9 (4) , 357-371
- https://doi.org/10.1088/0305-4616/9/4/004
Abstract
A set of Feynman rules is developed to deal with any Bethe-Salpeter model description of baryons and mesons interacting through any effective current-current interaction. The rules follow from the Mandelstam generalisation of the Gell-Mann-Low method to compute matrix elements and are used to evaluate the Delta T=1/2 enhancement in the process K to 2 pi .Keywords
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