加载中…
1994-09-29
What is a low-energy theorem ?
G. EckerU. -G. Meissner
文献摘要
We discuss the meaning of low-energy theorems (LETs) in the framework of the effective field theory of the standard model. Particular emphasis is put on the LET for neutral pion photoproduction off nucleons at threshold. The seemingly controversial situation surrounding this LET is clarified.
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