ABSTRACT
There are other particles strongly coupled to pions and nucleons. About 7 or 8 years ago some new particles were discovered in cosmic rays. For example, there was (now called Λ) a neutral particle which disintegrated into a p and π−: () Λ → p + π − https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429492501/e6a0c676-1f8d-4684-97a0-6bf3353f7ce0/content/eq104.tif"/>
