Phys. Rev. Lett. 17, 616–621 (1966)Pion Scattering LengthsReceived 20 June 1966; published in the issue dated 12 September 1966 The current commutation relations1 and partially conserved axial-vector current (PCAC) assumption2,3 allow the calculation of the matrix elements for emission and absorption of any number of soft pions4 and, therefore, in particular, determine the scattering length of a pion on any target particle. In this note we give a simple formula for pion scattering on any particle but a pion5, and then extend this result to the more difficult case of pion-pion scattering. © 1966 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.17.616
DOI:
10.1103/PhysRevLett.17.616
PACS:
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