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Partial wave analysis in K ‐matrix formalism
Author(s) -
Chung S. U.,
Brose J.,
Hackmann R.,
Klempt E.,
Spanier S.,
Strassburger C.
Publication year - 1995
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19955070504
Subject(s) - formalism (music) , physics , scattering , s matrix , scattering amplitude , matrix (chemical analysis) , mathematical physics , quantum mechanics , materials science , art , musical , composite material , visual arts
A description is given of the K ‐matrix formalism. The formalism, which is normally applied to two‐body scattering processes, is generalized to production of two‐body channels with finalstate interactions. A multi‐channel treatment of production of resonances has been worked out in the P ‐vector approach of Aitchison. An alternative approach, derived from the P ‐vector, gives the production amplitude as a product of the T ‐matrix for a two‐body system and a vector Q specifying its production. This formulation, called Q ‐vector approach here, has also been worked out. Examples of practical importance are given.