Unitarization Technics in Hadron Physics with Historical Remarks

Symmetry

JoséAntonio Oller¹ 

[1] Departamento de Física, Universidad de Murcia, E-30071 Murcia, Spain;

关键词: unitarity;    scattering;    partial-wave amplitudes;    final-state interactions;    analyticity;    S-matrix theory;   

DOI  :  10.3390/sym12071114

来源: DOAJ

【 摘 要 】

We review a series of unitarization techniques that have been used during the last decades, many of them in connection with the advent and development of current algebra and later of Chiral Perturbation Theory. Several methods are discussed like the generalized effective-range expansion, K-matrix approach, Inverse Amplitude Method, Padé approximants and the $N/D$ method. More details are given for the latter though. We also consider how to implement them in order to correct by final-state interactions. In connection with this some other methods are also introduced like the expansion of the inverse of the form factor, the Omnés solution, generalization to coupled channels and the Khuri-Treiman formalism, among others.

【 授权许可】

Unknown