Dispersive approach to chiral perturbation theory

Autor(en)

Martin Zdrahal, J Novotný

Abstrakt

We generalize the reconstruction theorem of Stern, Sazdjian, and Fuchs based on the dispersion relations to the case of the (2→2) scattering of all the pseudoscalar octet mesons (π,K,η). We formulate it in a general way and include also a discussion of the assumptions of the theorem. It is used to obtain the amplitudes of all such processes in the isospin limit to the one-loop order (and can be straightforwardly extended to two loops) independently on the particular power-counting scheme of the chiral perturbation theory in question. The results in this general form are presented.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Charles University Prague

Journal

Physical Review D

Band

78

Anzahl der Seiten

21

ISSN

1550-7998

Publikationsdatum

2008

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/dispersive-approach-to-chiral-perturbation-theory(a12d1f23-23f9-4846-84f4-5c571b8728f8).html