Published March 1995
| Version v1
Miscellaneous
Photon-photon scattering to two loops
Creators
- 1. Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati
Description
We analyze the Chiral Perturbation Theory predictions for γγ → π0π0 to two loops. The amplitude to this order depends on three new counterterms which can be estimated using resonance exchange. The low-energy cross section is in good agreement with the present data and with calculations based on dispersion relations. We predict the Compton cross section and the neutral pion polarizabilities to the two-loop order. The unitarization of the one-loop cross section is also discussed. (orig.)
Additional details
Publishing Information
- Imprint Title
- Proceedings of the 28. international symposium Ahrenshoop on the theory of elementary particles
- Imprint Pagination
- 418 p.
- Journal Page Range
- p. 268-274.
- ISSN
- 0418-9833
- Report number
- DESY--95-027
Conference
- Title
- 28. international symposium on the theory of elementary particles.
- Original Conference Title
- 28. Internationales Symposium zur Theorie der Elementarteilchen
- Dates
- 30 Aug - 4 Sep 1994.
- Place
- Wendisch Rietz (Germany).
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 27012061
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- CHIRAL SYMMETRY; COMPTON EFFECT; CROSS SECTIONS; PARTICLE PRODUCTION; PERTURBATION THEORY; PHOTON-PHOTON INTERACTIONS; PIONS NEUTRAL; POLARIZABILITY; QUANTUM CHROMODYNAMICS
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; ELASTIC SCATTERING; ELECTRICAL PROPERTIES; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; FIELD THEORIES; HADRONS; INTERACTIONS; MESONS; PARTICLE INTERACTIONS; PHYSICAL PROPERTIES; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SCATTERING; SYMMETRY