Precise analysis of {pi}{pi} scattering data from Roy equations and forward dispersion relations

Journal Article · Sun Aug 31 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2973509· OSTI ID:21149177

Pelaez, J R; Martin, R Garci ^[1]; Kaminski, R ^[2]; Yndurain, F J ^[3]

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1. Departamento de Fisica Teorica II, Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, E-28040, Madrid (Spain)
2. Department of Theoretical Physics Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, 31-342, Krakow (Poland)
3. Departamento de Fisica Teorica, C-XI, Universidad Autonoma de Madrid, Canto Blanco, 28049, Madrid (Spain)

We review our recent analysis of {pi}{pi} scattering data in terms of Roy equations and Forward Dispersion Relations, and present some preliminary results in terms of a new set of once-subtracted coupled equations for partial waves. The first analysis consists of independent fits to the different {pi}{pi} channels that satisfies rather well the dispersive representation. In the second analysis we constrain the fit with the dispersion relations. The latter provides a very precise and model independent description of data using just analyticity, causality and crossing.

• OSTI ID: 21149177
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1030; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CAUSALITY
CHIRAL SYMMETRY
DATA ANALYSIS
DISPERSION RELATIONS
PARTIAL WAVES
PERTURBATION THEORY
PION-PION INTERACTIONS
SCATTERING
SYMMETRY BREAKING