Amplitude analysis of γγ → ππ from threshold to 1.4 GeV
Creators
- 1. Rutherford Appleton Lab., Chilton (UK)
- 2. Durham Univ. (UK)
Description
A new amplitude analysis of results on γγ→π+π- from the Mark II and γγ→π0π0 from the Crystal Ball experiments is reported. Key constraints from the low energy theorem and from analyticity and unitarity that relate γγ→ππ to other meson scattering reactions are built into the trial forms. Despite these restrictions, the limited angular coverage of the experiments means that solutions with quite different proportions of S wave and D waves of both helicities 0 and 2 are admitted above 1 GeV. This leads to a much wider range of possibilities for the couplings of the broad resonances f0(ε) and F2(1270) than is commonly supposed. The better fits have Γsub f0 in excess of 4 keV and a ratio of Γsub f0/Γ f2 greater than 2. (Author)
Availability note (English)
MF available from INIS under the Report Number.
Files
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Additional details
Publishing Information
- Imprint Pagination
- 30 p.
- Report number
- RAL--90-030
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 21077621
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- GAMMA RADIATION; GEV RANGE 01-10; MESON-MESON INTERACTIONS; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; SCATTERING AMPLITUDES; THRESHOLD ENERGY
- Descriptors DEC
- AMPLITUDES; BOSONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; IONIZING RADIATIONS; MESONS; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; RADIATIONS
Optional Information
- Secondary number(s)
- DTP--90-24.