Published July 1987
| Version v1
Report
Two photon physics with the Crystal Ball
Description
Two-photon collisions leading to final states consisting entirely of photons have been investigated with the Crystal Ball detector at the e+e- storage ring DORIS II at DESY. The process γγ → π0π0 is observed down to π0π0 threshold. The preliminary cross section and angular distributions are presented. Formation of the π0, η, and η' are measured in γγ → γγ. The η' is also measured in γγ → ηπ0π0, and the η is observed in γγ → 3π0. No signal is seen for formation of a radially excited pseudoscalar in the ηπ0π0 or 3π0 final state. (author)
Additional details
Publishing Information
- Imprint Title
- Proceedings of the second international conference on hadron spectroscopy
- Imprint Pagination
- 510 p.
- Journal Page Range
- p. 98-106.
- Report number
- KEK--87-7
Conference
- Title
- 2. international conference on hadron spectroscopy.
- Dates
- 16-18 Apr 1987.
- Place
- Oho, Ibaraki (Japan).
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 19043552
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- ANGULAR DISTRIBUTION; CROSS SECTIONS; DORIS STORAGE RING; ETA MESONS; EXCITED STATES; EXPERIMENTAL DATA; PHOTON-PHOTON INTERACTIONS; PIONS NEUTRAL
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; DATA; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY LEVELS; HADRONS; INFORMATION; INTERACTIONS; MESONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; STORAGE RINGS