Published 1988
| Version v1
Report
Open
About ω0 - exchange in (γ, π0) reactions on proton and carbon near threshold
- 1. Kazakhskij Gosudarstvennyj Univ., Alma-Ata (USSR)
- 2. Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Theoretical Physics
- 3. 4336000SU
Description
With the amplitudes obtained in the effective Lagrangian (BL) and the dispersion (BWD) methods the new data for the (γ, π0) reaction on proton near the threshold are analysed. It has been found that the BL-amplitude gives the tensor to vector ratio of the ωNN coupling two times latger than the simple vector dominance model. The value of this ratio in the case of the BDW-amplitude has an opposite sign and is consistent with the results of other analyses. The new versions of the BL- and BDW-amplitudes lead to overestimated DWIA results for the (γ, π0) process on carbon-12 at Eγ ∼ 230 MeV and to good agreement with the data in the threshold and Δ33 resonance region
Availability note (English)
MF available from INIS under the Report Number.Files
20028362.pdf
Files
(247.5 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:f9ba79a866e7f16b046ccd7036a52542
|
247.5 kB | Preview Download |
Additional details
Publishing Information
- Imprint Pagination
- 10 p.
- Report number
- JINR-E--4-88-123
INIS
- Country of Publication
- USSR
- Country of Input or Organization
- USSR
- INIS RN
- 20028362
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- AMPLITUDES; ANGULAR DISTRIBUTION; CARBON 12 TARGET; COUPLING CONSTANTS; CROSS SECTIONS; DISPERSION RELATIONS; HYDROGEN 1 TARGET; LAGRANGIAN FUNCTION; MEV RANGE 100-1000; MULTIPOLES; NUCLEAR REACTION KINETICS; OMEGA-783 MESONS; PHOTONUCLEAR REACTIONS; PHOTOPRODUCTION; PIONS NEUTRAL
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FUNCTIONS; HADRONS; INTERACTIONS; KINETICS; MESONS; MEV RANGE; NUCLEAR REACTIONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PIONS; PSEUDOSCALAR MESONS; REACTION KINETICS; TARGETS; VECTOR MESONS
Optional Information
- Notes
- 16 refs.; 4 figs.; 1 tab.; submitted to the journal Phys. Lett., B.