Study of the reaction e/sup +/e/sup -/. pi. /sup +/. pi. /sup -/ in the energy range from 640 to 1400 MeV
Journal Article
·
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:5902514
A detailed study of the pion electromagnetic form factor has been carried out in the energy interval 640--1400 MeV in the c.m.s. The experiment was performed in the VEPP-2M storage ring with the OLYa detector. Improved parameters have been obtained for the rho meson and for rho..omega.. interference. Analysis of the results at (s)/sup 1/2/ >1000 MeV has shown that the behavior of the pion form factor in this region cannot be fitted by the sum of the rho and rho'(1600) mesons. A satisfactory description of the pion form factor in the timelike region is achieved with introduction of an additional resonance rho'(1250) or with phenomenological inclusion of the contribution of multihadron channels of e/sup +/e/sup -/ annihilation to the form factor.
- Research Organization:
- Nuclear Physics Institute, Siberian Division, USSR Academy of Sciences
- OSTI ID:
- 5902514
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 40:2; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5500023
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC FORM FACTORS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FORM FACTORS
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESON RESONANCES
MESONS
MEV RANGE
MEV RANGE 100-1000
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
RHO-765 RESONANCES
TOTAL CROSS SECTIONS
VECTOR MESONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC FORM FACTORS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FORM FACTORS
GEV RANGE
GEV RANGE 01-10
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESON RESONANCES
MESONS
MEV RANGE
MEV RANGE 100-1000
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
RHO-765 RESONANCES
TOTAL CROSS SECTIONS
VECTOR MESONS