Matrix element of the reaction. pi. /sup -/p. --> pi. /sup 0/. pi. /sup 0/n near threshold
Journal Article
·
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:6375831
We obtain a phenomenological matrix element that makes it possible to describe the spectra of the ..gamma.. quanta from the reaction ..pi../sup -/p..--> pi../sup 0/..pi../sup 0/n near threshold. The matrix element takes the form M/sup 2/=)1+A (p*/sub ..pi..-/p*)) )/sup 2/+B((p*/sub ..pi../sup 01// - ..beta..*/sub ..pi../sup 02//) p*/sub ..pi../sup 02// p*/sub n/)/sup 2/ an energy 270 MeV, where A=0.5m/sub ..pi..//sup -2/ and B=3m/sub ..pi..//sup -4/. The registration efficiency of the ..gamma.. quanta from the reaction ..pi../sup -/p..--> pi../sup 0/..pi../sup 0/n, calculated with the new matrix element, agrees with the counts obtained with Cerenkov counters in a different geometry. The total cross section of this reaction at 270 MeV is 0.26 +- 0.02 mb. An isotopic analysis of the reactions ..pi..Nreverse arrow..pi pi..N was performed at this energy. The ratio X=F/sub 10//F/sub 32/ of the isotopic amplitudes is 4.4 +- 0.4.
- Research Organization:
- Joint Institute for Nuclear Research
- OSTI ID:
- 6375831
- Journal Information:
- Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 28:5; ISSN SJNCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Study of the reaction. pi. /sup -/p. --> pi. /sup 0/. pi. /sup 0/n near threshold
pi. -p. --> pi. /sup 0/. pi. /sup 0/n and. pi. -p. --> pi. /sup 0/. gamma. n at 270 MeV
PRODUCTION OF $pi$$sup 0$-MESONS IN COLLISIONS BETWEEN 2.8 BeV/c$pi$$sup -$- MESONS AND PROTONS
Journal Article
·
Mon Dec 31 23:00:00 EST 1979
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
·
OSTI ID:7053341
pi. -p. --> pi. /sup 0/. pi. /sup 0/n and. pi. -p. --> pi. /sup 0/. gamma. n at 270 MeV
Journal Article
·
Mon Jan 31 23:00:00 EST 1977
· Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
·
OSTI ID:7288771
PRODUCTION OF $pi$$sup 0$-MESONS IN COLLISIONS BETWEEN 2.8 BeV/c$pi$$sup -$- MESONS AND PROTONS
Journal Article
·
Mon Oct 31 23:00:00 EST 1960
· Zhur. Eksptl'. i Teoret. Fiz.
·
OSTI ID:4099325
Related Subjects
645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BOSONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASSLESS PARTICLES
MATRIX ELEMENTS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
PARTICLE INTERACTIONS
PHOTONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
SCATTERING AMPLITUDES
SPECTRA
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BOSONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASSLESS PARTICLES
MATRIX ELEMENTS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
PARTICLE INTERACTIONS
PHOTONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
SCATTERING AMPLITUDES
SPECTRA