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pi. -p. --> pi. /sup 0/. pi. /sup 0/n and. pi. -p. --> pi. /sup 0/. gamma. n at 270 MeV

Journal Article · · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:7288771
; ; ; ; ; ;
Partial cross sections d/sup 4/sigma/d..cap omega../sub 1/d..cap omega../sub 2/dE/sub ..gamma../dE/sub ..gamma../ for ..gamma.. production in the reactions ..pi..-p..--> pi../sup 0/..pi../sup 0/n and ..pi..-p..--> pi../sup 0/..gamma..n are measured with a 4-channel hodoscope of Cherenkov ..gamma.. spectrometers and with scintillation counters. The ..gamma.. spectra for both reactions are obtained at laboratory angles 60/sup 0/, 90/sup 0/, and 120/sup 0/. The cross section for ..pi../sup -/p..--> pi../sup 0/..gamma..n is calculated. The total cross section for ..pi..-p..--> pi../sup 0/..pi../sup 0/n is 0.32 +- 0.04 mb; the total cross section for ..pi..-p..--> pi../sup 0/..gamma..n is 0.33 +- 0.03 mb. An isotopic analysis of the ..pi..N..--> pi pi..N reactions is carried out at 270 MeV. It is shown that in the soft-pion model the total cross sections for ..pi..N..--> pi pi..N cannot be described by any of the considered variants of chiral symmetry breaking.
Research Organization:
Joint Institute for Nuclear Research, Dubna, USSR
OSTI ID:
7288771
Journal Information:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 25:2; ISSN SJNCA
Country of Publication:
United States
Language:
English

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Related Subjects

645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
BOSONS
CHARGE-EXCHANGE INTERACTIONS
CHIRAL SYMMETRY
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GAMMA SPECTRA
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASSLESS PARTICLES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEONS
PARTICLE INTERACTIONS
PHOTONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
SPECTRA
STRONG INTERACTIONS
SYMMETRY
SYMMETRY BREAKING
TOTAL CROSS SECTIONS