Main properties of the reaction p-barp. -->. p-barp. pi. /sup +/. pi. /sup -/ at 22. 4 GeV/c

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:5160562

We show that the main processes which lead to the final state in the reaction p-barp..-->..p-barp..pi../sup +/..pi../sup -/ at 22.4 GeVc are single vertex diffraction dissociation with the cross section sigma/sub diff/(p) = sigma/sub diff/(p-bar) = 0.42 +- 0.02 mb and pair production of isobars ..delta../sup + +/approx.(..delta../sup + +/) with the cross section sigma(..delta..Delta-bar) = 0.25 +- 0.03 mb. We have determined cross sections for production of ..delta../sup + +/approx.(..delta../sup + +/) isobars and rho/sup 0/ and f mesons. In the effective-mass spectrum of the diffractive system N..pi pi.. we observed a structure which is associated with the production of N*(1500) and N*(1700) isobars. We studied angular characteristics of particles in the channel p-barp..--> delta../sup + +/approx.(..delta../sup + +/), which give evidence for a significant one-pion-exchange contribution

• Research Organization: Institute of High Energy Physics, Serpukhov
• OSTI ID: 5160562
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 46:4; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BARYONS
BOSONS
CROSS SECTIONS
DELTA BARYONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
MASS SPECTRA
MESONS
N BARYONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESONANCE SCATTERING
SCATTERING
SPECTRA