Effect of annihilation on quasinuclear above-threshold resonances in the nucleon-antinucleon system

Journal Article · Sat Dec 01 04:00:00 EST 1979 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:5094867

Kudryavtsev, A E; Tyapaev, R T

A simple two-channel potential model is used to study the effect of annihilation on the positions and widths of the quasinuclear s-wave resonances in the NNB system. An equation is obtained which gives the shift of the quasinuclear levels as a function of the channel-coupled constant lambda. It is shown that under certain conditions the inclusion of annihilaton leads to a decrease of the total resonance width. The physical reason for this phenomenon is discussed. The dependence of the partial widths of the quasinuclear resonances on the constant lambda is obtained. It is also shown that for lambda..-->.. +- the annihilation width GAMMA/sub an/..-->..0 and that small shifts of the quasinuclear levels are compatible with the large annihilation cross section that is observed experimentally.

• Research Organization: Institute of Theoretical and Experimental Physics, State Commission on the Use of Atomic Energy
• OSTI ID: 5094867
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 30:6; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645205* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 0-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYON RESONANCES
BARYON-BARYON INTERACTIONS
BARYONS
BASIC INTERACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTIAL WAVES
PARTICLE INTERACTIONS
RESONANCE PARTICLES
S WAVES