Have quasinuclear NN-bar bound states been discovered

Journal Article · Mon Sep 08 04:00:00 EDT 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.1207· OSTI ID:5108099

Dover, C B

It is suggested that a broad structure X/sup 0/(1480) recently observed in the reaction p-barn..--> pi../sup -/X/sup 0/..-->..3..pi../sup -/2..pi../sup +/ may be interpretable in terms of an unstable quasinuclear bound state of the (complex) nucleon-antinucleon (NN-bar) potential. The observed mass, production branching ratio, and preference for the X/sup 0/..-->..rho/sup 0/rho/sup 0/ rather than ..pi../sup +/..pi../sup -/ decay mode are consistent with a quantum-number assignment J/sup P//sup C/(I/sup G/) = 2/sup ++/(0/sup +/). Prospects for finding the lower-lying 0/sup ++/(0/sup +/) and 1/sup --/(0/sup -/) members of the expected natural-parity quasinuclear band are discussed.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5108099
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:10; ISSN PRLTA
• 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
ANTIPROTON-NEUTRON INTERACTIONS
BARYON-BARYON INTERACTIONS
BARYONIUM
BOSONS
BRANCHING RATIO
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONIC PARTICLE DECAY
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PARTICLE MODELS
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
QUANTUM NUMBERS
QUARK MODEL