Antiproton-neutron annihilations at rest: Search for broad states

Conference · Sun Jun 30 04:00:00 EDT 1985 · AIP Conf. Proc.; (United States)

OSTI ID:6118402

Kalogeropoulos, T E

The searches so far for meson states produced in p-bar annihilations at rest into ..pi..+X have been sensitive to narrow X states. The combinatorial background and the narrow phase space width in missing mass spectra are the main problems. Most of the theoretical models predict broad states. We have measured in a high statistis experiment p-bar(at rest)d..--> pi../sup +- /+Anything inclusive spectra. Using a novel analysis technique the ..pi../sup +/..pi../sup -/ difference spectra, it is shown that the p-barn annihilation is dominated by two-body cascades. Two new states of opposite G-parity of (mass, width) = (1480, 100) MeV/c/sup 2/ are dominant. The G = +1 state has a large decay branching ratio into rho/sup 0/rho/sup 0/. Other features are presented.

• Research Organization: Physics Department, Syracuse University, Syracuse, N.Y. 13210
• OSTI ID: 6118402
• Report Number(s): CONF-8504133-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 132:1
• 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
ANNIHILATION
ANTIPROTON-NEUTRON INTERACTIONS
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASS DISTRIBUTION
MESON RESONANCES
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SPATIAL DISTRIBUTION