Evidence for a new state produced in antiproton annihilations at rest in liquid deuterium

Journal Article · Mon Jan 20 04:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.56.211· OSTI ID:6099801

Bridges, D; Brown, H; Daftari, I; Debbe, R; deGuzman, A; Fickinger, W; Gray, L; Kalogeropoulos, T; Marino, R; Peaslee, D

Inclusive charged-pion spectra from p-bard annihilations at rest have been measured in a high-statistics experiment in search of broad states. Analysis of these spectra reveals an enhancement of the ..pi../sup -/ spectrum at 315 MeV/c. This may be interpreted as a production of a new state of mass 1485 MeV/c/sup 2/ and width at most 200 MeV/c/sup 2/ recoiling against the ..pi../sup -/. This quasi two-body final state accounts for a large fraction of the p-barn annihilations.

• Research Organization: Bloomsburg State University at Bloomsburg, Pennsylvania 17815
• OSTI ID: 6099801
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 56:3; ISSN PRLTA
• 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
ACCELERATORS
ANNIHILATION
ANTIPROTON-DEUTERON INTERACTIONS
ANTIPROTON-NEUTRON INTERACTIONS
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
BROOKHAVEN AGS
COINCIDENCE SPECTROMETRY
CYCLIC ACCELERATORS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUCLEON-ANTINUCLEON INTERACTIONS
NUCLEON-DEUTERON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
QUANTUM NUMBERS
RECOILS
SYNCHROTRONS
TIME-OF-FLIGHT METHOD