Measurement of antineutron-proton total and annihilation cross sections from 100 to 500 MeV/c

Journal Article · Sat Aug 01 00:00:00 EDT 1987 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.36.659· OSTI ID:6059580

Armstrong, T; Chu, a C; Clement, b J; Elinon, c C; Furic, a M; Hartman, b K; Hicks, a A; Hungerford, a E; Kishimoto, b T; Kruk, b J; others, and

Total and annihilation n-barp cross sections from 100 to 500 MeV/c are reported, the first such measurements with good statistics in this momentum range. These cross sections are well represented by A+B/p, where p is the incident antineutron momentum, and are in agreement with previous n-barp and p-barn measurements. A comparison of these cross sections with phenomenological potential model calculations is good overall. However, the microscopic quark model gives unsatisfactory predictions. The agreement between previous p-barp annihilation cross sections and n-barp cross sections above 300 MeV/c is excellent. The total n-barp cross section is lower than the total p-barp cross section in this momentum range. Both of these types of behavior are predicted by potential models. The anticipated availability of future p-barp data below 300 MeV/c should indicate whether these trends continue at lower momenta.

• Research Organization: aLaboratory for Elementary Particle Science, Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802
• OSTI ID: 6059580
• Journal Information: Phys. Rev. D; (United States), Vol. 36:3
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON-ANTINEUTRON INTERACTIONS
ANNIHILATION
TOTAL CROSS SECTIONS
EXPERIMENTAL DATA
FEYNMAN DIAGRAM
ISOSPIN
MEV RANGE 100-1000
NUCLEON-NUCLEON INTERACTIONS
OBE MODEL
PHASE SHIFT
POTENTIALS
PROTON-ANTIPROTON INTERACTIONS
QUARK MODEL
SCATTERING
SPIN
ANGULAR MOMENTUM
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSON-EXCHANGE MODELS
COMPOSITE MODELS
CROSS SECTIONS
DATA
DIAGRAMS
ELECTROMAGNETIC INTERACTIONS
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MEV RANGE
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
645103* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties