Antiproton-proton partial-wave analysis below 925 MeV/[ital c]

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.48· OSTI ID:7103788

Timmermans, R; Rijken, T A; de Swart, J J ^[1]

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1. Institute for Theoretical Physics, University of Nijmegen, Nijmegen (Netherlands)

A partial-wave analysis of all [ital [bar p]p] scattering data below 925 MeV/[ital c] antiproton laboratory momentum is presented. The method used is adapted from the Nijmegen phase-shift analyses of [ital pp] and [ital np] scattering data. We solve the Schroedinger equation for the coupled [ital [bar p]p] and [ital [bar n]n] channels where the long- and intermediate-range interactions are described by a theoretically well-founded potential. This gives the rapid variations of the scattering amplitudes with energy. This potential consists of the Coulomb potential with the main relativistic correction, the magnetic-moment interaction, the one-pion-exchange potential, and the heavy-boson exchanges of the Nijmegen one-boson-exchange potential. Slow variations of the amplitudes due to short-range interactions, including the coupling to mesonic annihilation channels, are parametrized by an energy-dependent, complex boundary condition, specified at a radius of [ital r]=1.3 fm. The Nijmegen 1993 [ital [bar p]p] database, consisting of 3646 [ital [bar p]p] scattering data, is presented and discussed. The best fit to this database results in [chi][sub min][sup 2]/[ital N][sub data]=1.043. This good fit to the data shows that the Nijmegen long- and intermediate-range potential is essentially correct. The pseudovector coupling constant of the charged pion to nucleons is determined to be [ital f][sub [ital c]][sup 2]=0.0732(11) at the pion pole, where the error is statistical.

• OSTI ID: 7103788
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662130 -- General Theory of Particles & Fields-- S-Matrix Theory
Relativistic Scattering Theory-- (1992-)
662340 -- Hadron Interactions-- (1992-)
663300 -- Nuclear Reactions & Scattering
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663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANTINEUTRON REACTIONS
ANTINUCLEON REACTIONS
ANTIPROTON REACTIONS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BOSON-EXCHANGE MODELS
COUPLING
COUPLING CONSTANTS
DIFFERENTIAL EQUATIONS
EQUATIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
NEUTRON-ANTINEUTRON INTERACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
OBE MODEL
OPE MODEL
PARTIAL DIFFERENTIAL EQUATIONS
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
PHASE SHIFT
POTENTIALS
PROTON-ANTIPROTON INTERACTIONS
PSEUDOVECTOR COUPLING
SCATTERING AMPLITUDES
SCHROEDINGER EQUATION
WAVE EQUATIONS