Experimental study of the near threshold [pi][sup +][ital p][r arrow][pi][sup +][pi][sup +][ital n] cross section and chiral symmetry

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.3987· OSTI ID:6132873

Sevior, M E; Ambardar, A; Brack, J T; Camerini, P; Duncan, F; Ernst, J; Feltham, A; Grion, N; Johnson, R R; Koch, G; Meirav, O; Ottewell, D F; Rui, R; Smith, G R; Sossi, V; Theis, D; Vetterli, D ^[1]

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1. University of Melbourne; Parkville; Victoria; 3052 (Australia) University of British Columbia; Vancouver; British Columbia; Canada V6T Universitaet Bonn; D-5300 Bonn 1 (Germany) TRIUMF; Vancouver; British Columbia; V6T 2A6 (Canada) Dipartimento di Fisica dell'Universita di Trieste 34127 Triest (Italy) Istituto Nazionale di Fisica Nucleare; 34127 Trieste (Italy) Elscint; Haifa (Israel) Institute for Intermediate Physics; ETH-Hoenggerberg; 8093 Zuerich (Switzerland) Institut fuer Experimental Physik; Klingelbergstrasse 82; CH-4052; Basel (Switzerland)

Total cross-section measurements of the [pi][sup +][ital p][r arrow][pi][sup +][pi][sup +][ital n] reaction at pion kinetic energies of 180, 184, 190, and 200 MeV are reported. The threshold value for the amplitude [ital a]([pi][sup +][pi][sup +]) as well as the [ital s]-wave, isospin 2, [pi][pi] scatteirng length [ital a][sub 2][sup 0] were determined. The results were found to be in agreement with chiral perturbation theory and inconsistent with the calculations of Jacob and Scadron and the model of dominance by quark loop anomalies.

• OSTI ID: 6132873
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662340* -- Hadron Interactions-- (1992-)
663460 -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
BARYONS
BOSONS
CHIRAL SYMMETRY
CROSS SECTIONS
DIMENSIONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
KINETIC ENERGY
LENGTH
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NEUTRONS
NUCLEONS
PARTIAL WAVES
PARTICLE INTERACTIONS
PERTURBATION THEORY
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS PLUS
PSEUDOSCALAR MESONS
S WAVES
SCATTERING
SCATTERING LENGTHS
SYMMETRY
TOTAL CROSS SECTIONS