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Progress in hyperon production at LEAR (Low-Energy Antiproton Ring)

Technical Report ·
DOI:https://doi.org/10.2172/6955265· OSTI ID:6955265
 [1]
  1. Kernforschungsanlage Juelich GmbH (Germany, F.R.). Inst. fuer Kernphysik European Organization for Nuclear Research, Geneva (Switzerland)
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The studies of hyperon reactions with antiprotons close to threshold offer an excellent opportunity to examine the dynamics of strangeness creation. At the LEAR facility at CERN, the PS185 Collaboration has initiated a set of measurements of the process {bar p}p {yields} {bar {Lambda}}{Lambda} between the reaction threshold and excess energies of 170 MeV. Above an antiproton momentum of 1.65 GeV/c the reaction {bar p}p {yields} {bar {Lambda}}{Sigma}{sup 0} + c.c. offers the possibility of studying the isospin structure in strangeness exchange (I = J = 0 for the {Lambda} and I = J = 1 for the {Sigma}{sup 0}). For the charged {bar {Sigma}}{Sigma} channels ({Sigma}{sup +} and {Sigma}{sup {minus}}), no data exist in the accessible range of LEAR, which corresponds to the region close to threshold. A dedicated run of experiment PS185 to measure the reactions {bar p}p {yields} {bar {Sigma}{sup +}}{Sigma}{sup +} and {bar p}p {yields} {bar {Sigma}{sup {minus}}}{Sigma}{sup {minus}} is in preparation. 19 refs., 5 figs.

Research Organization:
Carnegie-Mellon Univ., Pittsburgh, PA (USA)
Sponsoring Organization:
DOE/ER
DOE Contract Number:
FG02-87ER40315
OSTI ID:
6955265
Report Number(s):
DOE/ER/40315-172; ON: DE90010520
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BARYONS
COMPOSITE MODELS
CROSS SECTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
ISOSPIN
LAMBDA BARYONS
LAMBDA PARTICLES
MATHEMATICAL MODELS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PROTON-ANTIPROTON INTERACTIONS
QUARK MODEL
SIGMA BARYONS
SIGMA PARTICLES
STRANGE PARTICLES
STRANGENESS