Published June 1986 | Version v1
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The anti pp yields anti λ λ reaction near threshold

Creators

Description

Measurements of differential and integrated cross sections as well as final state polarizations for the anti p p → anti Λ Λ reaction are presented. The reaction was studied at two incident antiproton momenta (1476.5 MeV/c and 1507.5 MeV/c) corresponding to total center of mass energies of 15.5 MeV and 26.4 MeV above the reaction threshold. The trajectories of charged decay products of the anti Λ and Λ were observed in a multiwire proportional chamber and in two sets of drift chambers. The data were analyzed with a computer program which reconstructed anti p p → anti Λ Λ → anti p π+pπ- events and performed kinematic fitting. The results are compared to several recent meson exchange calculations, and a one-gluon exchange calculation. The experiment was performed at the Low Energy Antiproton Ring (LEAR) at CERN. The data presented represent the first results of the PS185 collaboration's study of the threshold production of hyperon-antihyperon states

Availability note (English)

MF available from INIS under the Report Number; Available from NTIS, PC A08/MF A01; 1 as DE87003382.

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Additional details

Publishing Information

Imprint Pagination
153 p.
Report number
DOE/ER/03244--133

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
18054495
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data, Thesis
Descriptors DEI
ANGULAR DISTRIBUTION; CERN LEAR; DATA PROCESSING; DIFFERENTIAL CROSS SECTIONS; EXPERIMENTAL DATA; LAMBDA PARTICLES; MEV RANGE 10-100; MULTIWIRE PROPORTIONAL CHAMBER; PARTICLE PRODUCTION; POLARIZED PRODUCTS; POTENTIALS; PROTON-ANTIPROTON INTERACTIONS; SPIN ORIENTATION; TOTAL CROSS SECTIONS
Descriptors DEC
BARYON-BARYON INTERACTIONS; BARYONS; CROSS SECTIONS; DATA; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INFORMATION; INTERACTIONS; MEASURING INSTRUMENTS; MEV RANGE; NUCLEON-ANTINUCLEON INTERACTIO; NUMERICAL DATA; ORIENTATION; PARTICLE INTERACTIONS; PROPORTIONAL COUNTERS; RADIATION DETECTORS; STRANGE PARTICLES

Optional Information

Notes
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