Fluxes and background from. Sigma. sup + yields polarized proton at Fermilab

Conference · Sun Oct 01 04:00:00 EDT 1989

OSTI ID:5439542

Carey, D C

The decay of a {Sigma}{sup +} hyperon produces a proton whose polarization is correlated with its momentum in the hyperon center of mass. The positive charge of the hyperon allows momentum selection both on it and on the proton. A beam of longitudinally polarized protons can be produced, by backward decays in the center of mass. The {Lambda} hyperon being neutral, does not allow momentum selection. Transversely polarized protons, produced by the decay of {Lambda} particles must be identified by tagging hodoscopes at an intermediate focus in the proton beam line. The use of {Sigma}{sup +} hyperons to produce polarized protons was first suggested by Rafil Rzaev, a visitor to Fermilab from Serpukhov. He was primarily concerned with the existing 200 GeV polarized beam in the Fermilab meson area. Since then interest has been shown in polarized protons by other experimental collaborations. These experiments are at the ends of beam lines in existing tunnels. These tunnels are curved an are well suited to a {Sigma}{sup +} produced polarized proton beam which has a net band. The expected fluxes and backgrounds for the beam are discussed here. 2 refs.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5439542
• Report Number(s): FNAL/C-89/216; CONF-8909270--1; ON: DE90003344
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS
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645100* -- High Energy Physics-- Particle Interactions & Properties-Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BEAMS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HYPERONS
LAMBDA BARYONS
LAMBDA PARTICLES
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLE DECAY
POLARIZED BEAMS
PRODUCTION
PROTON BEAMS
SIGMA BARYONS
SIGMA PARTICLES
STRANGE PARTICLES