PRODUCTION OF STRANGE PARTICLES BY $pi$$sup -$-p INTERACTIONS NEAR THRESHOLD

Journal Article · Sat Feb 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.109.1358· OSTI ID:4308683

Leipuner, L B; Adair, R K

Observations have been made, in a liquid hydrogen bubble chamber, of the production and decay of strange particles produced by the interaction of 960-Mev pi /sup -/ mesons with protons. The total strange particle production cross section was measured to be 1.02 plus or minus 0.20 millibarns. The cross section is 0.58 plus or minus 0.12 millibarn for LAMBDA /sup 0/-- theta /sup 0/ production, 0.35 plus or minus 0.09 millibarn for SIGMA /sup 0/--K/sup +/ production, and is 0.09 plus or minus 0.04 millibarn for SIGMA /sup -/ -- K/sup +/ particles. Production angular distribution was peaked somewhat backwards for SIGMA /sup 0/ and LAMBDA /sup 0/ hyperons. These cross sections, together with other data, are interpreted as indicating the existence of a very strong interaction for the production of strange particles which extends over a small radius. The decay products uf the LAMBDA /sup 0/ hyperons from LAMBDA /sup 0/-- theta /sup 0/ production were preferentia lly aligned with the incoming beam, a result suggesting a spin of 3/2 for the LAMBDA /sup 0/. Lecay distributions for LAMBDA /sup 0/ particles resulting from SIGMA /sup 0/ decay, and for theta / sup 0/ mesons, were consistent with isotropy. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-12-006780
• OSTI ID: 4308683
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BEAMS
BIBLIOGRAPHY
BUBBLE CHAMBERS
CROSS SECTIONS
DECAY
ENERGY RANGE
HYDROGEN
HYPERONS
INTERACTIONS
KAONS
KAONS- PLUS
LAMBDA PARTICLES
LIQUIDS
MEASURED VALUES
MESONS
PHYSICS
PIONS
PIONS-MINUS
POLARIZATION
PRODUCTION
PROTONS
SIGMA PARTICLES
SPIN
STRANGE PARTICLES
THERMOELECTRICITY