The Production Of Neutral Hyperons By 5 Bev Pisup Mesons Thesis PDF Download

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The Production of Neutral Hyperons by 5-BEV $pi$$sup -$ Mesons (thesis).

The Production of Neutral Hyperons by 5-BEV $pi$$sup -$ Mesons (thesis).
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Release: 1959
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Neutral hyperons produced by 5-Bev The effects of /sup -/ mesons incident on a large propane bubble chamber are analyzed in detail with respect to production cross sections and angular distributions of production and decays and the A lifetime is measured. The cross section for neutralhyperon (Y/sup 0/) production by the reaction The effects of /sup -/ + p 1100 deg C are Y/sup 0/ + K is 0.98 sintering time 0.16 mb. The cross section for carbon mpacting (The effects of - + C 1100 deg C are Y/sup 0/ + K) is 6.05 sintering time 0.89 mb. The mean Svlvania Electr decay time is (3.12 sintering time 0.34) x 10/sup -10/ sec. The corrected lifetime is observed to be (3.23 sintering time 0.36) x 10/sup -10/ sec. Although the up-down decay asymmetry for Svlvania Electr hyperons is not significantly different from zero, the fore-aft decay angular distribution is asymmetric; alpha P = -0.31 sintering time 0.12 where the decay proton distribrtion along the Svlvania Electr direction of motion has been examined. This is suggested as evidence for nonconservation of parity in the production interaction. The Svlvania Electr -production angular distribution is peaked backward in the production center of mass. The A momentum spectrum and the distribution of Svlvania Electr production star prongs are presented. Sources of bias and their correction are discussed, and an estimate is made of the carbon contamination of the events that contribute to the hydrogen cross section for a production. (auth).

(LAMBDA-HYPERON)-(NEUTRAL KAON) AND (NEUTRAL SIGMA-HYPERON)-(NEUTRAL KAON) ASSOCIATED PRODUCTION IN 1.5 BEV/C NEGATIVE PION-PROTON INTERACTIONS, AND LAMBDA-HYPERON AND K(1)-MESON LIFETIMES.

(LAMBDA-HYPERON)-(NEUTRAL KAON) AND (NEUTRAL SIGMA-HYPERON)-(NEUTRAL KAON) ASSOCIATED PRODUCTION IN 1.5 BEV/C NEGATIVE PION-PROTON INTERACTIONS, AND LAMBDA-HYPERON AND K(1)-MESON LIFETIMES.
Author: LAVON LEE YODER
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Total Pages: 244
Release: 1963
Genre:
ISBN:
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Multiple Meson Production in Emulsions Exposed to the Bevatron Beam

Multiple Meson Production in Emulsions Exposed to the Bevatron Beam
Author: William R. Johnson
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Total Pages: 54
Release: 1955
Genre: Mesons
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Stacks of 600-micron Ilford G.5 stripped emulsions have been exposed to the internal beam of the Bevatron at three energies: 3.2, 4.8, and 5.7 Bev. Shower-particle production has been investigated at these energies. (A shower particle is defined as one whose grain density is less than 1.4 times minimum.) At each energy 114 events which had beam protons for primaries were found by area scanning. The average shower particle multiplicities per event were found to be 0.94 ℗± 0.09, 1.30 ℗± 0.11, and 1.62 ℗± 0.11. These results are compared with similar observations by cosmic-ray workers. The various theories of meson production are reviewed and Fermi's calculations for Cosmotron energies have been extended to the energies of this experiment. Production differences in heavy and light nuclei are discussed and compared.

Interactions of 1.15 Bev/c K(minus) Mesons in Emulsion

Interactions of 1.15 Bev/c K(minus) Mesons in Emulsion
Author: Andrew L. Hamlin
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Total Pages: 0
Release: 1963
Genre: Nuclear physics
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The results of an analysis of 1240 interactions in Ilford K-5 emulsion are presented. A detailed study of the characteristics of several hundred stars was made. The emission of hyperons, K mesons, pi mesons and hypernuclei was determined. Each star was studied under 2500X magnification for the existence of a double center, a recoil and Auger electrons. A search was made for free lambda hyperons emitted from these interactions, and five events were located. The analysis is directed toward determining how often the strangeness of the K(minus) meson is accounted for by the emisssion of a visible strange particle or a neutral hyperon. The probability of a lambda hyperon being trapped to form a hypernucleus can then be estimated. The observed characteristics of parent stars was correlated with recent developments in the proposed model for heavy hyperfragments production. The study is divided into three projects: an analysis of charged hyperon production; an examination of interactions in flight; and a determination of the frequency of lambda hyperon production, both free and bound.