A Theory of Hyperfragments

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"Mesic decay of hyperfragments is discussed systematically on the basis of a previous model for hyperfragments. The general formalism for the two-body and three-body mesic decay was developed. The polarization-direction correlation and the angular correlation for the two-body and the three-body decays are discussed together with the decay probability. The formalism was developed so as to include the isotopic spin selection rule ( DELTA I = 1/2 and 3/2) for the mesic decays. The theory was applied especially for the low mass number hypergragments where it was found that the branching ratios of the two-body and the three-body mesic decays … continued below

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55 pages : illustrations, tables

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Iwao, Syurei February 28, 1961.

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"Mesic decay of hyperfragments is discussed systematically on the basis of a previous model for hyperfragments. The general formalism for the two-body and three-body mesic decay was developed. The polarization-direction correlation and the angular correlation for the two-body and the three-body decays are discussed together with the decay probability. The formalism was developed so as to include the isotopic spin selection rule ( DELTA I = 1/2 and 3/2) for the mesic decays. The theory was applied especially for the low mass number hypergragments where it was found that the branching ratios of the two-body and the three-body mesic decays of /sup 3/H/sub i and /sup 4/H/sub i, (/sup 3/ H/sub i yields /sup 3/He + i/sup -/)/(/sup 3/H/sub i yields D + p+ pi /sup -/) and (/sup 4/H/sub i yields /sup 4/He + pi /sup -/)/(/sup 4/H/ sub i yields /sup 3/H + p + pi /sup -/), could be used for the determination of the spins of both hyperfragments. The fraction of the p-wave decay rate for the free LAMBDA decay obtained from the reaction /sup 5/He/sub i yields /sup 4/He + p + pi where the decay proceeds through two-resonant states (p/sub 3/2/ and p/sub 1/2/) is given by p/sup 2//(s/sup 2/ + p/sup 2/) approx equal 0.4 which gives t he spin zero of /sup 4/H/sub i in connection with the Dalitz and Liu plot and hence odd parity for the kaon. The decay rate of the charged and the neutrul modes is always 2/1 if and only if the condition obtained by Okubo, Marshak, and Sudarshan is satisfied. Finally it is shown that the final state interaction for the two-body mesic decay can be described by the pion and residual nucleus scattering phase shifts by making use of in-variance of the total S-matrix of the decay processes under the Wigner (weak) time reversal."

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55 pages : illustrations, tables

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Digitized from microopaque cards (2).

Contract no. AT(30-1)-875.

Includes bibliographical references (pages 54-55)

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  • OCLC: #
  • SuDoc Number: Y 3.At 7:22/NYO-9679
  • Report No.: NYO-9679
  • Accession or Local Control No: metadc1463637
  • Archival Resource Key: ark:/67531/metadc1463637

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  • February 28, 1961

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  • Sept. 2, 2021, 4:33 p.m.

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  • Oct. 30, 2023, 11:14 a.m.

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Iwao, Syurei. A Theory of Hyperfragments, report, February 28, 1961; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1463637/: accessed January 13, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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