Summary
The reaction\(\bar K\)⋆4He→Λ⋆π−⋆3He He with the formation of the YY *1 resonance in the intermediate state is discussed. A kind of the impulse approximation is used with thet-matrix of the Breit-Wigner form corresponding to the P3/2 wave of the YY *1 . The reaction rates are calculated for the capture at rest with the relativistic pion kinematics. The calculated3He and pion-momentum distributions agree reasonably well with the data. The angular distribution of the three final-state particles and the problem of the Λ-3He final-state distortion are discussed.
Riassunto
Si discute la reazione\(\bar K\)⋆4He→Λ⋆π−⋆3He He con formazione della risonanza Y *1 nello stato intermedio. Si usa un tipo di approssimazione dell’impulso in cui la matricet della formula di Breit-Wigner corrisponde all’onda P3/2 dell’Y *1 . Si calcolano i rapporti di reazione per la cattura in quiete con cinematica relativistica del pione. Le distribuzioni dell’impulso del3He e del π concordano abbastanza bene con i dati. Si discute la distribuzione angolare delle tre particelle dello stato finale ed il problema della distorsione dello stato finale Λ-3He.
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References
Helium Bubble Chamber Collaboration Group:Nuovo Cimento,20, 724 (1961); cf. alsoProc. Annual Intern. Conference on High-Energy Physics at Rochester (1960), p. 419, 423.
M. M. Block:Nuovo Cimtnto,20, 715 (1961).
J. S. Dowker:Nuovo Cimento,20, 182 (1961).
G. F. Chew andF. E. Low:Phys. Rev.,413, 1640 (1959).
J. S. Dowker:Nuovo Cimento,22, 218 (1961).
M. Alston andM. Ferro-Luzzi:Rev. Mod. Phys.,33, 416 (1961).
E. H. Dalitz andB. W. Downs:Phys. Rev., 111, 967 (1958).
R. Ely, S. Fung, G. Gidal, Y. Pau, W. Powell andH. White:Phys. Rev. Lett.,7, 461 (1961).
L. Bertanza, V. Brisson, P. L. Connolly, E. L. Hart, I. S. Mitra, G. C. Moneti, R. R. Ran, N. P. Samios, I. O. Skillicorn, S. S. Yamamoto, M. Goldberg, J. Leitner, S. Lichtman andJ. Westgam:Phys. Rev. Lett.,10, 176 (1963).
J. D. Shafer, J. J. Murray andD. O. Huwe:Phys. Rev. Lett.,10, 179 (1963).
R. H. Dalitz:Ann. Rev. Nucl. Sci.,13, 339 (1963).
M. Roos:Phys. Lett.,8, 1 (1964).
S. Abidi andB. Mohanty:Proc. Phys. Soc., A81, 470 (1963).
A. Salam:Proc. Phys. Soc., A80, 13 (1962).
G. R. Lynch:Proc. Phys. Soc., A80, 46 (1962).
J. Irving:Phil. Mag.,42, 338 (1951).
B. Bruno:Ark. Mat. Astr. Fys., A36, Nr. 8 (1948).
E. Abers andC. Zemach:Phys. Rev.,131, 2305 (1963).
J. Auman, M. M. Block, K. Gessaroli, J. Kopelman, S. Ratti, L. Grimellini, T. Kikuchi, L. Lendinara, L. Monari andE. Harth:Internat. Confer. High-Energy Physics at CERN (1962), p. 330.
R. Karplus andL. S. Rodberg:Phys. Rev.,115, 1058 (1959);T. Kotani andM. Ross:Nuovo Cimento,14, 1282 (1959) andL. B. Okun andM. I. Shmushkevitch:Žurn. Éksp. Teor. Fiz.,30, 979 (1956).
O. Dahl, N. Horwitz, D. H. Miller, J. J. Murray andP. G. White:Phys. Rev. Lett.,6, 142 (1961);R. Chand:Nuovo Cimento,31, 827 (1964);
J. Benveniste andB. Cork:Phys. Rev.,89, 422(1953).
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Sawicki, J. Three-body final states from\(\bar K\) capture in helium four and the P3/2 resonance Y *11 - Icapture in helium four and the P3/2 resonance Y *11 - I. Nuovo Cim 33, 361–371 (1964). https://doi.org/10.1007/BF02750199
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DOI: https://doi.org/10.1007/BF02750199