Il Nuovo Cimento A (1965-1970)

, Volume 42, Issue 4, pp 462–470 | Cite as

Y*0 (1405) couplings andK-matrix parametrizations

  • G. C. Oades
  • G. Rasche


We investigate the conditions which the energy and width of the Y*0(1405) impose on the two-channel\(\overline K \) Open image in new window and πΣ partial-waveK-matrix. One result is that the coupling ratio Open image in new window is related to the energy dependence of Open image in new window at the resonance position. We comment on variousK-matrix parametrizations and show that it is very likely thatx is 2 to 3 times larger than theSU3 singlet value.

Свяэи Y*0(1405) и параметриэацииK-матрицы


Мы исследуем условия, которые накладывают знергия и щирина Y*(1405) на двухканальную\(\overline K \) Open image in new window и πΣ парциальнуюK-матрицу. Получается, что отнощение свяэей Open image in new window свяэано с знергетической эависимостью Open image in new window в точке реэонанса. Мы рассматриваем раэличные параметриэацииK-матрицы и покаэываем, что величинаx, с очень больщой вероятностью, в 2 ÷ 3 раэа больще, чем величина дляSU3 синглета.


Si analizzano le condizioni che l’energia e l’ampiezza della risonanza Y*0(1405) impongono sulla matriceK dell’onda parziale a due canali\(\overline K \) Open image in new window e πΣ. Un risultato è che il rapporto di accoppiamento Open image in new window è collegato alla dipendenza dall’energia di Open image in new window alla posizione di risonanza. Si discutono varie parametrizzazioni della matriceK e si mostra che è molto probabile chex sia da 2 a 3 volte più grande del valore del singolettoSU3.


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Copyright information

© Società Italiana di Fisica 1977

Authors and Affiliations

  • G. C. Oades
    • 1
  • G. Rasche
    • 2
  1. 1.Institute of PhysicsAarhus UniversityAarhusDenmark
  2. 2.Institute of Theoretical PhysicsZürich UniversityZürichSwitzerland

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