The small K pi component in the K* wave functions


Creative Commons License

Xiao C. W. , Aceti F., Bayar M.

EUROPEAN PHYSICAL JOURNAL A, cilt.49, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 49 Konu: 2
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1140/epja/i2013-13022-y
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL A

Özet

We use a recently developed formalism which generalizes Weinberg's compositeness condition to partial waves higher than s-wave in order to determine the probability of having a K pi component in the K* wave function. A fit is made to the K pi phase shifts in p-wave, from where the coupling of K* to K pi and the K pi loop function are determined. These ingredients allow us to determine that the K* is a genuine state, different from a K pi component, in a proportion of about 80%.