https://doi.org/10.1140/epja/i2013-13022-y
Regular Article - Theoretical Physics
The small K π component in the K* wave functions
1
Departamento de Fısica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Apartado 22085, 46071, Valencia, Spain
2
Department of Physics, Kocaeli University, 41380, Izmit, Turkey
* e-mail: xiaochw@ific.uv.es
Received:
2
November
2012
Accepted:
10
January
2013
Published online:
13
February
2013
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 π component in the K* wave function. A fit is made to the K π phase shifts in p -wave, from where the coupling of K* to K π and the K π loop function are determined. These ingredients allow us to determine that the K* is a genuine state, different from a K π component, in a proportion of about 80%.
© SIF, Springer-Verlag Berlin Heidelberg, 2013
