We calculate the coupling constants [Formula presented] and [Formula presented] using QCD sum rules in the presence of an external meson field. A covariant derivative is introduced within the [Formula presented] interpolating field so that in the nonrelativistic limit the field dominantly reduces to two quarks in the [Formula presented]-wave state and one quark in the [Formula presented]-wave state. Our result for the couplings obtained by further making use of the soft-meson theorem qualitatively agrees with its phenomenological value extracted from the [Formula presented](1535) decay width. The prediction for the couplings, however, depends on the value of the quark-gluon condensate [Formula presented] which is also important in the calculation of the [Formula presented](1535) mass itself within the sum rule approach.
|Number of pages||4|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 1997|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)