### Abstract

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.

Original language | English |
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Pages (from-to) | 4278-4281 |

Number of pages | 4 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 56 |

Issue number | 7 |

DOIs | |

Publication status | Published - 1997 Jan 1 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)