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arXiv · hep-ph/9512242

Sum Rules for Radiative and Strong Decays of Heavy Mesons

Chi-Keung Chow·Dan Pirjol
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Abstract

We derive two model-independent sum rules relating the transition matrix elements for radiative and strong decays of excited heavy mesons to properties of the lowest-lying heavy mesons. The sum rule for the radiative decays is an analog of the Cabibbo-Radicati sum rule and expresses the sum of the radiative widths in terms of the isovector charge radius of the ground state heavy meson. Using model-dependent estimates and heavy hadron chiral perturbation theory calculations, we show that this sum rule is close to saturation with states of excitation energies less than 1 GeV. An analog of the Adler-Weisberger sum rule gives an useful sum rule for the pionic widths of heavy excited mesons, which is used to set a model-independent upper bound on the coupling of the P-wave heavy mesons.

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Chi-Keung Chow, Dan Pirjol. 1995-12-05. Sum Rules for Radiative and Strong Decays of Heavy Mesons. https://doi.org/10.1103/physrevd.54.2063

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