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Calculation of hyperfine splitting in mesons using configuration interaction approach

V. Lengyel·Yu. Fekete·I. Haysak·A. Shpenik
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Abstract

The spin - spin mass splitting of light, heavy and mixed mesons are described within a good accuracy in the potential model with screened potential. We conclude that the long - distance part of the potential cannot be pure scalar and that a vector - scalar mixture is favoured. With the same parameters which gives correct average mass spectrum excellent spin - spin splittings of heavy quarkonia is obtained. The results are obtained by going beyond usually used perturbation method, namely using configuration interaction approach.

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V. Lengyel, Yu. Fekete, I. Haysak, A. Shpenik. 2000-07-10. Calculation of hyperfine splitting in mesons using configuration interaction approach. https://doi.org/10.1007/s100520100718

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