arXiv:hep-ph/9802321·v1·High Energy Physics — Phenomenology

The possible $Σ^{0}$ - $Λ$ mixing in QCD sum rules

Shi-Lin Zhu(1,2) · W.-Y.P.Hwang(3) · Ze-sen Yang(1) · ((1) Physics department, Peking Uinversity, (2) Institute of Theoretical Physics, Academia Sinica, (3) Physics department, National Taiwan University)

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Abstract

We calculate the on-shell $Σ^{0}$ - $Λ$ mixing parameter $θ$ with the method of QCD sum rule. Our result is $θ (m_{Σ^{0}}^{2}) = (-) (0.5 \pm 0.1)$ MeV. The electromagnetic interaction is not included.

The possible Σ0-Λ mixing in QCD sum rules

Abstract

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The possible $Σ^{0}$ - $Λ$ mixing in QCD sum rules

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