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Strange axial-vector mesons mixing angle

De-Min Li·Zhen Li
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Abstract

The masses of the $K_1(^3P_1)$ and $K_1(^1P_1)$ are considered in a nonrelativistic constituent quark model, and the absolute value of the $K_1(^3P_1)-K_1(^1P_1)$ mixing angle is determined to be about $59.29^\circ$. Comparison of the theoretical predictions on the strong decay widths of the $K_1(1270)$ and $K_1(1400)$ in the $^3P_0$ decay model as well as the production ratio of these two states in the $τ$ decay between the available experimental data strongly favors that the $K_1(^3P_1)-K_1(^1P_1)$ mixing angle is about $+59.29^\circ$.

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De-Min Li, Zhen Li. 2006-06-29. Strange axial-vector mesons mixing angle. https://doi.org/10.1140/epja%2Fi2006-10067-y

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