Regarding the axial-vector mesons
نویسنده
چکیده
The implications of the f1(1285) − f1(1420) mixing for the K1(3P1) − K1(1P1) mixing angle is investigated. Based on the f1(1285)− f1(1420) mixing angle ∼ 50 suggested from the analysis for a substantial body of data concerning the f1(1420) and f1(1285), the masses of the K1( 3P1) and K1( 1P1) are determined to be ∼ 1307.35± 0.63 MeV and 1370.03± 9.69 MeV, respectively, which therefore suggests that theK1( P1)−K1(P1) mixing angle is about ±(59.9 ± 2.81). Also, it is found that the mass of the h 1 (1P1) (mostly of ss̄) state, about 1495.18 ± 8.82 MeV. Comparison of the predicted results and the available experimental information of the h1(1380) shows that without further confirmation on the h1(1380), the assignment of the h1(1380) as the ss̄ member of the 1P1 meson nonet may be premature.
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