Eur. Phys. J. A (2005) 26: 141-145
https://doi.org/10.1140/epja/i2005-10155-6

Original Article

Regarding the axial-vector mesons

¹ Department of Physics, Zhengzhou University, 450052, Zhengzhou, Henan, PRC
² Institute of High Energy Physics, Chinese Academy of Sciences, 100039, Beijing, PRC

Received: 30 August 2005
Accepted: 16 September 2005
Published online: 20 October 2005

Abstract

The implications of the f ₁(1285)-f ₁(1420) mixing for the K ₁(³ P ₁)- K ₁(¹ P ₁) mixing angle are investigated. Based on the f ₁(1285)-f ₁(1420) mixing angle ∼ 50^° suggested from the analysis for a substantial body of data concerning the f ₁(1420) and f ₁(1285), the masses of the K ₁(³ P ₁) and K ₁(¹ P ₁) are determined to be ∼ 1307.35±0.63 MeV and 1370.03±9.69 MeV, respectively, which therefore suggests that the K ₁(³ P ₁)- K ₁(¹ P ₁) mixing angle is about ±(59.55±2.81)^°. Also, it is found that the mass of the h ^′ ₁(¹ P ₁) (mostly of s¯) state is about 1495.18±8.82 MeV. Comparison of the predicted results and the available experimental information of the h ₁(1380) shows that without further confirmation on the h ₁(1380), the assignment of the h ₁(1380) as the s¯ member of the ¹ P ₁ meson nonet may be premature.