Study on Mixing of Pseudoscalar Mesons η,η′and Non-qq Meson

FANG Jian; YU Hong; SHEN QiXing

Chinese Physics C> 2000, Vol. 24> Issue(3) : 190-195

Study on Mixing of Pseudoscalar Mesons η,η′and Non-qq Meson

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China

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Abstract：
The data of radiative decays involving η, η′ and their two-photon decay process and some electromagnetic processes of the J/ψ-P+V (Pseudoscalar and Vector mesons) have been used to study the admixture of pseudoscalar mesons η,η′ and non-qq isoscalar flavor singlet (such as ι/η (1440)). The "mixing parameters of two schemes are fitted by using the method of least Squares. If we only consider the mixing of η and η′ the fitting result is not good. If the admixture of η, η′ and the non-qq mesons (represented by ι later on) has been considered the result is better. The conclusion is that the η′ may contain a few non-qq component and ι has some qq component.

References

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Baillon P et al. Nuovo Cimento, 1967, A50:393 2 Scharre D L et al. Phys. Lett., 1980, B97:329 3 Edwards C et al. Phys. Rev. Lett., 1982, 49:259; Augustin J E et al. Phys. Rev., 1990, D42:10 4 Augustin J E et al. Phys. Rev., 1992, D46:2507; BAI J Z et al (MarkIII Collaboration). Phys. Rev. Lett. , 1990,65:2507; Bertin A et al. Phys. Lett., 1995, B361:1875 Peardon M. Nucl. Phys. B.1998, 63A–C:22 6 Iwao S. Prog. Theor. Phys. , 1997, 97:3517 Seiden A et al. Phys. Rev. , 1988, D38:824 8 Rosner J L. Phys, Rev. ,1983, D27: 11019 Review of Particle Physics, Eur. Phys. J. C. 1998, 3:1–794

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FANG Jian, YU Hong and SHEN QiXing. Study on Mixing of Pseudoscalar Mesons η,η′and Non-qq Meson[J]. Chinese Physics C, 2000, 24(3): 190-195.

FANG Jian, YU Hong and SHEN QiXing. Study on Mixing of Pseudoscalar Mesons η,η′and Non-qq Meson[J]. Chinese Physics C, 2000, 24(3): 190-195. shu

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Received: 1999-01-14
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study on Mixing of Pseudoscalar Mesons η,η′and Non-qq Meson

Corresponding author: FANG Jian,

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China

Received Date: 1999-01-14
Accepted Date: 1900-01-01
Available Online: 2000-03-05

Abstract: The data of radiative decays involving η, η′ and their two-photon decay process and some electromagnetic processes of the J/ψ-P+V (Pseudoscalar and Vector mesons) have been used to study the admixture of pseudoscalar mesons η,η′ and non-qq isoscalar flavor singlet (such as ι/η (1440)). The "mixing parameters of two schemes are fitted by using the method of least Squares. If we only consider the mixing of η and η′ the fitting result is not good. If the admixture of η, η′ and the non-qq mesons (represented by ι later on) has been considered the result is better. The conclusion is that the η′ may contain a few non-qq component and ι has some qq component.