Radial excitation states of η and η' in the chiral quark model

CHEN Shao-Na; PING Jia-Lun

doi:10.1088/1674-1137/36/8/001

Chinese Physics C> 2012, Vol. 36> Issue(8) : 681-690 DOI: 10.1088/1674-1137/36/8/001

Radial excitation states of η and η' in the chiral quark model

CHEN Shao-Na ,
PING Jia-Lun ^,

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A chiral quark model is applied to calculate the spectra of pseudoscalar mesons η and η'. By analyzing the obtained spectra, we find that the mesons η'(2¹S₀), η(4¹S₀), η'(3¹S₀) and η'(4¹S₀) are the possible candidates of η(1760), X(1835), X(2120) and X(2370). The strong decay widths of these pseudoscalars to all the possible two-body decay channels are calculated within the framework of the ³P₀ model. Although the total width of η'(2¹S₀) is compatible with the BES Collaboration's experimental value for η(1760), the partial decay width to ωω is too small, which is not consistent with the BES result. If X(1835) is interpreted as η(4¹S₀), the total decay width is compatible with the experimental data, and the main decay modes will be mπ a₀(980) and m π a₀(1450), which needs to be checked experimentally. The assignment of X(2120) and X(2370) to η'(3¹S₀) and η'(4¹S₀) is disfavored in the present calculation because of the incompatibility of the decay widths.

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CHEN Shao-Na and PING Jia-Lun. Radial excitation states of η and η' in the chiral quark model[J]. Chinese Physics C, 2012, 36(8): 681-690. doi: 10.1088/1674-1137/36/8/001

CHEN Shao-Na and PING Jia-Lun. Radial excitation states of η and η' in the chiral quark model[J]. Chinese Physics C, 2012, 36(8): 681-690. doi: 10.1088/1674-1137/36/8/001 shu

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Received: 2011-11-15
Revised: 2012-01-18

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Radial excitation states of η and η' in the chiral quark model

Corresponding author: PING Jia-Lun,

Received Date: 2011-11-15

Accepted Date: 2012-01-18

Available Online: 2012-08-05

Abstract: A chiral quark model is applied to calculate the spectra of pseudoscalar mesons η and η'. By analyzing the obtained spectra, we find that the mesons η'(2¹S₀), η(4¹S₀), η'(3¹S₀) and η'(4¹S₀) are the possible candidates of η(1760), X(1835), X(2120) and X(2370). The strong decay widths of these pseudoscalars to all the possible two-body decay channels are calculated within the framework of the ³P₀ model. Although the total width of η'(2¹S₀) is compatible with the BES Collaboration's experimental value for η(1760), the partial decay width to ωω is too small, which is not consistent with the BES result. If X(1835) is interpreted as η(4¹S₀), the total decay width is compatible with the experimental data, and the main decay modes will be mπ a₀(980) and m π a₀(1450), which needs to be checked experimentally. The assignment of X(2120) and X(2370) to η'(3¹S₀) and η'(4¹S₀) is disfavored in the present calculation because of the incompatibility of the decay widths.

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Radial excitation states of η and η' in the chiral quark model

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