Study of the pseudoscalar glueball in J/psi radiative decays

doi:10.1103/PhysRevD.100.054511

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	Study of the pseudoscalar glueball in J/psi radiative decays
	Gui, Long-Cheng ; Dong, Jia-Mei ; Chen, Ying 4,5; Yang, Yi-Bo
刊名	PHYSICAL REVIEW D
	2019
卷号	100 期号:5 页码:54511
关键词	CLOVER WILSON ACTION
ISSN号	2470-0010
DOI	10.1103/PhysRevD.100.054511
英文摘要	We aim to explore the production rate of the pseudoscalar glueball in J/psi radiative decay by lattice quantum chromodynamics in quenched approximation. The calculation is performed on three anisotropic lattices with the spatial lattice spacing ranging from 0.222(2) fm to 0.110(1) fm. As a calibration of some systematical uncertainties, we first extract the M1 form factor (V) over cap (0) of the process J/psi -> gamma eta(c) and get the result (V) over cap (0) = 1.933(41) in the continuum limit, which gives the partial width Gamma(J/psi -> gamma eta(c)) = 2.47(11) keV. These results are in agreement with that of previous lattice studies. As for the pseudoscalar glueball G(0)-+, its mass is derived to be 2.395(14) GeV, and the form factor (V) over cap (0) of the process J/psi -> gamma G(0)-+ is determined to be (V) over cap (0) = 0.0246(43) after continuum extrapolation. Finally, the production rate of the pseudoscalar glueball is predicted to be 2.31(90) x 10(-4), which is much smaller than that of conventional light q (q) over bar eta states. After the subtraction of the phase space factor, the couplings of J/psi X gamma are similar where X stands for eta states and the pseudoscalar glueball. Possibly, the U-A(1) anomaly plays an important role for the large couplings of gluons to the flavor singlet eta states in J/psi radiative decays.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27098]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 2.Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China 3.Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China 4.Hunan Normal Univ, SICQEA, Changsha 410081, Hunan, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gui, Long-Cheng,Dong, Jia-Mei,Chen, Ying,et al. Study of the pseudoscalar glueball in J/psi radiative decays[J]. PHYSICAL REVIEW D,2019,100(5):54511.
APA	Gui, Long-Cheng,Dong, Jia-Mei,Chen, Ying,&Yang, Yi-Bo.(2019).Study of the pseudoscalar glueball in J/psi radiative decays.PHYSICAL REVIEW D,100(5),54511.
MLA	Gui, Long-Cheng,et al."Study of the pseudoscalar glueball in J/psi radiative decays".PHYSICAL REVIEW D 100.5(2019):54511.