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Fraction of the gluonium component in eta' and eta
Ke Hongwei 1 *,Yuan Xuhao 2,Li Xueqian 2 #
1.School of science, Tianjin University
2.School of physics, Nankai University
*Correspondence author
#Submitted by
Subject:
Funding: 重味重子的产生、衰变以及新物理的影响（No.20070055037）
Opened online: 2 April 2011
Accepted by: none
Citation: Ke Hongwei,Yuan Xuhao,Li Xueqian.Fraction of the gluonium component in eta' and eta[OL]. [ 2 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4418837
 
 
It is interesting to determine the fraction of the gluonium component in $\eta$ and $\eta'$ which has been under serious discussion for many years. Measurements on different decay and/or production modes were employed in literatures, thus larger uncertainties were unavoidable. In this paper we suggest to determine the mixing angles of $\eta-\eta'-G$ using the data of semileptonic decays of $D$ and $D_s$. We extract the mixing angles $\phi'$, $\phi_G$ and the model parameters simultaneously. Thanks to the new measurements carried out by CLEO Collaboration and there are sufficient decay modes to determine both the model parameters and mixing angles. The mixing angles from data are $\phi'=(41.5\pm2.0)^\circ$ and $\sin\phi_G=0.00\pm0.36$. Even though the central value of $\sin\phi_G$ is still zero, an upper bound is set.
Keywords:gluonium;pseudoscalar;semileptonicdecay
 
 
 

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