CP Test in J/Psi -> gamma phi phi Decay

Details CP Test in J/Psi -> gamma phi phi Decay CP Test in J/Psi -> gamma phi phi Decay

2003-11-02

arxiv.org/abs/hep-ph/0311012v2

Phys.Lett. B580 (2004) 163-168

Physics

High Energy Physics

High Energy Physics - Phenomenology

Misprints corrected. To appear in Phys. Lett. B

Scientific paper

We propose to test CP symmetry in the decay $\jp\to \gamma \phi\phi$, for which large data sample exists at BESII, and a data sample of $10^{10}$ $J/\psi$'s will be collected with BESIII and CLEO-C program. We suggest some CP asymmetries in this decay mode for CP test. Assuming that CP violation is introduced by the electric- and chromo-dipole moment of charm quark, these CP asymmetries can be predicted by using valence quark models. Our work shows a possible way to get information about the electric- and chromo-dipole moment of charm quark, which is little known. Our results show that with the current data sample of $J/\psi$, electric- and chromo-dipole moment can be probed at order of $10^{-14}e cm$. In the near future with a $10^{10}$ data sample, these moments can be probed at order of $10^{-16}e cm$.

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