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

Abstract

We propose to test CP symmetry in the decay $\jp\to γϕϕ$, 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 $10^{-14}ecm$. In the near future with a $10^{10}$ data sample, these moments can be probed at order of $10^{-16}ecm$.

Misprints corrected. To appear in Phys. Lett. B

References in corpus (1)

• Measurement of the CP-Violating Asymmetry Amplitude sin2beta

Cited by in corpus (3)

• Mechanisms for ${\chi }_{cJ}\to \varphi \varphi$ Decays
• Testing Anomalous Color-Electric Dipole Moment of the c-Quark from psi'->J/psi+pi(+)+pi(-) at Beijing Spectrometer
• Precise Measurement of Chromoelectric Dipole Moment of the Charm Quark