CP test in J/ ψ→ γφφ decay
Abstract
We propose to test CP symmetry in the decay J/ψ→γφφ, for which large data sample exists at BESII, and a data sample of 1010J/ψ'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/ψ, electric- and chromo-dipole moment can be probed at order of 10-13 e cm. In the near future with a 1010 data sample, these moments can be probed at order of 10-14 e cm.
- Publication:
-
Physics Letters B
- Pub Date:
- February 2004
- DOI:
- 10.1016/j.physletb.2003.11.059
- arXiv:
- arXiv:hep-ph/0311012
- Bibcode:
- 2004PhLB..580..163M
- Keywords:
-
- 11.30.Er;
- 13.25.Gv;
- Charge conjugation parity time reversal and other discrete symmetries;
- Decays of J/psi Upsilon and other quarkonia;
- High Energy Physics - Phenomenology
- E-Print:
- Misprints corrected. To appear in Phys. Lett. B