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arXiv · 1202.3042

Testing Anomalous Color-Electric Dipole Moment of the c-Quark from psi'->J/psi+pi(+)+pi(-) at Beijing Spectrometer

Yu-Ping Kuang·Jian-Ping Ma·Otto Nachtamnn·Wan-Peng Xie·Hui-Huo Zheng
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Abstract

If the c-quark has an anomalous color-electric dipole moment (CEDM), it may serve as a new source of CP violation. The strength of such a CP violation depends on the size of the CEDM, d'_c. We propose two effective ways of testing it from the large sample of psi'->J/psi+pi(+)+pi(-) at the Beijing Spectrometer, and the obtained result, |d'_c|<3X10^{-14} e cm (95% C.L.), gives the first experimentally determined upper bound on the CEDM of the c quark.

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Yu-Ping Kuang, Jian-Ping Ma, Otto Nachtamnn, Wan-Peng Xie, Hui-Huo Zheng. 2012-04-19. Testing Anomalous Color-Electric Dipole Moment of the c-Quark from psi'->J/psi+pi(+)+pi(-) at Beijing Spectrometer. https://doi.org/10.1103/physrevd.85.114010

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