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arXiv · 1608.07947

Open charm contributions to the E1 transitions of $\psi(3686)$ and $\psi(3770)\to \gamma\chi_{cJ}$

Zheng Cao·Martin Cleven·Qian Wang·Qiang Zhao
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Abstract

The E1 transitions of $\psi(3686)$ and $\psi(3770)\to \gamma\chi_{cJ}$ are investigated in a non-relativistic effective field theory (NREFT) where the open charm effects are included systematically as the leading corrections. It also allows a self-consistent inclusion of the $S$-$D$ mixing in the same framework. We are able to show that the open charm contributions are essential for understanding the significant discrepancies between the non-relativistic leading order calculations and the experimental data.

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Zheng Cao, Martin Cleven, Qian Wang, Qiang Zhao. 2016-08-29. Open charm contributions to the E1 transitions of $\psi(3686)$ and $\psi(3770)\to \gamma\chi_{cJ}$. https://doi.org/10.1140/epjc%2Fs10052-016-4448-3

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