Evidence for $e^{+}{e}^{-}\to \gamma {\chi }_{c1,2}$ at center-of-mass energies from 4.009 to 4.360 GeV

Abstract

Using data samples collected at center-of-mass energies of $\sqrt{s}$ = 4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process $e^{+}{e}^{-}\to \gamma {\chi }_{cJ}$ $(J=0,1,2)$ and find evidence for $e^{+}{e}^{-}\to \gamma {\chi }_{c1}$ and $e^{+}{e}^{-}\to \gamma {\chi }_{c2}$ with statistical significances of 3.0$\sigma$ and 3.4$\sigma$, respectively. The Born cross sections ${\sigma }^B(e^{+}{e}^{-}\to \gamma {\chi }_{cJ})$, as well as their upper limits at the 90% confidence level are determined at each center-of-mass energy.

arXiv comment8 pages, 7 figures, 3 tables

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Cited by in corpus (11)

• Doubly charmed tetraquarks in a diquark-antidiquark model
• Study of the XYZ states at the BESIII
• Observation of $e^{+}{e}^{-}\to \gamma {\chi }_{c1}$ and search for $e^{+}{e}^{-}\to \gamma {\chi }_{c0},\gamma {\chi }_{c2},$ and $\gamma {\eta }_c$ at $\sqrt{s}$ near 10.6 GeV at Belle
• Measurement of $e^{+}{e}^{-}\to \gamma {\chi }_{c0,c1,c2}$ cross sections at center-of-mass energies between 3.77 and 4.60 GeV
• Radiative hadronization: Photon emission at hadronization from quark-gluon plasma
• Measurement of $e^{+}{e}^{-}\to \gamma {\chi }_{cJ}$ via initial state radiation at Belle
• Observation of the decays ${\chi }_{cJ}\to \varphi \varphi \eta$
• Search for the ${\eta }_{c2}(1D)$ in $e^{+}{e}^{-}\to \gamma {\eta }_{c2}(1D)$ at $\sqrt{s}$ near 10.6 GeV at Belle
• Studies of Charmonium-like States at BESIII
• Recent Results on Charmonia- and Bottomonia-like Particles at Belle
• Search for $e^{+}{e}^{-}\to \gamma {\chi }_{bJ}$ ($J$ = 0, 1, 2) near $\sqrt{s}=10.746$ GeV at Belle II