Publication

Search for 1-+ Charmoniumlike Hybrid Via e+e- → Γη(′)ηc at Center-of-mass Energies Between 4.258 and 4.681 Gev

Yunxuan Song
2025

Abstract

Using e(+)e(-) collision data corresponding to an integrated luminosity of 10.6 fb(-1) collected at center-of-mass energies between 4.258 and 4.681 GeV with the BESIII detector at the BEPCII collider, we search for the 1(-+) charmoniumlike hybrid via e(+)e(-) -> gamma eta eta(c) and e(+)e(-) -> gamma eta 'eta(c)decays for the first time. No significant signal is observed, and the upper limits on the Born cross sections for both processes are set at the 90% confidence level.

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