Utilizing a dataset of 6.7 fb−1 from electron-positron collisions recorded by the BESIII detector at the BEPCII storage ring, a search is conducted for the processes eþe− → φχc0 and φηc2(1D) across center-of-mass energies from 4.47 to 4.95 GeV. In the absence of any significant signals, upper limits are set. These include limits on the dressed cross sections for eþe− → φχc0, as well as the product of the dressed cross section for eþe− → φηc2(1D) and a sum of five branching fractions. Furthermore, the product of the electronic width of Y(4660) and the branching fraction of the Y(4660)→φχc0 is determined to be <0.35 eV at the 90% confidence level.
Search for e + e − → φχ c0 and φηc2(1D) at center-of-mass energies from 4.47 to 4.95 GeV
Garzia, I.;
2025
Abstract
Utilizing a dataset of 6.7 fb−1 from electron-positron collisions recorded by the BESIII detector at the BEPCII storage ring, a search is conducted for the processes eþe− → φχc0 and φηc2(1D) across center-of-mass energies from 4.47 to 4.95 GeV. In the absence of any significant signals, upper limits are set. These include limits on the dressed cross sections for eþe− → φχc0, as well as the product of the dressed cross section for eþe− → φηc2(1D) and a sum of five branching fractions. Furthermore, the product of the electronic width of Y(4660) and the branching fraction of the Y(4660)→φχc0 is determined to be <0.35 eV at the 90% confidence level.| File | Dimensione | Formato | |
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PhysRevD.111.012016.pdf
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