Using 9.0 fb−1 of e+e− collision data collected at center-of-mass energies from 4.178 to 4.278 GeV with the BESIII detector at the BEPCII collider, we perform the first search for the radiative transition χc1(3872) → γψ2(3823). No signal is observed and the upper limit on the ratio of branching fractions B(χc1(3872) → γψ2(3823); ψ2(3823) → γχc1)=B(χc1(3872) → π+π−J/ψ) is set at 0.075 at the 90% confidence level. Our result contradicts theoretical predictions under the assumption that the χc1(3872) is the pure charmonium state χc1(2P).
Search for the radiative transition χc1(3872) → γψ_2(3823)
Garzia, I.;Gramigna, S.;
2024
Abstract
Using 9.0 fb−1 of e+e− collision data collected at center-of-mass energies from 4.178 to 4.278 GeV with the BESIII detector at the BEPCII collider, we perform the first search for the radiative transition χc1(3872) → γψ2(3823). No signal is observed and the upper limit on the ratio of branching fractions B(χc1(3872) → γψ2(3823); ψ2(3823) → γχc1)=B(χc1(3872) → π+π−J/ψ) is set at 0.075 at the 90% confidence level. Our result contradicts theoretical predictions under the assumption that the χc1(3872) is the pure charmonium state χc1(2P).File in questo prodotto:
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