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 χ_c1(3872) → γψ_2(3823). No signal is observed and the upper limit on the ratio of branching fractions B(χ_c1(3872) → γψ_2(3823); ψ_2(3823) → γχ_c1)/B(χ_c1(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 χ_c1(3872) is the pure charmonium state χ_c1(2P).

Search for the radiative transition 𝜒𝑐⁢1⁡(3872)→𝛾⁢𝜓2⁡(3823)

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01

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 χ_c1(3872) → γψ_2(3823). No signal is observed and the upper limit on the ratio of branching fractions B(χ_c1(3872) → γψ_2(3823); ψ_2(3823) → γχ_c1)/B(χ_c1(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 χ_c1(3872) is the pure charmonium state χ_c1(2P).
2024
110
1
012012-1
012012-9
charmonium, radiative transitions
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Afedulidis, O.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2027903
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