TY - JOUR

T1 - Observation of Charmonium h_{c} Radiative Decays to Multiple Light Hadrons and the Tensor State f_{2}(1270)

AU - BESIII Collaboration

AU - Achasov, M. N.

AU - Nikolaev, I. B.

AU - Su, S. S.

AU - Мучной, Николай Юрьевич

PY - 2025/6/17

Y1 - 2025/6/17

N2 - Using ψ(3686)→π^{0}h_{c} decays from a data sample of (27.12±0.14)×10^{8}  ψ(3686) events collected by the BESIII detector at the BEPCII collider, h_{c} radiative decays to multiple light hadrons below 2.8  GeV/c^{2}-γπ^{+}π^{-}, γπ^{+}π^{-}η, γ2(π^{+}π^{-}), and γpp[over ¯]-are observed for the first time, each with a significance greater than 5σ. The corresponding branching fractions are measured. Furthermore, intermediate states are investigated, leading to the first observation of the decay process of h_{c}→γf_{2}(1270)→γπ^{+}π^{-} with a significance of 5.1σ. This observation represents the first instance of h_{c} radiative decay to a tensor state.

AB - Using ψ(3686)→π^{0}h_{c} decays from a data sample of (27.12±0.14)×10^{8}  ψ(3686) events collected by the BESIII detector at the BEPCII collider, h_{c} radiative decays to multiple light hadrons below 2.8  GeV/c^{2}-γπ^{+}π^{-}, γπ^{+}π^{-}η, γ2(π^{+}π^{-}), and γpp[over ¯]-are observed for the first time, each with a significance greater than 5σ. The corresponding branching fractions are measured. Furthermore, intermediate states are investigated, leading to the first observation of the decay process of h_{c}→γf_{2}(1270)→γπ^{+}π^{-} with a significance of 5.1σ. This observation represents the first instance of h_{c} radiative decay to a tensor state.

UR - https://www.mendeley.com/catalogue/b90f350c-0c16-3044-868f-9f03ed53b942/

U2 - 10.1103/v4hf-s8x8

DO - 10.1103/v4hf-s8x8

M3 - Article

C2 - 40742926

VL - 134

SP - 241902

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 24

ER -