Observation of Charmonium hc Radiative Decays to Multiple Light Hadrons and the Tensor State f2 (1270)

The BESIII collaboration

doi:10.1103/v4hf-s8x8

Observation of Charmonium hc Radiative Decays to Multiple Light Hadrons and the Tensor State f2 (1270)

The BESIII collaboration

Institute of Higher Research

CAS - Institute of High Energy Physics
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Uppsala University
Zhengzhou University
Chinese Academy of Sciences
Johannes Gutenberg University Mainz
University of Turin
National Institute for Nuclear Physics
University of Science and Technology of China
Southeast University, Nanjing
Joint Institute for Nuclear Research
Peking University
University of Chinese Academy of Sciences
National Centre for Nuclear Research
Mongolian Academy of Sciences
Carnegie Mellon University
University of Münster
Wuhan University
Lanzhou University
Istinye University
Nankai University
Moscow Institute of Physics and Technology
China University of Geosciences, Wuhan
Soochow University
Henan University
Nanjing University
North China Electric Power University
Tsinghua University
CAS - Institute of Modern Physics
Jilin University
Hunan University
Chung-Ang University
Fudan University
Shandong University
Yunnan University
Helmholtz Institute Mainz
Ruhr University Bochum
University of South China
University of Jinan
Liaoning University
Inner Mongolia University
Henan Normal University
Sun Yat-Sen University
University of Eastern Piedmont
Nanjing Normal University
University of Ferrara
University of Manchester
University of Oxford
GSI Helmholtz Centre for Heavy Ion Research
Guangxi University
Shandong Normal University
Indiana University Bloomington
University of Hawai'i at Mānoa
Suranaree University of Technology
South China Normal University
University of the Punjab
Hangzhou Normal University
Huangshan College
University of Groningen
Indian Institute of Technology Madras
Justus Liebig University Giessen
Qufu Normal University
Liaoning Normal University
Renmin University of China
Hebei University
China Center of Advanced Science and Technology World Laboratory
Sichuan University
Guangxi Normal University
Shanxi University
Central China Normal University
Henan University of Science and Technology
Henan University of Technology
Central South University
Zhejiang University
Goethe University Frankfurt
COMSATS University Islamabad
IBA
University of Perugia
Universidad de Tarapacá
Petersburg Nuclear Physics Institute (PNPI)
Hunan Normal University
Swiss Federal Institute of Technology Lausanne
Shanghai Jiao Tong University
Ministry of Education of the People's Republic of China
Near East University
Yantai University
Beihang University
University of Bristol
Shanxi Normal University
University of Science and Technology Liaoning

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1 Scopus citations

Abstract

Using ψ(3686)→π0hc decays from a data sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider, hc radiative decays to multiple light hadrons below 2.8 GeV/c2 - γπ+π-, γπ+π-η, γ2(π+π-), and γpp¯ - 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 hc→γf2(1270)→γπ+π- with a significance of 5.1σ. This observation represents the first instance of hc radiative decay to a tensor state.

Original language	English
Article number	241902
Journal	Physical Review Letters
Volume	134
Issue number	24
DOIs	https://doi.org/10.1103/v4hf-s8x8
State	Published - 20 Jun 2025

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10.1103/v4hf-s8x8

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title = "Observation of Charmonium hc Radiative Decays to Multiple Light Hadrons and the Tensor State f2 (1270)",

abstract = "Using ψ(3686)→π0hc decays from a data sample of (27.12±0.14){\texttimes}108 ψ(3686) events collected by the BESIII detector at the BEPCII collider, hc radiative decays to multiple light hadrons below 2.8 GeV/c2 - γπ+π-, γπ+π-η, γ2(π+π-), and γpp¯ - 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 hc→γf2(1270)→γπ+π- with a significance of 5.1σ. This observation represents the first instance of hc radiative decay to a tensor state.",

author = "M. Ablikim and Achasov, \{M. N.\} and P. Adlarson and Ai, \{X. C.\} and S. Kabana and \{The BESIII collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2025",

month = jun,

day = "20",

doi = "10.1103/v4hf-s8x8",

language = "English",

volume = "134",

journal = "Physical Review Letters",

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T1 - Observation of Charmonium hc Radiative Decays to Multiple Light Hadrons and the Tensor State f2 (1270)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ai, X. C.

AU - Kabana, S.

AU - The BESIII collaboration

N1 - Publisher Copyright: © 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2025/6/20

Y1 - 2025/6/20

N2 - Using ψ(3686)→π0hc decays from a data sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider, hc radiative decays to multiple light hadrons below 2.8 GeV/c2 - γπ+π-, γπ+π-η, γ2(π+π-), and γpp¯ - 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 hc→γf2(1270)→γπ+π- with a significance of 5.1σ. This observation represents the first instance of hc radiative decay to a tensor state.

AB - Using ψ(3686)→π0hc decays from a data sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider, hc radiative decays to multiple light hadrons below 2.8 GeV/c2 - γπ+π-, γπ+π-η, γ2(π+π-), and γpp¯ - 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 hc→γf2(1270)→γπ+π- with a significance of 5.1σ. This observation represents the first instance of hc radiative decay to a tensor state.

UR - https://www.scopus.com/pages/publications/105012804844

U2 - 10.1103/v4hf-s8x8

DO - 10.1103/v4hf-s8x8

M3 - Article

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AN - SCOPUS:105012804844

SN - 0031-9007

VL - 134

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 241902

ER -

Observation of Charmonium hc Radiative Decays to Multiple Light Hadrons and the Tensor State f2 (1270)

Abstract

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