Search for ηc (2S) →p p ¯ K+K- and measurement of χcJ →p p ¯ K+K- in ψ (3686) radiative decays

The BESIII collaboration

doi:10.1103/PhysRevD.111.072001

Search for ηc (2S) →p p ¯ K+K- and measurement of χcJ →p p ¯ K+K- in ψ (3686) radiative decays

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
Ruhr University Bochum
Chinese Academy of Sciences
Zhengzhou University
Johannes Gutenberg University Mainz
University of Turin
National Institute for Nuclear Physics
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
University of Science and Technology of China
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
Shandong University
Yunnan University
Helmholtz Institute Mainz
University of South China
University of Jinan
Liaoning 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
Fudan University
Indiana University Bloomington
University of Hawai'i at Mānoa
Suranaree University of Technology
South China Normal University
University of the Punjab
Liaoning Normal University
Hangzhou Normal University
Huangshan College
University of Groningen
Indian Institute of Technology Madras
Justus Liebig University Giessen
Qufu Normal University
Renmin University of China
Lanzhou University
Hebei University
China Center of Advanced Science and Technology World Laboratory
Sichuan University
Guangxi Normal University
Shanxi University
Central China Normal University
IBA
Henan University of Science and Technology
Henan University of Technology
Central South University
Zhejiang University
Goethe University Frankfurt
COMSATS University Islamabad
University of Perugia
Universidad de Tarapacá
Russian Research Centre Kurchatov Institute
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
Inner Mongolia University
Yantai University
Beihang University
University of Bristol
Shanxi Normal University
University of Science and Technology Liaoning

Research output: Contribution to journal › Article › peer-review

Abstract

A search for ηc(2S)→pp¯K+K-, together with measurement of branching fractions of χcJ(J=0,1,2)→pp¯K+K- in the ψ(3686)→γηc(2S) and the ψ(3686)→γχcJ radiative decays, is performed with (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. An evidence for ηc(2S)→pp¯K+K- is found, with a significance of 3.3σ. The product branching fraction of B[ψ(3686)→γηc(2S)]·B[ηc(2S)→pp¯K+K-] is determined to be (1.98±0.41stat±0.99syst)×10-7. The product branching fractions of B[ψ(3686)→γχcJ]·B[χcJ→pp¯K+K-] are measured to be (2.49±0.03stat±0.15syst)×10-5, (1.83±0.02stat±0.11syst)×10-5, and (2.43±0.02stat±0.15syst)×10-5, for J=0, 1, and 2, respectively.

Original language	English
Article number	072001
Journal	Physical Review D
Volume	111
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.111.072001
State	Published - 1 Apr 2025

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10.1103/PhysRevD.111.072001

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title = "Search for ηc (2S) →p p ¯ K+K- and measurement of χcJ →p p ¯ K+K- in ψ (3686) radiative decays",

abstract = "A search for ηc(2S)→pp¯K+K-, together with measurement of branching fractions of χcJ(J=0,1,2)→pp¯K+K- in the ψ(3686)→γηc(2S) and the ψ(3686)→γχcJ radiative decays, is performed with (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. An evidence for ηc(2S)→pp¯K+K- is found, with a significance of 3.3σ. The product branching fraction of B[ψ(3686)→γηc(2S)]·B[ηc(2S)→pp¯K+K-] is determined to be (1.98±0.41stat±0.99syst)×10-7. The product branching fractions of B[ψ(3686)→γχcJ]·B[χcJ→pp¯K+K-] are measured to be (2.49±0.03stat±0.15syst)×10-5, (1.83±0.02stat±0.11syst)×10-5, and (2.43±0.02stat±0.15syst)×10-5, for J=0, 1, and 2, respectively.",

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

note = "Publisher Copyright: {\textcopyright} 2025 authors. Published by the American Physical Society.",

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doi = "10.1103/PhysRevD.111.072001",

language = "English",

volume = "111",

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AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Afedulidis, O.

AU - Kabana, S.

AU - The BESIII collaboration

PY - 2025/4/1

Y1 - 2025/4/1

N2 - A search for ηc(2S)→pp¯K+K-, together with measurement of branching fractions of χcJ(J=0,1,2)→pp¯K+K- in the ψ(3686)→γηc(2S) and the ψ(3686)→γχcJ radiative decays, is performed with (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. An evidence for ηc(2S)→pp¯K+K- is found, with a significance of 3.3σ. The product branching fraction of B[ψ(3686)→γηc(2S)]·B[ηc(2S)→pp¯K+K-] is determined to be (1.98±0.41stat±0.99syst)×10-7. The product branching fractions of B[ψ(3686)→γχcJ]·B[χcJ→pp¯K+K-] are measured to be (2.49±0.03stat±0.15syst)×10-5, (1.83±0.02stat±0.11syst)×10-5, and (2.43±0.02stat±0.15syst)×10-5, for J=0, 1, and 2, respectively.

AB - A search for ηc(2S)→pp¯K+K-, together with measurement of branching fractions of χcJ(J=0,1,2)→pp¯K+K- in the ψ(3686)→γηc(2S) and the ψ(3686)→γχcJ radiative decays, is performed with (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. An evidence for ηc(2S)→pp¯K+K- is found, with a significance of 3.3σ. The product branching fraction of B[ψ(3686)→γηc(2S)]·B[ηc(2S)→pp¯K+K-] is determined to be (1.98±0.41stat±0.99syst)×10-7. The product branching fractions of B[ψ(3686)→γχcJ]·B[χcJ→pp¯K+K-] are measured to be (2.49±0.03stat±0.15syst)×10-5, (1.83±0.02stat±0.11syst)×10-5, and (2.43±0.02stat±0.15syst)×10-5, for J=0, 1, and 2, respectively.

UR - https://www.scopus.com/pages/publications/105001869639

U2 - 10.1103/PhysRevD.111.072001

DO - 10.1103/PhysRevD.111.072001

M3 - Article

AN - SCOPUS:105001869639

SN - 2470-0010

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IS - 7

M1 - 072001

ER -

Search for ηc (2S) →p p ¯ K+K- and measurement of χcJ →p p ¯ K+K- in ψ (3686) radiative decays

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