TY - JOUR
T1 - Observation of χ c J → Λ ¯ Λ η
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Kalantar-Nayestanaki, N.
AU - Kappert, R.
AU - Kavatsyuk, M.
AU - Messchendorp, J.
AU - Rodin, V.
N1 - Funding Information:
The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Grants No. 2020YFA0406300 and No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Grants No. 12035009, No. 11875170, No. 11475090, No. 11635010, No. 11735014, No. 11835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12025502, No. 12035013, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, and No. 12192265; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Grant No. U1832207; CAS Key Research Program of Frontier Sciences under Grant No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Grant No. 758462; European Union’s Horizon 2020 research and innovation program under Marie Sklodowska-Curie grant agreement under Grant No. 894790; German Research Foundation DFG under Grant No. 443159800, Collaborative Research Center CRC 1044, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Grant No. DPT2006K-120470; National Science and Technology fund; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation under Grant No. B16F640076; STFC (United Kingdom); Suranaree University of Technology (SUT), Thailand Science Research and Innovation (TSRI), and National Science Research and Innovation Fund (NSRF) under Grant No. 160355; The Royal Society, UK under Grants No. DH140054 and No. DH160214; The Swedish Research Council; U.S. Department of Energy under Grant No. DE-FG02-05ER41374.
Publisher Copyright:
© 2022 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 - 2022/10/1
Y1 - 2022/10/1
N2 - By analyzing (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, the decays of χcJ→ΛΛ¯η (J=0, 1, and 2) are observed for the first time with statistical significances of 13.9σ, 6.7σ, and 8.2σ, respectively. The product branching fractions of ψ(3686)→γχcJ and χcJ→ΛΛ¯η are measured. Dividing by the world averages of the branching fractions of ψ(3686)→γχcJ, the branching fractions of χcJ→ΛΛ¯η decays are determined to be (2.31±0.30±0.21)×10-4, (5.86±1.38±0.68)×10-5, and (1.05±0.21±0.15)×10-4 for J=0, 1 and 2, respectively, where the first uncertainties are statistical and the second systematic.
AB - By analyzing (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, the decays of χcJ→ΛΛ¯η (J=0, 1, and 2) are observed for the first time with statistical significances of 13.9σ, 6.7σ, and 8.2σ, respectively. The product branching fractions of ψ(3686)→γχcJ and χcJ→ΛΛ¯η are measured. Dividing by the world averages of the branching fractions of ψ(3686)→γχcJ, the branching fractions of χcJ→ΛΛ¯η decays are determined to be (2.31±0.30±0.21)×10-4, (5.86±1.38±0.68)×10-5, and (1.05±0.21±0.15)×10-4 for J=0, 1 and 2, respectively, where the first uncertainties are statistical and the second systematic.
UR - http://www.scopus.com/inward/record.url?scp=85142204314&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.106.072004
DO - 10.1103/PhysRevD.106.072004
M3 - Article
SN - 2470-0010
VL - 106
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - 072004
ER -