Search for new hadronic decays of hc and observation of hc →K+K-π+π-π0

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Research output: Contribution to journalArticlepeer-review

Abstract

Ten hadronic final states of the hc decays are investigated via the process ψ(3686)→π0hc, using a data sample of (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector. The decay channel hc→K+K-π+π-π0 is observed for the first time and has a measured significance of 6.0σ. The corresponding branching fraction is determined to be B(hc→K+K-π+π-π0)=(3.3±0.6±0.6)×10-3 (where the uncertainties are statistical and systematic, respectively). Evidence for the decays hc→π+π-π0η and hc→KS0K±π∓π+π- is found with a significance of 3.6σ and 3.8σ, respectively. The corresponding branching fractions (and upper limits) are obtained to be B(hc→π+π-π0η)=(7.2±1.8±1.3)×10-3 (<1.8×10-2) and B(hc→KS0K±π∓π+π-)=(2.8±0.9±0.5)×10-3 (<4.7×10-3). Upper limits on the branching fractions for the final states hc→K+K-π0, K+K-η, K+K-π+π-η, 2(K+K-)π0, K+K-π0η, KS0K±π∓, and pp¯π0π0 are determined at a confidence level of 90%.

Original languageEnglish (US)
Article number112007
JournalPhysical Review D
Volume102
Issue number11
DOIs
StatePublished - Dec 9 2020

Bibliographical note

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 Research and Development Program of China under Contracts No. 2020YFA0406300 and No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11935015, No. 11935016, No. 11935018, and No. 11961141012; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263 and No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003 and No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Contract No. Marie Sklodowska-Curie grant agreement No 894790; German Research Foundation DFG under Contract No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; U. S. Department of Energy under Contracts No. DE-FG02-05ER41374 and No. DE-SC-0012069.

Publisher Copyright:
© 2020 authors. Published by the American Physical Society.

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