First observations of h c → hadrons

BESIII Collaboration, Evelina Gersabeck

Research output: Contribution to journalArticlepeer-review


Based on (4.48±0.03)×108  ψ(3686) events, collected with the BESIII detector at the BEPCII storage ring, five hc hadronic decays are searched for via the process ψ(3686)→π0hc. Three of them, hc→p¯pπ+π−, π+π−π0, and 2(π+π−)π0, are observed for the first time with significances of 7.4σ, 4.6σ, and 9.1σ, and their branching fractions are determined to be (2.89±0.32±0.55)×10−3, (1.60±0.40±0.32)×10−3, and (7.44±0.94±1.52)×10−3, respectively, where the first uncertainties are statistical and the second systematic. No significant signal is observed for the other two decay modes, and the corresponding upper limits of the branching fractions are determined to be B(hc→3(π+π−)π0)<8.7×10−3 and B(hc→K+K−π+π−)<5.8×10−4 at the 90% confidence level.
Original languageEnglish
JournalPhysical Review D (Particles, Fields, Gravitation and Cosmology)
Early online date24 Apr 2019
Publication statusPublished - 2019


Dive into the research topics of 'First observations of h c → hadrons'. Together they form a unique fingerprint.

Cite this