Observation of X(2370) and search for X(2120) in - BESIII Collaboration

2020 
Using a sample of events collected with the BESIII detector, we perform a study of . X (2370) is observed in the invariant-mass distribution with a statistical significance of . Its resonance parameters are measured to be and . The product branching fractions for and are determined to be and , respectively. No evident signal for X (2120) is observed in the invariant-mass distribution. The upper limits for the product branching fractions of and are determined to be and at the 90% confidence level, respectively.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    23
    References
    8
    Citations
    NaN
    KQI
    []