Abstract
The cross-sections of [Formula: see text] and [Formula: see text] have been measured by Belle experiment. A resonance [Formula: see text] is observed in [Formula: see text] decay mode, while another resonance [Formula: see text] is observed in [Formula: see text] decay mode. The two resonances [Formula: see text] and [Formula: see text]’s parameters are consistent with each other, so a combined fit is performed to the two cross-sections assuming [Formula: see text] and [Formula: see text] are same resonance. [Formula: see text]’s parameters are determined to be [Formula: see text], [Formula: see text], where the first uncertainties are statistical and the second systematic. The ratio [Formula: see text] is also obtained and it indicates that [Formula: see text]’s main decay modes may be [Formula: see text]. We determine the lower limit of its leptonic decay width of around 40 eV, which can be compared with the theoretical expectations of different models.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call