New narrow resonance in the $e^{+}{e}^{-}\to \varphi \eta$ data by Belle collaboration

Abstract

Fitting the recent $e^{+}{e}^{-}\text{ra}\varphi \eta$ data by the Belle collaboration with a theoretical formula reveals, besides the dominant $\varphi (1680)$ resonance, two narrow resonances: expected $\varphi (2170)$ resonance and an unexpected resonance with the mass of about 1851 MeV. Close proximity to the $X(1835)$ resonance suggests that the new resonance may be interpreted as the $p\bar{p}$ baryonium in an excited state. Follow-up analysis found the same resonance also in $e^{+}{e}^{-}\text{ra}\omega \eta$ data by CMD-3 experiment.

Comments: 3 pages, 3 figures, Statistical significance of the new resonance estimated