PT Journal
AU Wang, E
   Xie, JJ
   Geng, LS
   Oset, E
TI The X(4140) and X(4160) resonances in the e(+)e(-) -> gamma J/psi phi reaction
SO Chinese Physics C
JI Chin. Phys. C
PY 2019
BP 113101 - 10pp
VL 43
IS 11
DI 10.1088/1674-1137/43/11/113101
LA English
DE X(4140); J/psi phi scattering; heavy flavor hadrons; X(4160)
AB We investigate the J/psi phi invariant mass distribution in the e(+)e(-) -> gamma J/psi phi reaction at a center-of-mass energy of root s = 4.6 GeV measured by the BESIII collaboration, which concluded that no significant signals were observed for e(+)e(-) -> gamma J/psi phi because of the low statistics. We show, however, that the J/psi phi invariant mass distribution is compatible with the existence of the X(4140) state, appearing as a peak, and a strong cusp structure at the D-s*(D) over bar (s)* threshold, resulting from the molecular nature of the X(4160) state, which provides a substantial contribution to the reaction. This is consistent with our previous analysis of the B+ -> J psi phi K+ decay measured by the LHCb collaboration. We strongly suggest further measurements of this process with more statistics to clarify the nature of the X(4140) and X(4160) resonances.
ER