The process $e^{+}{e}^{-}\to \pi \pi X(3823)$ in the soft pion limit

Abstract

The production of the resonance $X(3823)$, identified as the charmonium ${}^3{D}_2$ state, in the process $e^{+}{e}^{-}\to \pi \pi X(3823)$ has been recently reported by BESIII. It is pointed out that this process is fully described, up to one overall coupling constant, in the soft pion limit. An interpretation of the available and possible future data within the discussed theoretical framework may reveal new features of the charmoniumlike states. In particular, the observed relative yield for this process at different energies strongly suggests a very significant enhancement of the amplitude at the charmoniumlike peak near 4.36\,GeV.

7 pages, 2 figures

References in corpus (8)

• Observation of a charged charmoniumlike structure Z_c(4020) and search for the Z_c(3900) in e+e- to pi+pi-h_c
• Charmonium
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• Evidence of a new narrow resonance decaying to ${\chi }_{c1}\gamma$ in $B\to {\chi }_{c1}\gamma K$
• Y(4260) and Y(4360) as mixed hadrocharmonium
• Observation of the $\psi (1^3{D}_2)$ state in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma {\chi }_{c1}$ at BESIII
• Heavy quark spin symmetry breaking in near-threshold $J^{PC}=1^{--}$ quarkonium-like resonances
• Combined fit to BaBar and Belle data on e+e- to pi+pi- psi(2S)

Cited by in corpus (5)

• The hidden-charm pentaquark and tetraquark states
• Using $X(3823)\to J/\psi {\pi }^{+}{\pi }^{-}$ to identify coupled-channel effects
• The electromagnetic decays of $X(3823)$ as the ${\psi }_2(1^3{D}_2)$ state and its radial excited states
• Annihilation Rates of ${}^3{D}_2(2^{--})$ and ${}^3{D}_3(3^{--})$ Heavy Quarkonia
• Study of $e^{+}{e}^{-}\to D^{+}{D}^{-}{\pi }^{+}{\pi }^{-}$ at center-of-mass energies from 4.36 to 4.60 GeV