26-31 July 2021
Mexico City
Mexico/General timezone
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Contribution Parallel

Meson Spectroscopy

Study of phi(2170) at BESIII


  • Lei XIA

Primary authors


In e+e- collisions between 2 and 3 GeV, excited states of rho, omega and phi can be produced directly.  Especially the resonances around 2GeV like rho(2000), rho(2150) and \phi(2170) are not fully understood yet. Theorists describe the phi(2170) as a traditional s s-bar state, an s s-bar g hybrid, a tetraquark state, a Lambda Lambda-bar bound state, or a phi KK resonance. The predicted decay widths vary strongly depending on the assumed nature of phi(2170) (continues in 'comments' below).