A very broad X(4260) and the resonance parameters of the 3D vector charmonium state

Details A very broad X(4260) and the resonance parameters of the 3D vector charmonium state A very broad X(4260) and the resonance parameters of the 3D vector charmonium state

2010-05-06

arxiv.org/abs/1005.1010v2

PhysRevLett.105,102001 (2010)

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures; version 2: 2 figures replaced

Scientific paper

10.1103/PhysRevLett.105.102001

We argue that the X(4260) enhancement contains a wealth of information on vector c-cbar spectroscopy. We discuss the shape of the X(4260) observed in the OZI-forbidden process "electron-positron into J/psi and a pair of charged pions", in particular at and near vector charmonium resonances as well as open-charm threshold enhancements. The resulting very broad X(4260) structure does not seem to classify itself as a vector charmonium resonance, but its detailed shape allows to identify new vector c-cbar states. Here, we estimate the resonance parameters of the psi(3D) state.

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