EPJ Web of Conferences (Jan 2019)

A study of the vector meson ψ(4040)

  • Piotrowska M.,
  • Giacosa F.

DOI
https://doi.org/10.1051/epjconf/201919904013
Journal volume & issue
Vol. 199
p. 04013

Abstract

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We investigate the well-known cc¯$c\overline c $ vector state ψ(4040) in the frame-work of a quantum field theoretical model. In particular, we study its spectral function and search for the pole(s) in the complex plane. Quite interestingly, the spectral function has a non-standard shape and two poles are present. The role of the meson-meson quantum loops (in particular DD* ones) is crucial and could also explain the not yet conformed “state” Y(4008).