https://doi.org/10.1051/epjconf/201919904013
A study of the vector meson ψ(4040)
1 Institute of Physics, Jan Kochanowski University, ul. Swietokrzyska 15, 25-406, Kielce, Poland.
2 Institute for Theoretical Physics J. W. Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany.
a e-mail: milena.soltysiak@op.pl
Published online: 1 February 2019
We investigate the well-known 
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).
© The Authors, published by EDP Sciences, 2019
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