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Four-Quark Hadrons: an Updated Review
Angelo Esposito, Andrea L. Guerrieri, Fulvio Piccinini +2
The past decade witnessed a remarkable proliferation of exotic charmonium-like resonances discovered at accelerators. In particular, the recently observed charged states are clearl…
A note on the newly observed Y(4220) resonance
R. Faccini, G. Filaci, A. L. Guerrieri +2
BES III Collaboration has recently observed a vector resonance in the chi_{c0} omega channel, at a mass of about 4220 MeV, named Y(4220). Hints of a similar structure appear in the…
Probing the nature of Z_c states via the eta_c rho decay
A. Esposito, A. L. Guerrieri, A. Pilloni
The nature of the so-called XYZ states is a long-standing problem. It has been suggested that such particles may be described as compact four-quark states or loosely bound meson mo…
Production of Tetraquarks at the LHC
A. L. Guerrieri, F. Piccinini, A. Pilloni +1
The high prompt production cross section of X(3872) at hadron colliders has shown to be very informative about the quark nature of the X, Y, Z states. We present here a number of r…