Speaker
Xavier Artu
Description
Classical non-planar motions of a Y-shaped string with massless quarks provide a picture of a baryon on its leading Regge trajectory, with the same slope as for the mesons. Adding a second junction, a tetra-quark is obtained. A semi-classical quantization a la sum-over-histories leads, for each value of the total angular momentum of these objects, to discrete values of their masses and of the relative energies of the different string branches. A quantized phenomenological “diquark mass” is derived.
