Speaker
Description
A new scheme for the hadron spectroscopy is put forward. By
assumption, the form of spectrum is dictated by the trace of
energy momentum tensor in QCD. This provides the relativistic and
renormalization invariance of hadron masses. The schema is applied
to the light mesons. Two complementary interpretations of hadron
states emerge. The first one represents an "atomic" structure of
resonances, in which the quanta of non-perturbative gluon
contributions are quantified via an effective formation of
quasiparticles representing gluon analogues of positronium. This
picture allows to build a "periodic table of hadronic elements",
i.e. to classify the hadron states, in some sense, in analogy with
Mendeleev table in Chemistry. The Regge spin and radial
trajectories appear in a natural way and without use of
non-relativistic notion of orbital momentum or any semiclassical
quantization conditions. The second interpretation is based on a
"collisional" nature of some (or many) hadrons. This picture suits
better for explaining the decay modes and isospin. In particular,
it leads to a simple explanation of the scalar sector below 1~GeV
with correct masses and decay modes.
