Hadron physics at J-PARC
by Prof. Hiroaki Ohnishi (Research Center for Electron Photon Science (ELPH), Tohoku University)
at SMI - Boltzmanngasse 3, 1090 Wien ( 3-2-08 - Seminarraum )
Dynamics of elementary particles, such as quarks and gluons, are well described by the theory of the strong interaction, i.e. Quark Chromodynamics (QCD). In our universe, many varieties of matters are created by strong interaction, e.g. proton, neutron, nucleus and even neutron stars which has supper high density matter in it. However, due to the non-perturbative nature of the QCD at low energy regime, it is very hard to construct those matters directly from QCD itself. To date, lattice QCD succeeded to construct ground state baryon masses at the point where quark mass is very close to physical point, however excited hadrons are not. Thus Hadron spectroscopy and investigation of hadron-hadron interaction will be a way to reveal the information of nature in low energy QCD. One of the keys to help to understand the nature might be impurity. For baryon spectroscopy, it will be heavy quark, such as charm quark or even strange quark. For hadron-hadron interaction, it will be Kaon K+-, phi meson, Lambda and charmed meson and baryons.
In the presentation, I would like to review the goal and current situation for the hadron physics, try to introduce physics programs at J-PARC and places a few wards on the future prospective for hadron physics at J-PARC.