RHIC As an Exotic Particle Factory Recent Result on Pentaquark Searches Huan Z Huang Department of Physics and astronomy University of California, Los Angeles Department of Engineering Physics Tsinghua university
RHIC As an Exotic Particle Factory -- Recent Result on Pentaquark Searches Huan Z. Huang Department of Physics and Astronomy University of California, Los Angeles Department of Engineering Physics Tsinghua University
QCD Structure of Hadrons Confinement- Hadrons must be color singlet Existing Hadrons: meson-quark and anti-quark pair Baryon -three quark system q Color Configuration
QCD Structure of Hadrons Confinement – Hadrons must be color singlet ! Existing Hadrons: meson – quark and anti-quark pair Baryon – three quark system q q q q q Color Configuration
OCD Allowed State 1)ggg-Glue Ball 2)qqQQ-Tetra-quark 3) q99qQ-Penta-quark 4)qqqqqq- Di-baryons: H(uuddss), di-Q2 (ssssss) 5) Strange Quark Matter
QCD Allowed State 1) ggg – Glue Ball 2) qqQQ – Tetra-quark 3) qqqqQ – Penta-quark 4) qqqqqq – Di-baryons: H(uuddss), di-W (ssssss) 5) Strange Quark Matter
Artist's view of proton and glueball proton glueball
Artist’s View of Proton and Glueball proton glueball
Not Easy to Identify glueball 1)We do not know the mass precisely probably 1.5-2.5 Ge V/c2 2)The width is probably wide Buried in many normal quark resonance states in the same mass region
Not Easy to Identify Glueball 1) We do not know the mass precisely probably ~ 1.5-2.5 GeV/c2 2) The width is probably wide Buried in many normal quark resonance states in the same mass region !