Exotic states from lattice QCD (B05)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: from 2012 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 196253076

In this project, we shall investigate the nature of the scalar mesons and charmonium-like XYZ parti-cles using lattice QCD with Nf = 2 + 1 + 1 dynamical quark flavors - based on configurations gen-erated by the European Twisted Mass Collaboration (ETMC). In the first funding period of this CRC, we have made great effort to generate the perambulators, which encode the all-to-all quark propagators, for each quark flavor and on each gauge ensemble by the use of the sophisticated distillation method. With these perambulators, quark annihilation diagrams can be elegantly dealt with. In the second funding period, we shall start with the lightest scalar mesons as well as the X(3872) states and then study the production rates of ordinary mesons in the radiative decays of J/y to identify the decay productions as either conventional mesons or exotic mesons.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 110: Symmetries and the Emergence of Structure in Quantum Chromodynamics (QCD)
• International Connection: China
• Applicant Institution: Rheinische Friedrich-Wilhelms-Universität Bonn
• Project Heads: Professor Ying Chen, Ph.D.; Professor Dr. Carsten Urbach