1. If you are a new user, please register to get an Indico account through https://login.ihep.ac.cn/registIndico.jsp. Any questions, please email us at helpdesk@ihep.ac.cn or call 88236855.
2. The name of any uploaded file should be in English or plus numbers, not containing any Chinese or special characters.
3. If you need to create a conference in the "Conferences, Workshops and Events" zone, please email us at helpdesk@ihep.ac.cn.
5-9 May 2017
湖北宜昌
Asia/Shanghai timezone
Home > Timetable > Contribution details

Contribution

Glueball spectrum from $N_f=2$ lattice QCD study on anisotropic lattices

Speakers

  • Mr. Wei SUN

Primary authors

Co-authors

Summary

The spectrum of the lowest-lying glueballs are investigated on the lattice with two flavors of degenerate quarks. We generate large ensembles of gauge configurations on anisotropic lattices at two pion masses, $m_\pi\sim650~MeV$ and $m_\pi\sim938~MeV$. We focus on the ground states of the scalar, pseudoscalar and tensor glueballs, which are measured by gluonic operators constructed from different prototypes of Wilson loops. We also investigate the pseudoscalar channel using the topological charge density as the interpolation field operator, which are defined through Wilson loops and smeared by the Wilson flow technique. The masses of the lowest state derived in this way are much lighter (around 1GeV) and compatible with the expected masses of the flavor singlet $q\bar{q}$ meson. This provides a strong hint that the operator $\epsilon_{ijk}TrB_iD_jB_k$ and the topological charge density (proportional to $Tr\mathbf{E}\cdot\mathbf{B}$) couple very differently to the glueball states and $q\bar{q}$ mesons.