主 讲 人 ：刘占伟     副教授

活动时间：09月27日15时00分    

地   点 ：理科2号楼B409

讲座内容：

Drawing on experimental data for baryonresonances, Hamiltonian effective field theory (HEFT) is used to predict thepositions of the finite-volume energy levels to be observed in lattice QCDsimulations. We have studied the low-lying baryons N*(1535), N*(1440), andLambda(1405). In the initial analysis, the phenomenological parameters of theHamiltonian model are constrained by experiment and the finite-volumeeigenstate energies are a prediction of the model. The agreement between HEFTpredictions and lattice QCD results obtained at finite volume is excellent.These lattice results also admit a more conventional analysis where thelow-energy coefficients are constrained by lattice QCD results, enabling adetermination of resonance properties from lattice QCD itself. The role andimportance of various components of the Hamiltonian model are examined in thefinite volume. The analysis of the lattice QCD data can help us to understandthe structure of these states better.

主讲人介绍：

刘占伟博士，现任兰州大学物理学院副教授。2004-2008期间在兰州大学获得学士学位，2008-2013期间在北京大学获得博士学位，2013-2016期间在澳大利亚阿德莱德大学从事博士后研究，2016年起任职于兰州大学物理学院。研究方向为手征有效场论，及其在强子物理和格点计算中的广泛应用。