While the HALQCD method has become popular for obtaining hadron interactions from lattice QCD simulations, it has been often criticized for its unclear systemic uncertainties, especially the derivative expansion method to determine the potential from the Nambu-Bethe-Salpeter (NBS) wave functions. In this talk, I will use an example to demonstrate that general potentials cannot be accurately fixed by a small number of NBS wave functions. Additionally, we propose using the Ernst-Shakin-Thaler (EST) method to extract the hadron-hadron interaction from NBS wave functions. I will showcase its effectiveness using a realistic nucleon force, which is more efficient than the derivative expansion in handling very nonlocal interactions and also provides a way to estimate the systemic uncertainties of the derivative expansion.

报告人简介：

孟璐博士，2015年本科毕业于山东大学泰山学堂；2020年博士毕业于北京大学物理学院，导师朱世琳教授，曾获“北京大学优秀博士论文”奖；2020年10至今为Ruhr-Universität Bochum博士后，合作导师是Evgeny Epelbaum教授。目前的研究兴趣主要为：有限体积效应，强子奇特态，手征有效场论和夸克模型，在Physics Reports, Science Bulletin, JHEP, Physical Review D等期刊发表SCI论文35篇，引用1200余次，h因子为20.

邀请人：

郭奉坤 研究员