报告题目：SIDIS Program at Jefferson Lab -- Interactions between experiment and theory

报 告 人：刘天博 (Jefferson Lab and Duke University)

邀 请 人：梁作堂

报告时间：12月20号, 14:30

报告地点：N7 122报告厅

报告摘要：

Semi-inclusive deep inelastic scattering (SIDIS) is one of the main processes to study transverse momentum dependent parton distributions and nucleon spin structures. Explorations have been made during last two decades. SIDIS experiments in multiple halls at 12 GeV upgraded JLab aim at unprecedented precise measurements of quark three dimensional distributions in the valence region. Global analyses including the projected data indicate the precision of TMD extractions can be improved by about one order of magnitude. A close collaboration between theorists and experimentalists is required to achieve this goal. The full theoretical framework of SIDIS is still far from a satisfactory level. Here we discuss about the power correction, which has significant contributions to low energy SIDIS experiments. Other effects such as high order corrections and threshold resummations may also be important. On the other hand, the analysis tool should be ready for the upcoming data. We develop a global analysis toolkit for TMD extractions based on the nest sampling algorithm to have more realistic estimation of fitting uncertainties. Experimentally, analyzed data are expected to give a faithful representation of nature. A laboratory directed research and development program is approved planning to construct the first universal Monte Carlo event generator using machine learning techniques to minimize theoretical bias during the data analysis. Experiences we will learn from JLab-12 SIDIS program can be applied to future EIC physics programs.

报告人简介：

        Dr. Tianbo Liu，2006-2010年北京大学本科, 2015年7月获得北京大学博士学位。随后在Duke University和JLab从事强子物理理论和实验的博士后研究. 主要研究领域涵盖: 核子自旋结构；核子三维结构, 光锥量子场理论; 并参与了JLab的SoLID强子物理实验项目