High Energy Soft Scattering from Lattice QCD

by Prof. Jian Liang (South China Normal University)

Monday 27 Nov 2023, 10:30 → 11:30 Asia/Shanghai

B105 (CHEP)

Understanding the asymptotic high-energy behavior of hadron-hadron total cross sections is one of the most challenging open problems in strong interaction physics. The optical theorem connects the hadron-hadron total cross sections to the hadron-hadron elastic scattering amplitudes at low transferred momentum, which is usually called the high-energy soft scattering processes. We calculate, from first principles, the Euclidean correlation functions of certain Wilson loops that can be used to reconstruct the meson-meson elastic scattering amplitudes in a functional-integral approach, and compare our results with some models. Besides, in the light of the crossing-symmetry property of the loop-loop correlation functions, an odderon exchange is clearly observed in the high-energy soft interaction of two quark dipoles.

梁剑，华南师范大学量子物质研究院研究员，博士生导师。2010年本科毕业于南开大学，2015年于中国科学院高能物理研究所获得博士学位，后在美国肯塔基大学从事博士后研究。2020年入职华南师范大学，2022年获得国家优秀青年基金资助。主要从事格点量子色动力学相关的研究工作，致力于从第一性原理出发通过大规模数值模拟研究强子结构与性质。

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