Bowen Xiao (CUHK(SZ))-Understanding the Energy-Momentum Distribution with Weizsacker-Williams Method

Bowen Xiao (CUHK(SZ)) tells us about Understanding the Energy-Momentum Distribution with the Weizsacker-Williams Method

Abstract:
Gravitational Form Factors (GFFs) offer an important avenue for probing the energy-momentum and mass distribution of nucleons and nuclei. This work presents a study of photon and gluon momentum GFFs using the Weizsacker-Williams method in the context of relativistic hadrons. First, we express the photon A-GFFs in terms of charge form factors and discuss the corresponding photon radius. Furthermore, we derive an integral relation between the gluon A-GFF and the Laplacian of the dipole scattering amplitude within the small-x framework. This relation allows us to unveil the gluon energy-momentum distribution inside hadrons through measurements at the upcoming Electron-Ion Collider. Additionally, we generalize the analysis to study the A-GFF of nuclei and propose using the nuclear gluon mean square radius, together with the charge distribution, to constrain the neutron distribution for large nuclei. This work provides important insights into the energy-momentum and mass distribution of nucleons and nuclei, which are crucial for our understanding of the fundamental structure of matter and the strong interaction.

Slides:
https://drive.google.com/file/d/1RDKb...

Bio:
Prof. Bo-Wen Xiao received his Bachelor's degree from Beijing University in 2003 and his PhD from Columbia University in 2008. He then worked as a postdoc at Lawrence Berkeley National Laboratory from 2008 to 2010 and at Pennsylvania State University from 2010 to 2012. In 2012, he began his position as a professor at Central China Normal University, where he served for eight years. During 2017-2018, he was also a short-term visiting research scientist at École Polytechnique in France. Since September 2020, he has been appointed as an associate professor at CUHK(SZ).