报告题目：Nucleon D-term in holographic QCD
报告人：Fujita Mitsutoshi，中山大学
报告时间：2022年10月26日15:00
报告地点：吉林大学物理学院中心校区物理楼302会议室
ZOOM会议号：896 3571 4791 密码：2022
报告摘要
The D-term is one of the conserved charges of hadrons defined as the forward limit of the gravitational form factor D(t). We calculate the nucleon's D-term in a holographic QCD model in which the nucleon is described as a soliton in five dimensions. We show that the form factor D(t) is saturated by the exchanges of infinitely many 0++ and 2++ glueballs dual to transverse-traceless metric fluctuations on the Wick rotated AdS7 black hole geometry. We refer to this phenomenon as `glueball dominance', in perfect analogy to the vector meson dominance of the electromagnetic form factors. However, the value at vanishing momentum transfer D(t=0) can be interpreted as due to the exchange of pairs of pions and infinitely many vector and axial-vector mesons without any reference to glueballs. We find that the D-term is slightly negative as a result of a cancellation between the isovector and isoscalar meson contributions.
报告人简介
Fujita Mitsutoshi，2006年本科毕业于京都大学，08年硕士毕业于京都大学，11年博士毕业于京都大学，11年至17年，分别在东京大学、华盛顿大学、YITP、肯塔基大学从事博士后研究工作和访问。2017至今，为中山大学特聘研究员。研究方向为规范引力对偶，分数量子霍尔效应，夸克胶子等离子体，纠缠熵等。
举办单位：
吉林大学物理学院
吉林大学理论物理中心
