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：bwin必赢登录入口官网中心校区物理楼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：

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