报告题目：The Disk Partition Function in String Theory

报告人： Sridip Pal

报告时间：2021年6月9日（星期三）10：00（北京时间）

报告地点：必赢电子游戏网站中心校区物理楼302，在线报告（ZOOM ID：844 0165 6570）

报告摘要：

We investigate the disk partition function for the open string. This is a subtle problem because of the presence of a residual gauge group PSL(2,R) on the worldsheet even after fixing the conformal gauge. It naively has infinite volume and leads to a vanishing answer. We use different methods that all demonstrate that PSL(2,R) effectively behaves like a group with finite negative volume in the path integral, which leads to a simple prescription for the computation of the disk partition function. We apply our findings to give a simple rederivation of the D-brane tensions.

报告人简介：

Sridip Pal:

2020 - 2021 Institute for Advanced Studies, Princeton, United States

2015 - 2020 University of California, San Diego, San Diego, United States

2012 - 2016 Indian Institute of Science Education and Research Kolkata, Mohanpur, India

At present, it is mainly active in Physics and Astronomy, Mathematics, Earth and Planetary Sciences.

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