報告題目：Analytic Continuation of One-Loop String Amplitudes and its Evaluations
報告人: 王郅臻
報告時間: 2024年12月2日上午10:00-11:00
報告地點: kaiyun開云官方網(wǎng)站犀浦校區(qū)3教X30456
摘要: Eberhardt-Mizera (2023) evaluated the one-loop bosonic and Type I open string amplitude via Rademacher method. In this talk, we will introduce two other different strategies to treat the modular integrals appearing in one-loop bosonic and Type I amplitudes of both open and closed strings, and in particular their analytic continuation based on a string theoretic analog of the iε-prescription of quantum field theory. We will identify the two strategies and evaluate various zero- and two-point amplitudes. Beyond the perfect agreement to that obtained from the Rademacher method, our approach further provided an exact expression as a computer-friendly combination of three partition functions in terms of a temperature variable. While each individual term depends on this variable, we have proved that the sum does not. In particular, the imaginary part of the one-loop amplitude, which accounts for the decay widths, has a compact analytical form. Its relation to the Regge limit will also be discussed. This talk is based on our recent work 2411.02517.
報告人簡介: 王郅臻，愛爾蘭都柏林圣三一大學(xué)
