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X-FROM-URL:https://eom.sdu.dk/events/ical/ff9f46f1-3a48-48f0-aa5b-4ffbb09b
 5676
X-WR-CALNAME:QM Research Seminar: Analytic Continuation of One-Loop String
  Amplitudes and its Evaluations
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TZID:Europe/Copenhagen
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DTSTAMP:20260602T163052Z
DTSTART:20261028T030000
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DTSTART:20260325T020000
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DESCRIPTION:[b]Speaker: Zhi-Zhen Wang[/b]\n(Trinity College Dublin)\n\n[b]
 Abstract:[/b]\nEberhardt-Mizera (2023) evaluated the one-loop bosonic and
  Type I open string amplitude via Rademacher method. In this talk\, we wi
 ll introduce two other different strategies to treat the modular integral
 s appearing in one-loop bosonic and Type I amplitudes of both open and cl
 osed strings\, and in particular their analytic continuation based on a s
 tring theoretic analog of the iε-prescription of quantum field theory. We
  will identify the two strategies and evaluate various zero- and two-poin
 t amplitudes. Beyond the perfect agreement to that obtained from the Rade
 macher method\, our approach further provided an exact expression as a co
 mbination of three partition functions in terms of a temperature variable
 . While each individual term depends on this variable\, the sum does not.
  In particular\, the imaginary part of the one-loop amplitude\, which acc
 ounts 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 rece
 nt work 2411.02517.
DTEND:20241210T150000Z
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DTSTART:20241210T140000Z
LOCATION:Syddansk Universitet\, Campusvej 55\, 5230\, Odense M
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SUMMARY:QM Research Seminar: Analytic Continuation of One-Loop String Ampl
 itudes and its Evaluations
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