[institut] [phys4phys] Balkan String Webinar – May 8 14:00 CEST – Lorenz Eberhardt

[Mihailo Čubrović]

Dear colleagues,

This Friday, May 8,
at 14:00 CEST,
Lorentz Eberhardt (University of Amsterdam) will give an online talk 
within the Balkan String Webinar series.


Title: One-loop string amplitudes at finite energies

Abstract: I will describe a method to compute one-loop string scattering 
amplitudes at finite energies. Inspired by methods in analytic number 
theory, it rewrites the modular integral as an infinite series 
controlled by Lorentzian degeneration singularities in moduli space. I 
will illustrate the method for the type II one-loop four-graviton 
amplitude and discuss its physical content, with emphasis on the 
high-energy limit. In particular, I will show that the Gross–Mende 
saddle-point picture must be refined to include complex saddle points in 
order to reproduce the correct one-loop asymptotics. This talk is based 
on joint works with M.M. Baccianti, J. Chandra, T. Hartman and S. 
Mizera.


Link (please log in 5 min early):
https://belgrade-strings-ipb-ac-rs.zoom.us/j/6664242666?pwd=QW5UjVWFuadA4MBhB0K6wockM1OxPZ.1&omn=92396080924

Meeting ID: 666 4242 666
Passcode: 314159


Best
Mihailo

-- 
Dr. Mihailo Čubrović

Center for the Study of Complex Systems
Institute of Physics Belgrade
National Institute of the Republic of Serbia
Pregrevica 118, 11080 Belgrade, Serbia
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