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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-6750
DTSTART:20211215T190000Z
DTEND:20211215T200000Z
DTSTAMP:20260414T190849Z
LAST-MODIFIED:20211208T145127Z
LOCATION:Chamberlin 5280
SUMMARY:The Large Scale Structure of α' Effects in String Theory\, Th
 eory Seminar (High Energy/Cosmology)\, Andreas Schachner\, University 
 of Cambridge
DESCRIPTION:In this talk\, I discuss three approaches to deriving and 
 understanding α' effects in String Theory. I present preliminary resu
 lts of a project on completing the ten-dimensional type II effective a
 ctions at higher order in string perturbation theory. In this context\
 , I provide concrete evidence at the level of five-point superstring a
 mplitudes that the kinematics in the maximally U(1)-violating sector i
 s obtained from standard superspace integrals over sixteen fermionic c
 oordinates. This is in line with 11D superparticle amplitudes in M-the
 ory compactified on 2-tori where the well-known modular forms required
  for SL(2\,Z) invariance of type IIB arise from integrating out windin
 g modes on the torus. 
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URL:https://www.physics.wisc.edu/events/?id=6750
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