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UID:UW-Physics-Event-1811
DTSTART:20100512T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260407T225010Z
LAST-MODIFIED:20100510T162550Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Stability of non-BPS states in heterotic string theory\, Strin
 g Theory Seminar\, Jihye Seo\, Harvard University
DESCRIPTION:We study BPS and non-BPS states in heterotic string theory
  compactified on 4-torus. A non-BPS state can decay into a set of BPS 
 states with same total charge and smaller total mass. We organize cons
 ervation of the charges using a set of eight 16 by 16 transformation m
 atrices acting on a 16 dimensional lattice\, in order to constrain pos
 sible decay modes allowed by charge conservation. We find that a non-B
 PS state with spinor representation is rather robust against decays in
 to BPS states. We identify its huge stability region in moduli space o
 f a 4-torus\, and we prove that no other decays into BPS states are po
 ssible.  Without fine tuning\, we achieve an exact stablity for a non-
 BPS state\, and this may turn useful for string-inspired model buildin
 g.  This study on non-BPS objects and their stability may also provide
  non-trivial tests of weak-strong duality between heterotic string the
 ory compactified on 4-torus and Type IIA string theory on K3 surface.
URL:https://www.physics.wisc.edu/events/?id=1811
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