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SUMMARY:Symmetries from wall crossing in K3 string theories - Roberto Volp
 ato - Padua
DTSTART:20170316T130000Z
DTEND:20170316T140000Z
UID:TALK71114@talks.cam.ac.uk
CONTACT:Kenny Wong
DESCRIPTION:I will consider a large class of four dimensional N=4 string m
 odels obtained from compactifications of type II string theory on K3 x T^2
  and orbifolds thereof. I will show that the multiplicities of 1/4 BPS sta
 tes in such models can be determined (almost) uniquely by imposing some si
 mple consistency condition. The main ingredient in this derivation is a ca
 reful analysis of the wall crossing phenomenon. These results lead to a be
 tter understanding of the action of discrete groups of symmetries on the B
 PS spectrum of K3 string models and might shed some light on the mysteriou
 s Umbral moonshine conjectures. This talk is based on joint work with Nata
 lie Paquette and Max Zimet.
LOCATION:Potter Room (first floor\, Pav. B)
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