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SUMMARY:Singularity structure and massless dyons of pure N = 2\, d = 4 the
 ories with SU(r+1) and Sp(2r) gauge groups - Seo\, J (McGill University)
DTSTART:20120126T120000Z
DTEND:20120126T130000Z
UID:TALK35882@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We study pure Seiberg-Witten theories with SU(r+1) and Sp(2r) 
 gauge groups with no flavors. We study singularity loci of moduli space of
  the Seiberg-Witten curve. Using exterior derivative and discriminant oper
 ators\, we can find Argyres-Douglas loci of the SW theory. We also compute
  BPS charges of the massless dyons of SU and Sp SW theory. In a detailed e
 xample of C_2=Sp(4)\, we find 6 points in the moduli space where we have 2
  massless BPS dyons\, and 3 of them give Argyres-Douglas loci. We show tha
 t BPS charges of the massless dyons jump as we go across Argyres-Douglas l
 oci\, giving an explicit example of Argyres-Douglas loci living inside the
  wall of marginal stability.\n
LOCATION:Seminar Room 1\, Newton Institute
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