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SUMMARY:Super Weyl invariance: BPS equations from heterotic worldsheets - 
 Groot Nibbelink\, S (Ludwig-Maximilians-Universitt Mnchen)
DTSTART:20120628T151500Z
DTEND:20120628T153000Z
UID:TALK38738@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:It is well-known that the beta functions on a string worldshee
 t correspond to the target space equations of motion\, e.g. the Einstein e
 quations. We show that the BPS equations\, i.e. the conditions of vanishin
 g supersymmetry variations of the space-time fermions\, can be directly de
 rived from the worldsheet. To this end we consider a heterotic worldsheet 
 model in the RNS-formulation with (2\,0) supersymmetry\, which describes a
  complex torsion target space that supports a holomorphic vector bundle. A
 fter a detailed account of its quantization and renormalization\, we estab
 lish that super Weyl anomaly cancellation implies the heterotic BPS condit
 ions: At the one loop level the geometry is required to be conformally bal
 anced and the gauge background has to satisfy the Hermitean Yang-Mills equ
 ations. \n
LOCATION:Seminar Room 1\, Newton Institute
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