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SUMMARY:Supergravedad estándard en D=11 como teoría de Chern-Simons
DTSTART;VALUE=DATE-TIME:20110628T130000Z
DTEND;VALUE=DATE-TIME:20110628T140000Z
DTSTAMP;VALUE=DATE-TIME:20260626T065124Z
UID:indico-event-1801@indico.ific.uv.es
DESCRIPTION:We probe the relationship between two supergravity theories in
  eleven-dimensional spacetime: the “standard” 1978 theory of Cremmer\, J
 ulia and Scherk (CJS) and osp(32|1)-based Chern–Simons (CS) supergravity\
 , as first put forward by Troncoso and Zanelli in 1997. The comparison is 
 carried out at the Lagrangian level for both theories\, which is nontrivia
 l because\, when written in a way suitable for our purposes\, the CS Lagra
 ngian has roughly a thousand terms. We find that the CS Lagrangian can be 
 cast as a polynomial in 1/l\, where l is a length\, and that the CJS Lagra
 ngian may appear only as one distinct term. For the particular case when t
 he CJS three-form A3 and the CS five-index one-form vanish\, the match bet
 ween both Lagrangians turns out to be almost complete. This matching sheds
  new light on the long-standing issue of the gauge-theory structure of CJS
  supergravity\, since the CS supergravity Lagrangian defines a true gauge 
 system in the fiber-bundle sense. We also provide a general ansatz for A3 
 in terms of the CS fields. Solving the full comparison\, with nonvanishing
  A3 and babcde\, is important in deciding which rôle could CS supergravit
 y theories play in the context of M Theory.\n\nhttps://indico.ific.uv.es/e
 vent/1801/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1801/
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