feed ical google calendar

(1) Presentation(s)

-

Mar. 14/03/2023 14:00 Salle des Séminaires, Bâtiment 21, Etage 4 (à confirmer)

Séminaire
ISRAEL Dan (LPTHE (Paris))
A Worldsheet Approach to Heterotic Flux Compactifications with Minimal Supersymmetry

(Théorie des Interactions Fondamentales)


Sommaire:

Compactifications with torsion of the Heterotic string preserving minimal supersymmetry in four dimensions can be obtained as orbifolds of principal two-torus bundles over a K3 surface. We consider a two-dimensional worldsheet description of these backgrounds as gauged linear sigma-models (GLSMs) with (0,2) supersymmetry. Such a formulation provides a useful framework in order to address the resolution of singular orbifold geometries. We investigate the constraints imposed by discrete symmetries on the corresponding torsional GLSMs. In particular, the principal T^2 connection over K3 is inherited from (0,2) vector multiplets. As these vectors gauge global scaling symmetries of products of projective spaces, the corresponding K3 geometry is naturally realized as an algebraic hypersurface in such a product (or as a branched cover of it). I will outline the general construction and give explicit constructions for K3 automorphisms of order two and three.


Pour plus d'informations, merci de contacter Alexandrov S.