4D Conformal Field Theories and Strings on Orbifolds
1998; American Physical Society; Volume: 80; Issue: 22 Linguagem: Inglês
10.1103/physrevlett.80.4855
ISSN1092-0145
AutoresShamit Kachru, Eva Silverstein,
Tópico(s)Cosmology and Gravitation Theories
ResumoWe propose correspondences between 4d quantum field theories with N=2,1,0 (super)conformal invariance and Type IIB string theory on various orbifolds. We argue using the spacetime string theory, and check using the beta functions (exactly for N=2,1 and so far at 1-loop for the gauge couplings in the N=0 case), that these theories have conformal fixed lines. The latter case potentially gives well-defined non-supersymmetric vacua of string theory, with a mechanism for making the curvature and cosmological constant small at nontrivial string coupling. We suggest a correspondence between nonsupersymmetric conformal fixed lines and nonsupersymmetric string vacua with vanishing vacuum energy.
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