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Comments on Gepner Models and Type I Vacua in String Theory
C. Angelantonj, M. Bianchi, G. Pradisi +2
We construct open descendants of Gepner models, concentrating mainly on the six-dimensional case, where they give type I vacua with rich patterns of Chan-Paton symmetry breaking an…
Twelve-Dimensional Aspects of Four-Dimensional N=1 Type I Vacua
Sergio Ferrara, Massimo Bianchi, Gianfranco Pradisi +2
Four-dimensional supergravity theories are reinterpreted in a 12-dimensional F-theory framework. The O(8) symmetry of N=8 supergravity is related to a reduction of F-theory on T_8,…
Chiral Asymmetry in Four-Dimensional Open-String Vacua
Carlo Angelantonj, Massimo Bianchi, Gianfranco Pradisi +2
Starting from the type IIB string on the Z orbifold, we construct some chiral open-string vacua with N=1 supersymmetry in four dimensions. The Chan-Paton group depends on the (quan…
Testing Theories of Gravity with a Spherical Gravitational Wave Detector
M. Bianchi, E. Coccia, C. N. Colacino +2
We consider the possibility of discriminating different theories of gravity using a recently proposed gravitational wave detector of spherical shape. We argue that the spin content…
Explicit Construction of Yang-Mills Instantons on ALE Spaces
Massimo Bianchi, Francesco Fucito, Maurizio Martellini +1
We describe the explicit construction of Yang-Mills instantons on ALE spaces, following the work of Kronheimer and Nakajima. For multicenter ALE metrics, we determine the abelian i…