Titlebook: Masses of Fundamental Particles; Cargèse 1996 Maurice Lévy,Jean Iliopoulos,Jean-Marc Gérard Book 1997 Springer Science+Business Media New Y

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BPS States in Superstrings with Spontaneously Broken Susy,endent gravitino masses. The BPS spectrum of the theory with lower supersymmetry is in one-to-one correspondence with the spectrum of the heterotic . = 4 string. The mass splitting of the . = 4 spectrum depends on the moduli as well as the three .-symmetry charges. In the case of . = 4 → . = 2, the

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Gaugino Condensation, Loop Corrections, and S-Duality Constraint,s is because the spectrum of the theory easily accomodates the Standard Model spectrum and gauge structure. In addition, the underlying gauge group contains an extra factor of .. which provides an ‘hidden sector’, which couples to the observable sector only through gravity, and, as will be discussed

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