Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-08-13
Phys.Rev.D59:107901,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTeX, 8pg
Scientific paper
10.1103/PhysRevD.59.107901
We determine the units and numerical values for a class of couplings in the effective theory of perturbative heterotic string vacua, with the emphasis on the correct translation between the canonical gauge coupling g and Planck scale M_Planck ~ 1.2 x 10^19 GeV as used in the effective theory description and the string coupling g_string and string tension alpha' as used in the S-matrix amplitude calculation. In particular, we determine the effective couplings in the superpotential and revisit the Fayet-Iliopoulos (FI) term in a class of models with an anomalous U(1). We derive the values of the effective Yukawa couplings (at the third and fourth order) after the restabilization of vacuum along a particular F- and D-flat direction and show that they are comparable in magnitude. The result corrects results quoted in the literature, and may have implications for the string derived phenomenology, e.g., that of fermion textures.
Cvetic Mirjam
Everett Lisa
Wang Jing
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