O Gauge Coupling - Dapol
1995-6-19 · Furthermore, whenever some particles can be either light or heavy depending on some moduli VEVs, in order for the physical masses of those particles to be of the order Mstring, the unnormalized VEVs of the Higgs-like moduli have to be of the order O(Mm). Thus, the effective gauge couplings 'feel' the string threshold at Mstring, while the Wilsonian couplings …
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