A Standard Model from the E8 × E8 Heterotic Superstring
نویسندگان
چکیده
In a previous paper, we introduced a heterotic standard model and discussed its basic properties. This vacuum has the spectrum of the MSSM with one additional pair of Higgs-Higgs conjugate fields and a small number of uncharged moduli. In this paper, the requisite vector bundles are formulated; specifically, stable, holomorphic bundles with structure group SU(N) on smooth Calabi-Yau threefolds with Z3×Z3 fundamental group. A method for computing bundle cohomology is presented and used to evaluate the cohomology groups of the standard model bundles. It is shown how to determine the Z3 ×Z3 action on these groups. Finally, using an explicit method of “doublet-triplet splitting”, the low-energy particle spectrum is computed. ∗vbraun, yanghe, [email protected]; [email protected]
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