an:06088558
Zbl 1247.81348
Bouchard, Vincent; Donagi, Ron
An \(SU(5)\) heterotic standard model
EN
Phys. Lett., B 633, No. 6, 783-791 (2006).
00307718
2006
j
81T30 14J32 14J81 81V22 81T60
Minimal Supersymmetric Standard Model (MSSM); heterotic stringsheterotic strings; Calabi-Yau threefold
Summary: We introduce a new heterotic Standard Model which has precisely the spectrum of the Minimal Supersymmetric Standard Model (MSSM), with no exotic matter. The observable sector has gauge group \(SU(3)_C\times SU(2)_L\times U(1)_Y\). Our model is obtained from a compactification of heterotic strings on a Calabi-Yau threefold with \(Z_{2}\) fundamental group, coupled with an invariant \(SU(5)\) bundle. Depending on the region of moduli space in which the model lies, we obtain a spectrum consisting of the three generations of the Standard Model, augmented by 0, 1 or 2 Higgs doublet conjugate pairs. In particular, we get the first compactification involving a heterotic string vacuum (i.e., a stable bundle) yielding precisely the MSSM with a single pair of Higgs.