Non-supersymmetric heterotic model building

Abstract

We investigate orbifold and smooth Calabi-Yau compactifications of the non-supersymmetric heterotic SO(16)xSO(16) string. We focus on such Calabi-Yau backgrounds in order to recycle commonly employed techniques, like index theorems and cohomology theory, to determine both the fermionic and bosonic 4D spectra. We argue that the N=0 theory never leads to tachyons on smooth Calabi-Yaus in the large volume approximation. As twisted tachyons may arise on certain singular orbifolds, we conjecture that such tachyonic states are lifted in the full blow-up. We perform model searches on selected orbifold geometries. In particular, we construct an explicit example of a Standard Model-like theory with three generations and a single Higgs field.

1+30 pages latex, 11 tables; v2: references and minor revisions added, matches version published in JHEP

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Cited by in corpus (12)

• Towards a Non-Supersymmetric String Phenomenology
• Chiral Heterotic Strings with Positive Cosmological Constant
• Universality of Gauge Thresholds in Non-Supersymmetric Heterotic Vacua
• Stability, enhanced gauge symmetry and suppressed cosmological constant in 9D heterotic interpolating models
• Delta(54) flavor phenomenology and strings
• Rigour and Rigidity: Systematics on particle physics D6-brane models on Z(2)xZ(6)
• Lie algebra lattices and strings on T-folds
• Gravitational Threshold Corrections in Non-Supersymmetric Heterotic Strings
• Dark Horse, Dark Matter: Revisiting the SO(16)x SO(16)' Nonsupersymmetric Model in the LHC and Dark Energy Era
• U(1)' coupling constant at low energies from heterotic orbifolds
• Non-SUSY Gepner Models with Vanishing Cosmological Constant
• $USp(32)$ Special Grand Unification