Orientifolds, hypercharge embeddings and the Standard Model

2006/05/24 by Pascal Anastasopoulos, P. Anastasopoulos, T. P. T. Dijkstra +5 · 179 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Computer science #Context (archaeology) #Cosmology and Gravitation Theories #Embedding #Gauge group #Gauge theory #Geology #Higgs boson #Hypercharge #Orientifold #Paleontology #Particle physics #Physics #Pulsars and Gravitational Waves Research #String theory #Theoretical physics #hep-th

paper · pdf · doi:10.1016/j.nuclphysb.2006.10.013

published in Nuclear Physics B 759(1-2), 83-146 (Elsevier BV) · 85 pages, 6 eps figures, LaTeX, youngtab package

arxiv created 2006/05/24 · openalex publication_date 2006/10/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The embedding of the SM hypercharge into an orientifold gauge group is studied. Possible embeddings are classified, and a systematic construction of bottom-up configurations and top-down orientifold vacua is achieved, solving the tadpole conditions in the context of Gepner orientifolds. Some hypercharge embeddings are strongly preferred compared to others. Configurations with chiral antisymmetric tensors are suppressed. We find among others, genuine examples of supersymmetric SU(5), flipped SU(5), Pati-Salam and trinification vacua with no chiral exotics.

Citations

• Chiral supersymmetric models on an orientifold of with intersecting D6-branes
• Anomalous U(1)'s in type I string vacua
• Branes vs. GUTS: challenges for string inspired phenomenology
• Supersymmetric standard model spectra from RCFT orientifolds
• D-brane probes, RR tadpole cancellation and K-theory charge
• A Pati–Salam model from branes
• One in a billion: MSSM-like D-brane statistics
• The Anthropic Landscape of String Theory
• Group theory of the spontaneously broken gauge symmetries
• The Landscape "avant la lettre"

Cited by

• String constraints on discrete symmetries in MSSM type II quivers
• Instanton induced neutrino Majorana masses in CFT orientifolds with MSSM-like spectra
• Phenomenological analysis of D-brane Pati-Salam vacua
• Small Neutrino Mass from Large Compactification Volumes
• Four-dimensional string compactifications with D-branes, orientifolds and fluxes