Heterotic Line Bundle Models on Generalized Complete Intersection Calabi Yau Manifolds

TL;DR

This paper extends heterotic line bundle model building to generalized Complete Intersection Calabi Yau manifolds, identifying suitable geometries with freely acting symmetries for GUT models and systematically scanning for standard-like models.

Contribution

It introduces new gCICY geometries for heterotic models, demonstrates their symmetry properties, and performs a systematic scan resulting in numerous standard-like models.

Findings

Identified two gCICY geometries suitable for heterotic GUT models.

Found that these geometries admit freely acting $ ext{Z}_2$ symmetries for Wilson line breaking.

Generated 132 standard-like models through systematic line bundle scans.

Abstract

The systematic program of heterotic line bundle model building has resulted in a wealth of standard-like models (SLM) for particle physics. In this paper, we continue this work in the setting of generalised Complete Intersection Calabi Yau (gCICY) manifolds. Using the gCICYs constructed in Ref. [1], we identify two geometries that, when combined with line bundle sums, are directly suitable for heterotic GUT models. We then show that these gCICYs admit freely acting $\mathbb{Z}_2$ symmetry groups, and are thus amenable to Wilson line breaking of the GUT gauge group to that of the standard model. We proceed to a systematic scan over line bundle sums over these geometries, that result in 99 and 33 SLMs, respectively. For the first class of models, our results may be compared to line bundle models on homotopically equivalent Complete Intersection Calabi Yau manifolds. This shows that the number of realistic configurations is of the same order of magnitude.