Chiral Generations on Intersecting 5-branes in Heterotic String Theory

TL;DR

This paper demonstrates the existence of chiral matter localized on intersecting 5-branes in heterotic string theory, constructing a brane-world scenario and providing a new proof of anomaly cancellation.

Contribution

It introduces a novel intersecting 5-brane configuration in heterotic string theory that yields chiral matter and a new proof of anomaly cancellation without small instantons.

Findings

Existence of chiral matter on intersecting 5-branes.

Construction of a heterotic brane-world setup.

New proof of anomaly cancellation.

Abstract

We show that there exist two 27 and one 27 bar of E6, net one D=4, N=1 chiral matter supermultiplet as zero modes localized on the intersection of two 5-branes in the E8 x E8 heterotic string theory. The smeared intersecting 5-brane solution is used via the standard embedding to construct a heterotic background, which provides, after a compactification of some of the transverse dimensions, a five-dimensional Randall-Sundrum II like brane-world set-up in heterotic string theory. As a by-product, we present a new proof of anomaly cancellation between those from the chiral matter and the anomaly inflow onto the brane without small instanton.