Composite Dark Matter and a horizontal symmetry

TL;DR

This paper proposes a composite dark matter model with hyperbaryons from a confining hypercolor sector, linking it to horizontal gauge bosons that may explain anomalies in rare B-meson decays, with the mass scales aligning.

Contribution

It introduces a novel composite dark matter framework where hyperbaryons are stable candidates and connects the mediating gauge bosons to a horizontal symmetry explaining B-decay anomalies.

Findings

Hypercolor sector generates stable hyperbaryons as DM candidates.

Horizontal gauge bosons can explain B-meson decay discrepancies.

Mass scales of DM mediators and B-decay anomalies are compatible.

Abstract

We present a model of composite Dark Matter (DM), in which a new QCD-like confining "hypercolor" sector generates naturally stable hyperbaryons as DM candidates and at the same time provides mass to new weakly coupled gauge bosons $H$ that serve as DM mediators, coupling the hyperbaryons to the Standard Model (SM) fermions. By an appropriate choice of the $H$ gauge symmetry as a horizontal $SU(2)_h$ SM flavor symmetry, we show how the $H$ gauge bosons can be identified with the horizontal gauge bosons recently put forward as an explanation for discrepancies in rare $B$-meson decays. We find that the mass scale of the $H$ gauge bosons suggested by the DM phenomenology intriguingly agrees with the one needed to explain the rare $B$-decay discrepancies.