The Double Copy of Massive Scalar-QCD

TL;DR

This paper constructs a gravitational theory from the double-copy of massive scalar QCD, revealing a new two-form-dilaton-gravity model with specific scalar interactions and explicit Lagrangian formulations.

Contribution

It introduces a novel double-copy construction for massive scalar QCD leading to a new gravity theory with detailed Lagrangian structure and all-order scalar interactions.

Findings

Derived the explicit Lagrangian up to sixth order in scalars.

Proposed an all-order form of the scalar interactions.

Established the coupling of the gravity theory to flavored massive scalars.

Abstract

We construct the gravitational theory emerging from the double-copy of massive scalar quantum chromodynamics in general dimensions. The resulting two-form-dilaton-gravity theory couples to flavored massive scalars gravitationally and via the dilaton. It displays scalar self-interaction terms of arbitrary even order in the fields but quadratic in derivatives. We work out the emerging Lagrangian explicitly up to the sixth order in scalar fields and propose an all order form.