BRST symmetry and the convolutional double copy

A bstract Motivated by the results of Anastasiou et al., we consider convolutional double copy for BRST and anti-BRST covariant formulations gravitational gauge theories in more detail. We give a general invariant formulation linearised $$ \mathcal{N} N = 0 supergravity using superspace methods show how this may be obtained from square Yang-Mills theories. demonstrate relation Schwarzschild black hole ten-dimensional string solution as two concrete examples.