Numerical relativity in biscalar gravity

The search for modifications to Einstein's theory of general relativity has become increasingly intriguing as recent and upcoming gravitational wave experiments open a new window to probe gravity with compact objects such as black holes. One natural extension to general relativity arises from the four-dimensional string-inspired effective field theory of gravity which introduces two scalar fields, (non)minimally coupled to curvature as well as coupled to each other. To search for new black hole solutions, I will present simulations of two kinetically coupled fields that are minimally coupled to curvature evolving around single black holes using the open-source parameterized numerical relativity code, Canuda-AxiDil. We include the backreaction of the fields onto the black-hole spacetime in these simulations and vary the initial field values and their momenta to probe for the effect of the evolving fields on the black hole spacetime.