Ruth Alexandra Britto-Pacumio is an American mathematical physicist whose research topics include black holes, Yang–Mills theory, and the theory of Feynman integrals; with Freddy Cachazo, Bo Feng, and Edward Witten she is one of the namesakes of the BCFW recursion relations for computing scattering amplitudes.[1] She is an associate professor in mathematics and theoretical physics at Trinity College Dublin,[2] and is also affiliated with the Institut de physique théorique - IPhT Saclay.