The pair were awarded the Enrico Fermi Prize for their outstanding contributions to the experimental evidence of CP violation in the heavy-quark sector.
Jacques Soffer was a prolific theorist and phenomenologist who played a big part in persuading the elementary particle community of the importance of polarisation-type measurements.
Anton Oed was a passionate inventor whose introduction of micro-strip gas chambers at the Institut Laue-Langevin in 1988 was a decisive breakthrough in the field of radiation detectors.
The $3 million prize will be shared equally between 347 researchers who were co-authors of the six papers published by the EHT collaboration on 10 April.