Maybe the quantum background ends up with the momentum. Honestly, don't have a better hypothesis, but if we're to accept pilot waves we end up back at luminifer

Maybe the quantum background ends up with the momentum. Honestly, don't have a better hypothesis, but if we're to accept pilot waves we end up back at luminiferous aether, so it's anyone's guess. I still reckon there's an experimental error somewhere - but if there isn't, it's undeniably a big deal.