So a computer model possibly discovers a new physical process that wasn’t expected. I think we can assume that the model was based on standard quantum electrodynamics, not some alternate theory popular on a small number of internet chat forums and blogs.
So you want to "Assume" something not in evidence. OK. They specifically state: "Here we report computer simulations that show that neither of the two previously favoured mechanisms controls how magnetic field lines reconnect in the plasmas of greatest interest, those in which the magnetic field dominates the energy budget." Those are the models that are based on the standard quantum electrodynamics. Sorry. Again, in a laboratory, it can be demonstrated how this DOES work. Astrophysicists insist on using mathematical models rather than real world experiments. The MAP is not the territory. Math should not be assumed to reflect reality. Models are not reality. If they were, we'd be burning up in a Global Warming Climate.