Light traveling transverse to a massive body (e.g. Sun) is deviated by an angle twice the amount predicted by Newtonian gravitational theory. This is predicted by GR and proven experimentally. What would be the deviation of a matter particle traveling near c transverse to a massive body? Would it also be deviated by an angle nearly twice the amount predicted by Newtonian theory? Or would it much more because its relativistic mass/energy would make its gravitational mass very large? Or would it be deviated by the Newtonian amount?