I believe there are ways of handling a situation like that. First like some said, for a woman to really have the courage to even raise her hand at you that means dominance and she doesnt respect you as much as she should. Women know they have the power of the pussy so they'll try to use that in any altercation or argument with her man. If a woman respectfully fears you, have the outmost respect for you, and know you not the type of man to tolerate anybody putting their hands on you and not even her then the boundaries are set respectfully for her not to cross it in a physical manner.
That being said, if a woman do infact slap you because she doesnt have the outmost respect for you, doesnt fear you as a man whatsoever, and think she can do whatever she wants to you because of power of the pussy, if she slaps you then i'd say the best thing tou can do is to overpower her back! In other words, you aggressively grab both her arms to overpower her and then put her on the floor to calm her down. To show her bitch lets not forget who's physically stronger and who can really hurt who.
It's a very psychological situation, but at the same time its caused to be physical by the woman's actions. Remember women want men who can handle them physically, mentally and emotionally!