I've never had this problem and my hens hatch out chicks all the time. I think what I would do if this was happening with my hens is separate the attack hen and let mama and chicks mingle with the others. She won't like it and will eventually lose some status, which in theory will calm her temperament. I'd keep her penned for a few days then let her out and see how it goes.
I agree. Separate the trouble maker and see if everyone else is ok. Otherwise you are going to have no choice and have to keep mom and chicks separate.