Truma for a baby?

So recently my partner got physicallyabusive towards me (which hes not done before). He screamed at me and hit me in front of our 8 month old baby. Everytime he hit me our baby would scream in a way ive never heard before. Im so worried that this caused some permanent damage to him. As genetic issues run in the family that can be triggered as children by truma. EDIT: I'm not looking for relationship advice and i never said i was staying with him after that. My question is will it cause damage to my 8 month old after that.