Physical discipline and abuse are two very different things. Which are you pertaining too? If you mean Abuse, sure, if you mean to include paddling or hand slaps, no.
While this is a huge assumption to make, I would argue this question implies that a parent does nothing else except to discipline the child, that is to say, the parent does not encourage, feed, teach, sing, read, etc, their child. With regard to the parent that does all these things for the child and occasionally disciples the child physically when the do wrong... There is no proof that such a child is psychologically harmed.
I do not condone beating children. I don't even condone yelling or shouting at children (unless you need to get their attention before the do something that could cause harm to themselves or others). However, kids need to know the difference between right and wrong. The sooner they learn, the better. Unfortunately for them, they need to learn this as a toddler during their "terrible two's." I say unfortunately because they haven't developed their language to a level that understands reasoning or explanation. Their simple minds need to understand simple terms "yes" and "no." Furthermore, I believe open handed spankings (no weapons) on their bottoms is the best way to get their attention. A spanking should never leave physical bruises. Instead the spankings should leave permanent implant in their minds that there are repercussions to negative behavior or actions. If spankings are properly implemented, most kids should have received their last spanking before preschool.
It’s not our job to toughen our children to face a cruel and heartless world. It’s our job to raise children who will make the world a little less cruel and heartless. - L.N. Knost
We're teaching them it's violence is normal, acceptable if you are low in the hierarchy or weaker. We make them aggressive or self-hating. We are destroying them and heir humanity.