Do you think a lightsaber can cut through superman?

I am not sure about this, because if you think about it a light saber is made of plasma and in "Pre-Crisis Superman" Superman has flown through the heart of a star without being harmed. Therefore, he is immune to plasma, and we all know plasma is basically the form of matter which stars are made of. Now if we want to get technical the "Force Of Impact" could harm superman but only red lightsabers contain this effect cause if we have learned anything from the Superman and the star wars comic is that superman receives most of his energy from the radiation of our yellow sun and is weakened when exposed to radiation from a red sun. It is possible that a sith lightsaber, aka red lightsaber , to weaken him. This is proven in issue #256 Fall of SuperBoy when Superboy Prime was defeated after being plunged through Krypton's red sun - which indeed weaken him So Now if the red saber could harm superman it only take down his "super human force field" which makes him immune to bullets, lava anything really. That would make superman vulnerable to anything physical, but see light sabers are just formed from plasma and have no density in them so if we would use the the mathematical formula to find out what it would be like to hit superman with a light that being "P= M/V" We would find that hitting superman with a lightsaber would be like hitting a human with a wet noodle :P

On another note there are other facts that prove that light sabers can cut through superman but I dont feel like getting into it now.

So what do you think?