After creating material or particle system in content browser it lets me name it and when I hit enter it disappears

I right mouse clicked to create a new particle system in the content browser then the box popped up and I typed a name of the particle system inside that box. However when I hit enter the box disappeared from view. I know it went somewhere, but I was unable to find it in the search. This is a new issue. Last week I could right click to create new materials and particle systems and I was able to name them and they didn’t go away. I’m really new to this so I’m probably doing something wrong.