i know what you wanted to do, but it was not done correctly. Hint the faint line on the right side beside the center. Thats fault brushing, you should have cleaned that part.
Now for the particles thingy, i think you should have reduced the "fog" that is on the psd, and made that effect arround it more than being on top of the psd.
Then from there, reduce the effect as it goes away from the psd. But you should reduce it from the psd to give it a focus coz it doesnt look good imo. i hope you understood what i was saying?