Perhaps you should try some spelling variations:
"particles accelerated" » "particles acceleration", "partially accelerated", "lattices accelerated"
"naturally accelerate" » "naturally regenerated", "partially accelerated"
"particle accelerators" » "particle accelerating"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("particle accelerator") OR ((((("particle accelerators") OR ("particle acceleration"))) OR ((("particles accelerated") OR ("naturally accelerate")))))).
• Removing quotes may allow a broader search: (( particle accelerator ) or ((((( particle accelerators ) or ( particle acceleration ))) or ((( particles accelerated ) or ( naturally accelerate )))))).
• Adding a wildcard symbol may retrieve word variants: (("particle accelerator") or ((((("particle accelerators") or ("particle acceleration"))) or ((("particles accelerated") or ("naturally accelerate"))))))*.