Re: @Brewster's Angle Grinder -- WHO ORDERED THAT!
This is more bikeshedding than garden shed boffinry. The "tradition" is that of a cottage industry of HEP guys who will build particles to fit any bump in your data. It's glorified curve fitting, and it doesn't even produce a unique curve.
The justification is to explain dark matter or give us insight into a complete theory. And there's nothing to say this X doesn't mark the spot where a Nobel prize lays buried. But these are physicist gold panners; staking a claim and digging away furiously. If they've struck gold, congratulations to them: the hard work paid off.