Have we made it clear that adcoms are under zero obligation to read your research? Adcoms are not subject specialists, capable of interpreting this quality, nor do they have time. And you don’t get an admit on as simple a basis as some good research, even if published. They’re building more than that in their communities.
IF, and only IF, the rest of your app is everything they want (and it’s your responsibility to understyand what each target seeks in its students,) then they might send it to a cooperative faculty member for a look-see.
If your research mentor calls admissions and says you’re the greatest, that’s personal contact. It happens. But rarely. Admissions would record it in your file and continue on with their same quest for the right kids for the class.
You can mention it, sure. You can include a very brief (a few lines) abstract in Addl Info. But the quality of your full app and supp is still what matters.