I applied to UO for a PhD because after browsing their HEP staff webpages I was impressed because most of them had their PhD degree from top schools. But I then got surprised by their bad ranking. They aren't even mentioned in ARWU top 200 grad schools in physics. Even 300 top schools in physics of QS list don't include UOregon. I'm afraid by that. Is it a bad school? Why is that happening?