You can find several studies online. While not conducted or paid for by Field Turf (The actual company) they post them on their site. You can also find the studies in medical journals and where the various universities publish their research.

Also let it be noted that vast majority of players that I've coached prefer field turf over grass. It's not even close.

Here's the page at the Field Turf site. https://fieldturf.com/en/why-fieldturf/proven-safety/

Also I've asked my knee docs what they think and they think field turf is better. These guys do a large majority of the pro and amateur athletes in the area.