I honestly don't know what research, if any, establishes the effectiveness of mesh. Aerostich claims that their textiles (not mesh) are comparable or better than leather. I dunno if that's quite the case, I like to see research based evidence.
Note that professional racers still wear leather, AFAIK.
Having said all that, it gets hot as hell here in NM and the rest of the SW. So, the wife and I have leather jackets (and I have Aerostich Roadcrafter pants) for much of the year; but in the summer we've switched to mesh. Mesh jackets and mesh pants, with removable liners. We really like our Cortech jackets so far. I just got the GX Air, mesh with leather. My flight partner at Med Flight wears a Roadcrafter suit much of the year, and a BMW mesh thing in summer.
I noticed you'll be wearing jeans with kevlar. That's probably better than just jeans; but consider mesh overpants. I believe, based only on personal observations-not scientific evidence, that the extra layer may be the difference between nasty road rash and skin grafts. Sometimes I'm amazed by how not hurt my patients are; but some get really ugly wounds.
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Once I got my wife to try the mesh overpants (she likes her Draggin Jeans), she agreed they weren't any hotter.
Glad to hear you'll be wearing helmet, gloves, and boots.
Ride safely!