However, here are some options you could use, depending on the context:
Formal:
* A faculty (if they are all university professors)
* A panel of experts
* A group of scholars
* A research team
Informal:
* A brain trust
* A think tank
* A bunch of geniuses (lighthearted and humorous)
Ultimately, the best term to use will depend on the specific situation and the tone you want to convey.