The best research I ever found was a metastudy in Clinical Psychology Review: "Does mindfulness training improve cognitive abilities? A systematic review of neuropsychological findings" concludes that there's enough evidence that further investigation is warranted.
There's also a lot of downstream research (citing articles) from both publications that are worth investigating.
Transferability though, is still an open question. Even in this meta study, the author's admit that certain types of mindfulness training may be beneficial to certain outcomes.
So perhaps you'll be more mindful and less distracted, but you won't be any "smarter."