Interesting question, thanks for asking this! I think there are different types of research on spirituality. But I guess it depends on what you mean when you say ‘spirit’, do you mean it in the religious sense or new age sense etc. but there is research on spirituality. Arguably quantum physics addresses some issues around that and I found this paper on it… https://pmc.ncbi.nlm.nih.gov/articles/PMC3190564/#:~:text=There%20is%20a%20paucity%20of,have%20concentrated%20on%20meditative%20practices.