There is much research that is documenting the many benefits of meditation. These are just a few articles that you can refer to, just click on the publication name to link to the article:
Studies referenced by the National Institutes of Health
More focused attention – Neuroscience of Mindfulness – October 2016
Decreases stress – Biological Psychiatry – July 2016
Better sleep quality – The New York Times - February 2015
Improves healthy aging – Carnegie Mellon University February 2016
Brain Changes- Scientific American 2014