Meditation has been shown to change the brain and affect many mental, physical and emotional health benefits. The following are extensive lists of peer-reviewed, scientific journal articles on the effect of regular meditation, mindfulness and other contemplative practice.
Wellspring Institute for Neuroscience and Contemplative Wisdom
The Wellspring Institute for Neuroscience and Contemplative Wisdom has a comprehensive list of scientific papers found here: http://www.wisebrain.org/science/key-scientific-papers
Dr Daniel J. Siegel, M.D
Dr Dan Siegel has an extensive reference list associated with his book Aware: https://m.drdansiegel.com/pdf/Aware_DanielJSiegel_References.pdf
Live and Dare
Here is another list of 76 Benefits of Meditation and Mindfulness, based on scientific research, compiled by Live and Dare: https://liveanddare.com/benefits-of-meditation/?r_done=1
Kristin Neff
Kristin Neff has compiled a list of significant Self-Compassion publications on her website: https://self-compassion.org/the-research/