I was away for few days but will shortly answer how God is proven outside physics:
- thousands of known records/testimonies of people healed by God (even the incurable diseases by current medicine technology)
- hundreds records/testimonies of people who visited Hell or Heaven (or both)
- thousands people delivered from various psychical diseases or serious addictions by God
- over 2000+ fulfilled prophecies up-to several hundreds years in advance
- personal testimonies preserved in Bible and some other records
- facts in Bible considered false for many centuries and verified by modern science and archeology since 20. century
- everyday experience of God in lives of many millions of Christians all around the word
RE: Well Known Scientist Michio Kaku Says He Found Definitive Proof that God Exists