Fusion as the Break

Two protons approach each other. They are identical — same charge, same mass, same spin. They are 1:1. The mirror. Electromagnetic repulsion holds them apart; the symmetry resists breaking. The mirror holds. Gravity disagrees.

At the core of a star, gravity compresses matter until the temperature reaches fifteen million degrees. At that temperature protons carry enough kinetic energy to approach within femtometres of each other — close enough to quantum-tunnel through the Coulomb barrier. Once through, the strong force grabs hold; two protons fuse into a diproton, which is unstable. One proton converts to a neutron — a beta-plus decay, releasing a positron and a neutrino. The product is deuterium: one proton, one neutron. Two identical particles have become two different particles. The symmetry is broken.

The product has less mass than the two inputs. The mass deficit is released as energy — as photons, as neutrinos, as kinetic energy of the products. That mass deficit is ε expressed as energy. That energy release is the break expressed as radiation. 1:1 + 1×ε is not a historical event that happened once 13.8 billion years ago and then stopped. It is happening right now. In the core of the sun, it consumes 3.7 × 10³⁸ protons per second. The Big Bang is not past tense. It is present tense. The Big Bang was the first break; fusion is the ongoing break. Same axiom. Same structure. One ignited the arena; the other sustains it.