Tree-Level Amplitudes

Tree-level amplitudes are calculations in particle physics that describe the basic interactions between particles, like electrons or quarks, without considering more complex effects. Imagine them as the simplest route or diagram of a process, resembling a tree with branches representing particle exchanges. These calculations provide the initial approximation of how particles scatter or decay, forming the foundation before adding more detailed factors such as loops or higher-order corrections. They are fundamental to understanding particle behavior and are essential in predicting outcomes in high-energy experiments like those at the Large Hadron Collider.