QED stands for Quantum Electrodynamics, which is the theory that describes the interaction between electrons and photons. In the context of electron proton scattering differential cross section, QED is used to calculate the probability of an electron interacting with a proton and scattering at a particular angle.
The electron proton scattering differential cross section is typically measured by colliding a beam of electrons with a target of protons and measuring the number and angle of scattered electrons. This data is then used to calculate the differential cross section, which is a measure of the probability of the scattering event.
The electron proton scattering differential cross section is influenced by several factors, including the energy of the incoming electron, the angle of scattering, and the size and composition of the target proton. Other factors such as the presence of other particles and the strength of the electromagnetic force can also impact the differential cross section.
The electron proton scattering differential cross section is an important quantity in particle physics as it provides information about the internal structure of protons and their interactions with other particles. It is also used to test the predictions of QED and other theoretical models.
As the energy of the incoming electron increases, the electron proton scattering differential cross section also increases. This is because at higher energies, the electrons have a higher probability of interacting with the protons, resulting in a larger number of scattered electrons. However, at very high energies, the cross section may decrease due to the effects of quantum corrections and other factors.