Bhabha scattering is a type of high-energy scattering process in particle physics where an electron and a positron undergo elastic scattering. It is named after the Indian physicist Homi J. Bhabha who first proposed the theoretical framework for this process.
The two leading order diagrams in Bhabha scattering are the s-channel and t-channel diagrams. These diagrams represent the two possible ways in which the electrons and positrons can exchange energy and momentum during the scattering process.
Only two leading order diagrams are considered in Bhabha scattering because they are the most dominant diagrams at high energies. Higher-order diagrams involve more complex interactions and have a smaller contribution to the overall scattering process.
The two leading order diagrams in Bhabha scattering are significant because they provide a simple and accurate description of the scattering process. They also allow for the calculation of cross-sections, which are important in determining the likelihood of a particular scattering event occurring.
Yes, there are higher-order diagrams that contribute to Bhabha scattering, but their contribution is relatively small compared to the two leading order diagrams. These diagrams involve more complex interactions and are usually only considered in more detailed calculations.
