Why does pions(coming through atmosphere) decays into a muon and a muon neutrino, not directly into electron and lelectron neutrino?I know it's because splin angular momentum conservation...but I need to be more clear about it.
An atmospheric neutrino is a type of neutrino particle that is created in the Earth's atmosphere through the decay of pions, which are produced by high-energy cosmic rays interacting with the air molecules. These neutrinos have a wide range of energies and can travel great distances before interacting with other particles.
Atmospheric neutrinos are created through the decay of pions, which are produced when high-energy cosmic rays, such as protons or nuclei, collide with air molecules in the Earth's atmosphere. These pions then quickly decay into muons and muon neutrinos, which can be detected by scientists.
Studying atmospheric neutrinos can provide important information about the composition and behavior of high-energy cosmic rays, which are difficult to study directly. It can also help us understand the properties and interactions of neutrinos, which are one of the most abundant particles in the universe but are difficult to detect due to their weak interactions with matter.
Atmospheric neutrinos are detected using large underground detectors, such as the Super-Kamiokande detector in Japan. These detectors are filled with a transparent medium, such as water or ice, and surrounded by sensitive photodetectors. When a neutrino interacts with the medium, it produces a faint flash of light that can be detected by the photodetectors.
Atmospheric neutrinos play a crucial role in particle physics research as they provide a unique source of high-energy neutrinos, which can be used to study the fundamental properties of these particles. They can also help us understand the origins and behavior of high-energy cosmic rays, which are important for understanding the structure and evolution of our universe.