5/31/2023 0 Comments Lepton decayInteract through the strong interaction and electromagnetic interaction when charged.Īpart from the proton, which is stable, hadrons tend to decay through the weak interaction.Hadrons can interact through all four fundamental interactions.Leptons interact through the weak interaction, the gravitational interaction and through the electromagnetic interaction when charged.Leptons are particles and antiparticles that do not interact with the strong interaction.Hadrons are particles and antiparticles that can interact through the strong interaction (eg: protons, neutrons and mesons).Charged pions are antiparticles of each other.Expect for the positron and anti muon which have their own symbols.The symbol for an antiproton and an antineutron, or an antineutrino is the particle symbol with a bar over the top of it.The same conclusion was reach for charged kaons.īelow is a table for particles and their properties:.Charged pions were often produced in pairs-leading to the conclusion that π+ meson and π- meson are a particle-antiparticle pair.They are created through high-energy interactions and apart from the neutrino, they decay into other particles and antiparticles.With new particle discoveries, the important question is raised, how do all these new particles and antiparticles fit with each other.Decay must always obey the conservation rules for energy, momentum and charge.An antimuon decays into a positron and a neutrino.A muon decays into an electron and an antineutrino.A neutral pion decays into high energy photons.A charged pion can decay into a mion and an antineutrino, or an antimuon and a neutrino.A Kaon can decay into pions, or a muon and an antineutrino or an anti muon and neutrino.The rest masses, charge and lifetimes of the new particles were measured:.Kinetic energy of the protons is converted into mass in the creation of these new particles.All new particles can be created using accelerators in which protons collide with other protons at high speed.This property led to them being called strange particles. Therefore the kaons must decay via the weak interaction.Decay of kaons took longer than expected and included pions as the product.Like pions, kaons are produced in twos through the strong interaction.Further cloud chamber photographs revealed that existence of short lived particle which are known as kaons.Has a rest mass greater than a pion but less than a proton.Or K meson which can also be positive, negative or neutral.The pi meson, a particle which is positively charged, negatively charged or neutral and has a rest mass greater than a muon, but less than a proton.Heavy electron,a negatively charged particle with rest mass two hundred times the mass of the electron.By using cloud chambers and detectors, new types of short-lived particles and antiparticles were discovered:.They collide with gas atoms creating showers of particles and antiparticles.Most cosmic rays are fast moving protons or small nuclei.Cosmic rays create short-lived particles and antiparticles.Cosmic rays are high energy particles that travel through space from the stars, including the sun.
0 Comments
Leave a Reply. |