Types of hadron, the Baryon which is a system of three quarks (e.g. The quarks are peculiar as they posses aĬharge which is a fraction of that for the electron. It is theseįundamental particles which form neutrons, protons etc, which areĬollectively known as hadrons, (it is mainly the up and down whichįorm the world around us). Quarks), which are grouped into 3 pairs (or generations) up &ĭown, charmed & strange and top and bottom. We now know there are are six quarks (or called flavours of 1 Antiparticles are represented by the symbol of the particle with an overbar.What is the difference between quarks and leptons and what are each bosons responsible for? As far as we know, baryon number and lepton number are absolutely conserved, which means that baryons and leptons can only be created or destroyed in particle-antiparticle pairs. Their antiparticles have lepton number -1 and baryon number -1. Thus, a lepton has lepton number 1 and a baryon has baryon number 1. The lepton number is the number of leptons minus the number of antileptons, with a similar definition for baryon number. These have the same mass and spin but opposite values of the electric charge and various other quantum numbers such as lepton number or baryon number. Antiparticles exist for all particles.We will discover additional intermediary particles in our discussion of the standard model. The graviton is postulated to have zero mass and spin 2. Gravitons are thought to transmit the gravitational force, though they have not been directly observed.Photons transmit the electromagnetic force and have zero mass and spin 1.Intermediary particles are those that transfer energy, momentum, charge, and other properties from one particle to another in association with one of the four fundamental forces.An example of strange particle production is when a negative pion collides with proton, giving rise to a neutral lambda particle and a neutral kaon. For instance, if one particle has strangeness +1 then the other must have strangeness -1. Strange particles are always created in pairs by strong processes in such a way that the total strangeness remains zero. This explains their anomalously long half-lives. However, strangeness is not conserved by weak processes, allowing strange particles to decay via the weak interaction, which indeed is much weaker than the strong interaction at low energies. This is interpreted to mean that such particles possess a property called strangeness that is conserved by strong processes, thus making strange particles stable against strong decay into non-strange particles. Strange particles are baryons and mesons that are unstable, but have much longer half-lives than other particles of similar mass and spin.Mesons are hadrons with integral spin, mainly 0 and 1.The proton and neutron are well known examples. Baryons are hadrons with half-integral spin, mainly 1/2 and 3/2. ![]() They are divided into two sub-categories depending on their spin:
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