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The Xi baryons or cascade particles are a family of subatomic hadron particles which have the symbol Ξ and may have an electric charge (Q) of +2 e, +1 e, 0, or −1 e, where e is the elementary charge.
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The best known baryons are protons and neutrons, which make up most of the mass of the visible matter in the universe, whereas electrons, the other major component of atoms, are leptons. Each baryon has a corresponding antiparticle, known as an antibaryon, in which quarks are replaced by their corresponding antiquarks.
Particle NameSymbolQuark ContentRest Mass ( Mev / C2 )p , p + , N +u u d938.272 0813(58) [a]n , n 0 , N 0u d d939.565 4133(58) [a]u d s1 115.683 ± 0.006charmed lambda [11]u d c2 286.46 ± 0.14In particle physics, a baryon is a type of composite subatomic particle, including the proton and the neutron, that contains an odd number of valence quarks, conventionally three. Baryons belong to the hadron family of particles; hadrons are composed of quarks. Baryons are also classified as fermions because they have half-integer spin.
Protons and neutrons each contain three quarks; they belong to the family of particles called the baryons. Other baryons are the lambda, sigma, xi, and omega particles. On the other hand, mesons bosons and are composed of two quarks: a quark and an antiquark.
In this decay of the Xi particle, a lambda baryon and two gamma rays are shown as the products. Actually, the primary decay of the Xi is to a lambda-zero and a pi-zero meson. This cannot be a purely electromagnetic decay because strangeness is not conserved.
Baryons. Table of Baryons. As an example of the notation in the column of decay modes, the sigma + decay mode is written. pπ 0, nπ +. which implies there are two common decay modes, Σ + → p + π 0 and Σ + → n + π +.
Apr 18, 2020 · This explains the existence of the baryon octet of particles with similar and contrasting properties, determined by the symmetry of their construction. For example, the ##\Sigma^+## particle follows the same pattern as the proton, with the down quark replaced by a strange quark; and the ##\Sigma^-## particle has the same pattern as the ##\Sigma ...
