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These lists detail all known and predicted baryons in total angular momentum J = 1 / 2 and J = 3 / 2 configurations with positive parity. [5]Baryons composed of one type of quark (uuu, ddd, ...) can exist in J = 3 / 2 configuration, but J = 1 / 2 is forbidden by the Pauli exclusion principle.
Quark bound states beyond the pentaquark, like hexaquarks and heptaquarks. Leptoquark , hypothetical particles that are neither bosons or fermions but carry lepton and baryon numbers . Magnetic monopole is a generic name for particles with non-zero magnetic charge.
Download as PDF; Printable version; ... Ordinary nucleons (symbol N, meaning either a proton or neutron), ... name Symbol Quark content
The quark–gluon plasma would be characterized by a great increase in the number of heavier quark pairs in relation to the number of up and down quark pairs. It is believed that in the period prior to 10 −6 seconds after the Big Bang (the quark epoch ), the universe was filled with quark–gluon plasma, as the temperature was too high for ...
Mesons named with the letter "f" are scalar mesons (as opposed to a pseudo-scalar meson), and mesons named with the letter "a" are axial-vector mesons (as opposed to an ordinary vector meson) a.k.a. an isoscalar vector meson, while the letters "b" and "h" refer to axial-vector mesons with positive parity, negative C-parity, and quantum numbers I G of 1 + and 0 − respectively.
Protons, composed of two up and one down quark (uud) Neutrons, composed of two down and one up quark (ddu) Hyperons, such as the Λ, Σ, Ξ, and Ω particles, which contain one or more strange quarks, are short-lived and heavier than nucleons. Although not normally present in atomic nuclei, they can appear in short-lived hypernuclei.
The symbols u, d, s, c, b, and t stand for the up, down, strange, charm, bottom, and top quarks respectively, with the symbols of u, d, s, c, b, t corresponding to the respective antiquarks. For instance a pentaquark made of two up quarks, one down quark, one charm quark, and one charm antiquark would be denoted uudc c.
Hence Ξ c, Ξ b, Ξ cc, Ξ cb, etc. Unless specified, the non-up/down quark content of Xi baryons is strange (i.e. there is one up or down quark and two strange quarks). However a Ξ 0 b contains one up, one strange, and one bottom quark, while a Ξ 0 bb contains one up and two bottom quarks. In 2012, the CMS experiment at the Large Hadron ...