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  2. Baryon number - Wikipedia

    en.wikipedia.org/wiki/Baryon_number

    Three antiquarks of different anticolors, giving an antibaryon with baryon number1. The baryon number was defined long before the quark model was established, so rather than changing the definitions, particle physicists simply gave quarks one third the baryon number. Nowadays it might be more accurate to speak of the conservation of quark ...

  3. List of mesons - Wikipedia

    en.wikipedia.org/wiki/List_of_mesons

    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.

  4. List of baryons - Wikipedia

    en.wikipedia.org/wiki/List_of_baryons

    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.

  5. Meson - Wikipedia

    en.wikipedia.org/wiki/Meson

    Because quarks have a spin ⁠ 1 / 2 ⁠, the difference in quark number between mesons and baryons results in conventional two-quark mesons being bosons, whereas baryons are fermions. Each type of meson has a corresponding antiparticle (antimeson) in which quarks are replaced by their corresponding antiquarks and vice versa.

  6. Quark model - Wikipedia

    en.wikipedia.org/wiki/Quark_model

    Mesons are made of a valence quark–antiquark pair (thus have a baryon number of 0), while baryons are made of three quarks (thus have a baryon number of 1). This article discusses the quark model for the up, down, and strange flavors of quark (which form an approximate flavor SU(3) symmetry). There are generalizations to larger number of flavors.

  7. Exotic hadron - Wikipedia

    en.wikipedia.org/wiki/Exotic_hadron

    Exotic hadrons are subatomic particles composed of quarks and gluons, but which – unlike "well-known" hadrons such as protons, neutrons and mesons – consist of more than three valence quarks. By contrast, "ordinary" hadrons contain just two or three quarks. Hadrons with explicit valence gluon content would also be considered exotic. [1]

  8. Hadron spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Hadron_spectroscopy

    QCD predicts that quarks and antiquarks bind into particles called mesons. Another type of hadron is called a baryon, that is made of three quarks. There is good experimental evidence for both mesons and baryons. Potentially QCD also has bound states of just gluons called glueballs.

  9. Exotic meson - Wikipedia

    en.wikipedia.org/wiki/Exotic_meson

    The ground state hybrid mesons 0 −+, 1 −+, 1 −−, and 2 −+ all lie a little below 2 GeV/c 2. The hybrid with exotic quantum numbers 1 −+ is at 1.9 ± 0.2 GeV/c 2. The best lattice computations to date are made in the quenched approximation, which neglects virtual quarks loops. As a result, these computations miss mixing with meson ...