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If the meson is not pseudoscalar (J P = 0 −) or vector (J P = 1 −), J is added as a subscript. When the spectroscopic state of the meson is known, it is added in parentheses. When the spectroscopic state is unknown, mass (in MeV/c 2) is added in parentheses. When the meson is in its ground state, nothing is added in parentheses.
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.
In particle physics, a kaon, also called a K meson and denoted K, [a] is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark).
In high-energy physics, a pseudoscalar meson is a meson with total spin 0 and odd parity (usually notated as J P = 0 −). [1] [a] Pseudoscalar mesons are commonly seen in proton-proton scattering and proton-antiproton annihilation, and include the pion (π), kaon (K), eta (η), and eta prime (η ′) particles, whose masses are known with ...
In particle physics, a pion (/ ˈ p aɪ. ɒ n /, PIE-on) or pi meson, denoted with the Greek letter pi (π), is any of three subatomic particles: π 0, π +, and π −. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the ...
A mesonic molecule is a set of two or more mesons bound together by the strong force. [1] [2] Unlike baryonic molecules, which form the nuclei of all elements in nature save hydrogen-1, a mesonic molecule has yet to be definitively observed. [3]
Scientists potentially uncovered a glueball particle, an enigmatic entity believed to be made entirely of the strong nuclear force's gluons.
In particle physics, the quark model is a classification scheme for hadrons in terms of their valence quarks—the quarks and antiquarks that give rise to the quantum numbers of the hadrons. The quark model underlies "flavor SU(3)" , or the Eightfold Way , the successful classification scheme organizing the large number of lighter hadrons that ...