isospin multiplet

isospin multiplet

[′ī·sə‚spin ′məl·tə·plət]
(particle physics)
A collection of elementary particles which have approximately the same mass and the same quantum numbers except for charge, but have a sequence of charge values, (Y /2) -I, (Y /2) -I + 1, …, (Y /2) + I times the proton charge, where Y is an integer known as the hypercharge, and I is an integer or half-integer known as the isospin; examples are the pions (Y = 0, I = 1) and the nucleons (Y = 1, I = 1/2). Also known as charge multiplet; particle multiplet.
References in periodicals archive ?
Thus, like spin multiplets of a quantum state, one combines corresponding states of nuclear isobars in an isospin multiplet.
The issue to be examined is the structure of the isospin multiplet of the four baryons:
This evidence shows the goodness of the isospin notion, where strong interactions dominate the state of members of an isospin multiplet and the effect of all other interactions can be regarded as a small perturbation.