from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A quantum number related to the number of charge states of a baryon or meson.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A quantum number or symmetry related to the strong interaction.


iso(topic) + spin.
(American Heritage® Dictionary of the English Language, Fourth Edition)
iso- +‎ spin (Wiktionary)


  • Technically, these are referred to as isospin-1 / 2 bosons, but theoretically there is little difference between spin and isospin, "explains RIKEN's Akira Furusaki who, along with Konstantin Matveev from Argonne, built the theory to describe how such particles interact1.

    Nano Tech Wire

  • We can quantify them without significantly affecting the fermions and isospin quantum numbers.

    365 tomorrows » 2009 » April : A New Free Flash Fiction SciFi Story Every Day

  • Are the x, y, and z axes only an isospin basis, or do they have actual directions in a physical frame?

    The Black Hole War

  • The other rules may be briefly mentioned here: the weak isospin rule, the strong (color) charge rule, the mass rule, the equivalence rule, the antiparticle rule, the helicity rule and the

    Scientific Blogging

  • Furthermore, by the Spin Rule, the spin of the Higgs boson is 0; by the Electric Charge Rule, its electric charge is 0, by the Weak Isospin Rule, its weak isospin is 0; and by the Strong Charge Rule, its strong charge is neutral with Nc = 1.

    Scientific Blogging

  • U (1) generator "Y" (hypercharge) and the third, z-rotation generator of the "isospin" SU (2):

    The Reference Frame


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