• Claude Amsler
Part of the Lecture Notes in Physics book series (LNP, volume 949)


Let us now extend the isospin symmetry group to the three light quarks u, d and s. Apart from I3, strangeness S is also a conserved quantum number in strong interactions. It is often more convenient to use the hypercharge Y as a conserved quantity, with quantum number y related to S through ( 1.4):


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© The Author(s) 2018

Authors and Affiliations

  • Claude Amsler
    • 1
    • 2
  1. 1.Stefan Meyer InstituteAustrian Academy of SciencesViennaAustria
  2. 2.Physics InstituteUniversity of ZurichZurichSwitzerland

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