Strange and non strange current

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SUMMARY

The discussion centers on the definitions of "strange" and "non-strange" currents in the context of quantum chromodynamics (QCD), specifically relating to quark color currents. The formula provided, j^a_f = ∑_{ik} \bar{ψ}^i_f γ^μ (T^a)_{ik} ψ^k_f, illustrates how to calculate the color current for each flavor of quark, where the SU(3) color indices are denoted by ik and a. To obtain the total color current, one must sum over all flavors from f=1 to 6. This highlights the importance of understanding flavor and color symmetries in particle physics.

PREREQUISITES
  • Understanding of quantum chromodynamics (QCD)
  • Familiarity with quark flavor and color symmetries
  • Knowledge of SU(3) group theory
  • Proficiency in using Dirac notation and gamma matrices
NEXT STEPS
  • Study the derivation of quark color currents in quantum chromodynamics
  • Learn about the implications of SU(3) symmetry in particle physics
  • Explore the role of flavor in the Standard Model of particle physics
  • Investigate the applications of gamma matrices in quantum field theory
USEFUL FOR

Particle physicists, theoretical physicists, and students studying quantum chromodynamics and the Standard Model will benefit from this discussion.

sajad099
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Can anyone explain the meaning of strange and non strange current.i'm confused about the definition
 
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I guess you are referring to the quark coor currents

j^a_f = \sum_{ik}\bar{\psi}^i_f \gamma^\mu (T^a)_{ik}\psi^k_f

You get such a color current (where ik and a are the SU(3) color indices) for each flavour f. For the total color current you have to sum over all flavors f=1..6. Is it this what you mean?
 

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