Z° Isospin: Understanding T³=0 and Weak Isospin in Particle Physics

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In summary, the Z° is a mixture of the B (iso-scalar) and W° (iso-triplet with T³=0) particles. While it is still possible to say that the Z° has T3=0, this may be meaningless due to the breaking of the original SUwI(2) * UY(1) symmetry and the mixing in the Z°. However, after mixing, both the iso-scalar and T3=0 components of the iso-triplet will have T3=0, indicating that the resulting states (Z0 and photon) should also have T3=0. This is further supported by the fact that the Z is in an eigenstate of Q, Y
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tom.stoer
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Z° and weak isopsin

The Z° is a mixture of the B (iso-scalar) and the W° (iso-triplet with T³=0). Is it OK to say that the Z° still has T³=0? Or is this meaningless due to the breaking of the original SUwI(2) * UY(1) to Uem(1) and the mixing in the Z°?
 
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Since both the iso-scalar and the T3=0 component of the iso-triplet have T3=0, after mixing the resulting states (Z0 and photon) should still have T3=0 (I think).
 
  • #3
I think so, too, but is this really correct?
 
  • #4
The Z is in an eigenstate of Q, and in an eigenstate of Y, right? So it must be in an eigenstate of T3.
 
  • #5
right
 

Related to Z° Isospin: Understanding T³=0 and Weak Isospin in Particle Physics

1. What is Z° Isospin?

Z° Isospin, also known as T³=0, is a concept in particle physics that describes the symmetry between particles and their antiparticles. It is a fundamental property of subatomic particles, similar to charge and spin.

2. How is Z° Isospin different from regular Isospin?

Regular Isospin, or T³, describes the number of "up" and "down" quarks in a particle. Z° Isospin, on the other hand, refers to the total Isospin of a particle and its antiparticle, which is always zero. In other words, it represents the balance between particles and antiparticles in a system.

3. Why is Z° Isospin important in particle physics?

Z° Isospin is important because it helps us understand the symmetries and patterns in the behavior of subatomic particles. It also plays a crucial role in the study of strong interactions between particles, such as those in the atomic nucleus.

4. How is Z° Isospin measured?

Z° Isospin is measured using various experimental techniques, such as scattering experiments and particle accelerators. These experiments allow scientists to observe the behavior of particles and determine their Isospin values.

5. What are some examples of particles with Z° Isospin of T³=0?

Some examples of particles with Z° Isospin of T³=0 include the pion, the kaon, and the eta meson. These particles have corresponding antiparticles with opposite Isospin values, resulting in a total Isospin of zero for the particle-antiparticle pair.

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