- #1
QuantumForumUser
- 8
- 0
Do the weak isospins of the w1 and w2 bosons combine as their fields combine?
What I meant was when the w1 and w2 bosons combine into the w+ and w- bosons through w+ or w- = (w1 -or+ iw2)/sqrt(2). The w+ has weak isospin +1 and the w- has weak isospin -1. So does that mean the weak isospins of the w1 and w2 can be found by rewriting the previously stated transformation (+or- 1= x -or+ iy/sqrt(2))?vanhees71 said:I don't know what you mean by that. You should look at some textbook how quantum flavor dynamics (the Glashow-Salam-Weinberg model of the electromagnetic and weak interactions) are constructed from the corresponding chiral gauge group ##\mathrm{SU}(2)_{\mathrm{wiso}} \times \mathrm{U}(1)_{\text{Y}}## and "Higgsed" to the ##\mathrm{U}(1)_{\mathrm{em}}## to give the particles and some of the gauge fields (the ##W^{\pm}## and ##Z## bosons) masse without violating the vital chiral local gauge symmetry of the model. A very good book on that is
https://www.amazon.com/dp/3540504966/?tag=pfamazon01-20
Does weak isospin make sense after you do the combination?QuantumForumUser said:So does that mean the weak isospins of the w1 and w2 can be found by rewriting the previously stated transformation (+or- 1= x -or+ iy/sqrt(2))?
Weak isospin (according to Wikipedia: https://en.wikipedia.org/wiki/Weak_isospin) is a conserved quantity. This means that the weak isospin values don't change whether symmetry breaking happens or not.ChrisVer said:Does weak isospin make sense after you do the combination?
QuantumForumUser said:Weak isospin (according to Wikipedia: https://en.wikipedia.org/wiki/Weak_isospin) is a conserved quantity. This means that the weak isospin values don't change whether symmetry breaking happens or not.
QuantumForumUser said:Weak isospin (according to Wikipedia: https://en.wikipedia.org/wiki/Weak_isospin) is a conserved quantity.
Actually, w[itex]\pm[/itex], w3 are the eigenstates of the weak isospin you are referring to ( which is the third component of the weak isospin - T3)QuantumForumUser said:According to my book on Electroweak Physics, the w1, w2, and w3 bosons form a weak isospin triplet. This probably means the w1 boson has weak isospin -1, the w2 has weak isospin 1, and the w3 has weak isospin 0.
are you sure that the W± are eigenstates of the weak isospin?ofirg said:Actually, w±\pm, w3 are the eigenstates of the weak isospin you are referring to ( which is the third component of the weak isospin - T3)
ChrisVer said:are you sure that the W± are eigenstates of the weak isospin?
if the [itex]W^{1,2,3}[/itex] are eigenstates of [itex]T^3[/itex] with eigenvalues [itex]1,-1,0[/itex] respectively, then:ofirg said:Unless someone knows otherwise, they are eigenstates of the third component of the weak isospin - T3
For example, the electric charge Q=T3+Y ( Y is the hypercharge)
Since Y=0 in this case, Q=T3. So the states with well defined electric charge also have well defined and equal T3.
The weak isospin of w1 and w2 refers to the quantum number that characterizes the weak interaction between elementary particles. It is related to the symmetry of the weak interaction and helps to explain the behavior of particles under this force.
The weak isospins of w1 and w2 combine through a mathematical operation called isospin addition. This involves adding the individual values of weak isospin for each particle, taking into account their charges and other properties, to determine the overall weak isospin of the system.
Understanding how the weak isospins of w1 and w2 combine is important for understanding the behavior of particles under the weak interaction. This can help us to better understand the fundamental forces of the universe and how particles interact with each other.
No, the weak isospins of w1 and w2 are not always conserved. They can change in certain interactions, such as during beta decay, where a neutron changes into a proton and emits a W boson, altering the weak isospin of the system.
The combination of weak isospins can affect the stability of particles by determining whether or not they can participate in certain interactions. For example, particles with zero weak isospin cannot interact via the weak force and are therefore more stable than those with non-zero weak isospin.