Does Conservation Hold True for W Boson Spin Changes during Beta Decay?

In summary, during beta decay, a quark's spin is changed and the mass/energy difference is converted to a W boson, which quickly decays into an electron/positron and an anti-neutrino/neutrino. The energy is conserved through E=mc^2, but the W boson does not exist in a meaningful manner due to the low energies involved. The dominant contribution to beta decay is the exchange of a virtual W boson. The type of quark is changed, and while the spin can also change, it is not a rule. The spin quantum number remains the same, but the spin components are often averaged out in calculations.
  • #1
Kiley
29
3
Is this true?:
During beta decay a quarks' spin is changed and the mass/ energy difference is converted to a W boson which quickly decays into an electron/positron and an anti neutrino/neutrino. The mass/ energy is conserved through E=mc^2.
 
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  • #2
You really cannot say that the W exists in any meaningful manner. The energies involved in beta decay are far below that necessary to create a real W boson. However, the dominant contribution to beta decay is the exchange of a virtual W boson.
 
  • #3
Thanks for your reply, would the other parts of my explanation be correct?
 
  • #4
The type of quark is changed, not its spin.

The isospin changes (which is a fancy name for saying the type changes).
 
  • #5
Awesome, thank you for your reply mfb!
 
  • #6
I think the spin can also change, but it's not a rule (as there are W bosons with spin component 0 and with spin component +/-1)... the +/-1 should flip the spin of the quark, the 0 should keep it as it is. The spin quantum number though remains the same, for example both d and u-quarks have spin=1/2 (as all quarks and known fundamental fermions) , with components +/-1/2 each. Of course most of the times the spin-components are averaged out in calculations.
 

What is Conservation?

Conservation is the principle that states that certain physical quantities, such as energy and momentum, remain constant in a system unless acted upon by an external force.

What is a W boson?

A W boson is a type of elementary particle that is responsible for the weak nuclear force. It has a positive or negative charge and is involved in processes such as radioactive decay and nuclear fusion.

Why is conservation important in relation to W bosons?

Conservation is important in relation to W bosons because they are subject to the laws of conservation, just like all other particles. In particular, the conservation of electric charge and lepton number must be maintained in interactions involving W bosons.

What is the role of W bosons in conservation of energy?

W bosons play a crucial role in the conservation of energy by carrying energy between particles during interactions. This helps to maintain the total energy of a system, as required by the principle of conservation.

How do scientists study conservation and W bosons?

Scientists study conservation and W bosons through experiments, such as those conducted at the Large Hadron Collider. They also use mathematical models and theories, such as the Standard Model, to understand the behavior of these particles and their role in conservation principles.

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