Association between W Boson Decay and Leptons

  • Context: Undergrad 
  • Thread starter Thread starter TDanskin
  • Start date Start date
  • Tags Tags
    Boson Decay W boson
Click For Summary

Discussion Overview

The discussion revolves around the decay processes of W bosons and their association with leptons and neutrinos. Participants explore the nature of these decays, the conservation laws involved, and whether the relationships between charged leptons and their corresponding neutrinos are solely due to W boson decays or if other processes are involved.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that W bosons decay into one of three charged anti-leptons and one of three neutrinos, questioning if this is the basis for the association of leptons with their neutrinos.
  • Another participant states that W bosons can decay into any combination of particles allowed by conservation laws, suggesting a broader range of decay products.
  • There is a query about whether W boson decays are restricted to an anti-lepton and its corresponding neutrino.
  • It is mentioned that W bosons can also decay into quarks, and if a (anti-)lepton is produced, the neutrino produced will always match the lepton's flavor.
  • Further discussion raises the possibility of other processes involving real or virtual W bosons contributing to the associations between leptons and neutrinos, beyond just W boson decays.
  • A participant references a scattering example from a textbook, indicating that there may be additional contexts for understanding these interactions.
  • Links to external resources are provided for further information on W boson decays and experimentally measured values.

Areas of Agreement / Disagreement

Participants express differing views on whether the association of leptons and neutrinos is solely due to W boson decays or if other processes are also relevant. The discussion remains unresolved regarding the full scope of interactions that may contribute to these associations.

Contextual Notes

Some claims rely on specific interpretations of conservation laws and the Standard Model, which may not be universally agreed upon. The discussion includes references to both theoretical frameworks and experimental data, but the implications of these references are not fully settled.

TDanskin
Messages
5
Reaction score
0
As a physics A Level student, I am interested in understanding particle physics. Recently I have read that a W boson, as a relatively heavy particle, decays into one of three charged anti-leptons, and one of the three neutrinos. If a W boson decays to form an anti-tau lepton, it will also form a tau neutrino. Is the association of electrons, muons and tau particles with their 'corresponding' neutrinos purely based on this decay of W bosons?
 
Physics news on Phys.org
W bosons decay into every possible combination of particles that is permitted by the conservation laws.
 
Thanks so is the decay of a W boson not restricted to an anti-lepton and it's neutrino?
 
You can also decay into quarks.

If you decay into a (anti-)lepton, the produced neutrino is always of the same flavour. This is what defines neutrino flavour.

Edit: And by "you" I mean the W ...
 
The other option is quark plus antiquark.
TDanskin said:
Is the association of electrons, muons and tau particles with their 'corresponding' neutrinos purely based on this decay of W bosons?
Or via other process that involve real or virtual W bosons. In the Standard Model, those are the only interactions that convert elementary particles into other particles.

Edit: For clarification: particle+antiparticle -> something else is not meant here, that happens via other bosons as well.
 
Last edited:
mfb said:
The other option is quark plus antiquark.Or via other process that involve real or virtual W bosons. In the Standard Model, those are the only interactions that convert elementary particles into other particles.
I could have sworn Peskin-Schröder had an early example of electromagnetic ##e^+e^-\rightarrow\mu^+\mu^-## scattering ...
Anyway, I know what you mean, but an entry level student might not.
 
  • Like
Likes   Reactions: vanhees71
Thank you, this is all really useful :-)
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 23 ·
Replies
23
Views
5K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 30 ·
2
Replies
30
Views
4K
  • · Replies 13 ·
Replies
13
Views
5K
  • · Replies 5 ·
Replies
5
Views
2K