All Questions
Tagged with weak-interaction leptons
13 questions
2
votes
1
answer
74
views
How does a $\mu_R^-/\mu_L^+$ decay?
While studying SM, I was taught that weak force bosons $V=\{W^\pm,Z^0\}$ do not interact with right/left-chiral fermions/antifermions. For this reason, we cannot observe right-handed neutrinos (if ...
- 557
0
votes
0
answers
50
views
Can a positive $W$ boson and negative $W$ boson exchange a lepton, and release a charged lepton antilepton pair or neutrino antineutrino pair?
Would it be possible for two passing $W$ bosons with opposing charge to either release a neutrino and become the corresponding charged lepton and charged antilepton, or release a charged lepton, and ...
0
votes
1
answer
181
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Chirality in muon decay
Consider the muon decay process:
We assign the chirality according to the $W$ boson current: (i.e. P&S eq.(20.80))
$$J_W^{\mu+}=\frac{1}{\sqrt{2}}\bar{\nu}_{\mu L}\gamma^{\mu}\mu_L \quad J_W^{\mu-...
- 1,461
0
votes
1
answer
693
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How is this Yukawa coupling term invariant?
I have the seen the following term used to describe Yukawa coupling for the lepton and Higgs field:
$$ \epsilon_{ij}\phi^{i}\bar{e}_{R}f_{L}^{j} $$
Under $SU(2) \otimes U(1)$ and so expected the ...
0
votes
1
answer
971
views
Feynman diagram for the decay $\tau \rightarrow \nu_{\tau}\pi^+\pi^-\pi^-$
$$\tau \rightarrow \nu_{\tau}\pi^+\pi^-\pi^-$$
This is a possible decay mode of the $\tau$ lepton (see Wikipedia). Given that a neutrino is present this must be the weak interaction and therefore we ...
- 1,327
0
votes
1
answer
132
views
How can pure leptonic interactions be mediated by the weak force?
$\mu^+ \rightarrow e^+ + \nu_e + \bar \nu_\mu$
Consider the above decay, it is given in my lecture notes as a weak force interaction. I thought the weak force was only involved when quarks change ...
- 1,545
-1
votes
1
answer
161
views
Muon decay - Type of interaction
Why does weak interaction occur when a muon decays?
Why can't electromagnetic interaction occur when a muon decays?
5
votes
1
answer
979
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Is it at least theoretically possible for an electron and an antimuon or antitauon to annihilate?
In other words, can mismatched particles and antiparticles react with each other? What about an up quark and anti-down quark?
- 4,709
1
vote
1
answer
91
views
Are quarks in a doublet weak analogues to strong color states?
Quarks and gluons interact so frequently that it makes little sense to regard each color state as a unique fundamental particle. These interactions also do not change any of the quarks' other ...
- 413
1
vote
0
answers
91
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Why can't weak interaction bind neutrino and electron together? [duplicate]
According to wiki, unlike the other three interactions, weak interaction does not produce bound states. However, according to this and this, the weak force should be attractive between particles with ...
- 71
0
votes
1
answer
353
views
Is weak interaction the only interaction capable of changing the flavor of leptons?
I see this sentence in wiki about weak interaction:
It is the only interaction capable of changing the flavor of quarks.
So why only quarks? Why not leptons? Is there another interaction which can ...
- 71
1
vote
3
answers
165
views
How is each neutrino associated with a specific charged lepton?
For instance, why is an electron neutrino called that and what is its relationship with an electron?
- 119
0
votes
1
answer
103
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Lepton flavour violation
I was reading about the evidence of lepton flavour violation coming from the observation
of neutrino oscillations, and was wondering whether this could also lead to LVF in weak interactions or not. ...
- 45