K+ Decay: Is the Feynman Diagram I Drew Correct?

  • Context: Graduate 
  • Thread starter Thread starter billbray
  • Start date Start date
  • Tags Tags
    Decay Weak
Click For Summary

Discussion Overview

The discussion revolves around the correctness of a Feynman diagram drawn by a participant to represent the decay of a K+ meson. The focus is on the weak decay process and whether the diagram accurately depicts the involved particles and interactions.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant presents a Feynman diagram for the decay K+ -> u+ + Vu, suggesting it involves a W boson due to the weak interaction.
  • Another participant challenges the diagram, asserting that the decay should produce three pions (one plus and two minus), referencing an example from a CERN educational resource.
  • Some participants defend the original diagram, indicating that the challenger is referring to a different decay channel.
  • A later reply acknowledges a mistake in the previous challenge, reinforcing the correctness of the original diagram.

Areas of Agreement / Disagreement

The discussion features disagreement regarding the decay process depicted in the Feynman diagram, with multiple views on the correct decay channel. While some participants support the original diagram, others propose an alternative decay involving pions.

billbray
Messages
24
Reaction score
0
I've attached a feynman diagram i drew myself because i can't find a proper feyman diagram for this decay. I assume that since the decay K+->u+ + Vu is weak it goes via a W boson.

Is this diagram correct?

thanks
 

Attachments

  • KAON DECAY.JPG
    KAON DECAY.JPG
    9.9 KB · Views: 1,895
Physics news on Phys.org
The diagram is correct. IcedEcliptic is talking about another decay channel.
 
Vanadium 50 said:
The diagram is correct. IcedEcliptic is talking about another decay channel.

Sorry, my mistake.
 
thanks guys!
 

Similar threads

Undergrad How Does Beta Decay Relate to the Role of W Bosons in Weak Nuclear Force?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Are unstable particles ever really external lines in QFT?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad I don't understand this Feynman Diagram
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Beta/gamma decay probabilities
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How does the strange and anti-up quark produce a W-boson in K-minus decay?
  • · Replies 6 ·
Replies
6
Views
2K
High School What is meant by decay constant?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Dominant Feynman diagram for ##b \to s ~l^+ l^−##
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Confused about Feynman diagrams
  • · Replies 10 ·
Replies
10
Views
4K
Graduate D0-> K+ K- Decay Suppression - A Puzzling Question
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Beta plus and Beta minus decay
  • · Replies 6 ·
Replies
6
Views
3K