I A question about a Feynman Diagram

1. Dec 27, 2017

heavybuilder

Could somebody explain me this?: Why is the arrow of the electron-antineutrino pointed towards the W-boson and not as in the second picture upwards?

This is my first post and also haven't learned too much about physics yet so please if anything is unclear hit me up.

Attached Files:

File size:
5.1 KB
Views:
78
• 220px-Beta_Negative_Decay.svg.png
File size:
5.3 KB
Views:
51
2. Dec 27, 2017

Staff Emeritus
Because somebody drew it backwards.

3. Dec 27, 2017

heavybuilder

The one that is drawn on is mine. The correct one should be the other one

4. Dec 28, 2017

Staff Emeritus
Then you drew it backwards.

The arrows indicate particle/antiparticle, not direction of motion.

5. Dec 28, 2017

heavybuilder

So if i get it right: If a W- boson decays like here the output will be an electron-antineutrino and an electron?

6. Dec 28, 2017

heavybuilder

Oh and another question, this picture is about muon capture but it isn't right is it? First of all there are no anti-leptons so it can't be right: L=1+1=2 second of all the muon isnt an antimuon so the arrow should be the other way around, shouldn't it?

File size:
7 KB
Views:
54