A question about a Feynman Diagram

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SUMMARY

The discussion centers on the interpretation of Feynman Diagrams, specifically regarding the direction of arrows representing particles and antiparticles. Participants clarify that the arrows indicate particle types rather than motion direction, with a focus on the W-boson decay producing an electron and an electron-antineutrino. Misinterpretations of diagrams, particularly concerning muon capture and the presence of anti-leptons, are also addressed, emphasizing the importance of correct arrow orientation in particle physics representations.

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heavybuilder
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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?

200604-0381886c10f70a8a3fbc138b06ad0374.jpg

200603-561b1be3b60e68d907c72417e7e94a26.png


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

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Because somebody drew it backwards.
 
Vanadium 50 said:
Because somebody drew it backwards.
The one that is drawn on is mine. The correct one should be the other one
 
Then you drew it backwards.

The arrows indicate particle/antiparticle, not direction of motion.
 
So if i get it right: If a W- boson decays like here the output will be an electron-antineutrino and an electron?
 
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 isn't an antimuon so the arrow should be the other way around, shouldn't it?
200630-00635183a59201057a813a392e7dc67f.jpg
 

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