- #1
UniPhysics90
- 16
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For beta minus decay, I know the reaction is given by neutron -> proton+electron+anti(electron)neutrino.
This is an image of the Feynman diagram for the reaction:
[URL]http://tmp.kiwix.org:4201/I/280px_Beta_Negative_Decay_svg.png[/URL]
I get that the neutron changes to a proton releasing a w- boson. I think this decays into the electron and anti neutrino. Why then in this diagram is the direction of the arrow of the antineutrino 'backwards' so going back in time?
Thanks
This is an image of the Feynman diagram for the reaction:
[URL]http://tmp.kiwix.org:4201/I/280px_Beta_Negative_Decay_svg.png[/URL]
I get that the neutron changes to a proton releasing a w- boson. I think this decays into the electron and anti neutrino. Why then in this diagram is the direction of the arrow of the antineutrino 'backwards' so going back in time?
Thanks
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