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Added a diagram suggested by a commenter which helps to answer part of the question.
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Vielbein
Vielbein
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I am currently studying differential cross sections for my Nuclear Physics module. I'm looking an experiment where muon-neutrinos are interacting with nucleons in a scintillator producing muons (which then cause the scintillation to occur).

I went ahead and drew a Feynman diagram for the interaction:enter image description here

I've read that the direction of the boson (and whether it is $ W^+ $or $ W^- $) depends on the 4-momentum transfer. In this case high energy muon-neutrinos are interacting with low energy (static) neutrons.

So my question is: Should the boson be a $ W^+ $going from the neutrino to the neutron or a $ W^- $going doing the opposite? I was originally going to just write $ W^±$without a directionality arrow, is this too an accepted convention?

Any advice would be much appreciated! Thanks, Sean.

Edit: Here's a model example taken from http://danielscully.co.uk/thesis/interactions.html enter image description here

I am currently studying differential cross sections for my Nuclear Physics module. I'm looking an experiment where muon-neutrinos are interacting with nucleons in a scintillator producing muons (which then cause the scintillation to occur).

I went ahead and drew a Feynman diagram for the interaction:enter image description here

I've read that the direction of the boson (and whether it is $ W^+ $or $ W^- $) depends on the 4-momentum transfer. In this case high energy muon-neutrinos are interacting with low energy (static) neutrons.

So my question is: Should the boson be a $ W^+ $going from the neutrino to the neutron or a $ W^- $going doing the opposite? I was originally going to just write $ W^±$without a directionality arrow, is this too an accepted convention?

Any advice would be much appreciated! Thanks, Sean.

I am currently studying differential cross sections for my Nuclear Physics module. I'm looking an experiment where muon-neutrinos are interacting with nucleons in a scintillator producing muons (which then cause the scintillation to occur).

I went ahead and drew a Feynman diagram for the interaction:enter image description here

I've read that the direction of the boson (and whether it is $ W^+ $or $ W^- $) depends on the 4-momentum transfer. In this case high energy muon-neutrinos are interacting with low energy (static) neutrons.

So my question is: Should the boson be a $ W^+ $going from the neutrino to the neutron or a $ W^- $going doing the opposite? I was originally going to just write $ W^±$without a directionality arrow, is this too an accepted convention?

Any advice would be much appreciated! Thanks, Sean.

Edit: Here's a model example taken from http://danielscully.co.uk/thesis/interactions.html enter image description here

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Vielbein
Vielbein
  • 285
  • 4
  • 15

Neutrino-Neutron Interaction Feynman Diagram (W Boson Direction)

I am currently studying differential cross sections for my Nuclear Physics module. I'm looking an experiment where muon-neutrinos are interacting with nucleons in a scintillator producing muons (which then cause the scintillation to occur).

I went ahead and drew a Feynman diagram for the interaction:enter image description here

I've read that the direction of the boson (and whether it is $ W^+ $or $ W^- $) depends on the 4-momentum transfer. In this case high energy muon-neutrinos are interacting with low energy (static) neutrons.

So my question is: Should the boson be a $ W^+ $going from the neutrino to the neutron or a $ W^- $going doing the opposite? I was originally going to just write $ W^±$without a directionality arrow, is this too an accepted convention?

Any advice would be much appreciated! Thanks, Sean.