Predicting the charge of a W boson

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    Boson Charge W boson
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Discussion Overview

The discussion revolves around the charge of W bosons in various particle interactions, specifically in the context of beta decay, proton-electron capture, and neutrino interactions. Participants explore the roles of W bosons in these processes and express confusion regarding the governing rules for their charges.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant notes the presence of W- bosons in beta-minus decay and W+ bosons in beta-plus decay, questioning the consistency of these assignments.
  • Another participant suggests a reaction involving proton and electron capture, proposing that an electron turns into a W- boson and a neutrino, but expresses uncertainty about whether a W+ boson is involved instead.
  • A different participant questions the charge resulting from a W+ boson interacting with an up quark, suggesting a charge of +5/3, indicating confusion about the implications of this interaction.
  • One participant describes the emission of a W- boson from a neutron, explaining its role in forming an electron and an electron anti-neutrino, while also mentioning the transformation of a down quark into an up quark to form a proton.

Areas of Agreement / Disagreement

Participants express differing views on the charge of the W boson in specific interactions, indicating that multiple competing interpretations exist without a clear consensus on the governing rules.

Contextual Notes

Some claims rely on specific interpretations of particle interactions, and there may be missing assumptions regarding the definitions and roles of the particles involved. The discussion does not resolve the mathematical or conceptual uncertainties presented.

tmonk
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For my Physics exam, I need to know 3 Feynman diagrams: beta-plus/minus decay, proton electron capturing, and neutrinos interacting with matter.

I know that there's a W- in \beta- decay, W+ in \beta+ decay, which seems logical.

However, in proton electron capture there is a W+ boson, and in a neutron-neutrino collision there is a W-. There seems to be no rule governing the charge of the boson.

If there is, could someone please let me know!
 
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p + e -> n + nu

?

then the electron would turn into a W- and a nu where the W- interacts with the quark
 
ansgar said:
p + e -> n + nu

?

then the electron would turn into a W- and a nu where the W- interacts with the quark

I thought it was a W+ boson in this case, which turns the u into a d?
 
u plus w+ gives something with +5/3 charge... right?
 
When a W negative boson is emitted from a neutron it forms an electron and an electron anti neutrino. This causes the down quark from the neutron to turn into a up quark to form a proton. This is the energy released in radioactive decay. That is all I can do. http://en.wikipedia.org/wiki/Weak_interaction
 

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