Where does the energy of a destroyed W boson go?

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Discussion Overview

The discussion revolves around the fate of energy when a W boson is destroyed, specifically addressing the energy difference between the W boson and the leptons produced in the process. Participants explore the implications of this energy transfer in the context of particle physics and weak interactions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions where the energy of the W boson (80.4 GeV) goes when it decays into an electron (0.511 MeV) and a neutrino (2.4 eV), suggesting it may convert to kinetic energy.
  • Another participant asks whether the reaction involving the W boson is exoenergetic or endoenergetic, proposing that it could be exoenergetic due to the energy required to create a radioactive atom.
  • A linguistic correction is offered regarding the term "excreted," with suggestions for more appropriate terminology such as "emitted" or "released."
  • One participant notes that W and Z bosons are often virtual, indicating that less energy is needed for their interactions, and discusses the relative strength of weak interactions compared to electromagnetism.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the energy transformation and the terminology used, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are unresolved questions regarding the energy accounting in particle decay processes and the definitions of exoenergetic versus endoenergetic reactions, which may depend on specific contexts or interpretations.

Macocio
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Hello.

I'm new so I am uncertain to which forum this post should be posted in so I'll just leave this here.

Anyways, I was reading about the four fundamental forces and it came to my mind that the W boson is 80.4 GeV, whilst the two lepton that are excreted upon destruction are 0.511 MeV (Electron) and 2.4 eV (The corresponding neutrino). So where does the 80.3994889976 GeV go when W is destroyed and excretes these two particle? Kinetic Energy?

I also noticed that a W boson excreted by another generation of fermion seems to also cause the boson to excrete another generation of leptons, why is this?
 
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The W boson is "excreted" in a reaction of the following type:

u -> d + W

Is this reaction exoenergetic or endoenergetic?
 
Macocio said:
the two lepton that are excreted

A friendly linguistic tip: in English we usually say "emitted" or "released" in this context.

"Excrete" is usually used to describe a certain body function that most people do about once per day. :smile:
 
Dickfore said:
The W boson is "excreted" in a reaction of the following type:

u -> d + W

Is this reaction exoenergetic or endoenergetic?

I do think that it is exoenergetic since the build up of a radioactive atom needs an external source of energy to create such an atom in the first place. The energy is stored in the build up of the atom so you might also consider it endoenergetic.

jtbell said:
A friendly linguistic tip: in English we usually say "emitted" or "released" in this context.

"Excrete" is usually used to describe a certain body function that most people do about once per day. :smile:

I knew that, only excrete came to my mind. xD But I guess you know what I mean.
 
Macocio said:
Hello.
So where does the 80.3994889976 GeV go when W is destroyed and excretes these two particle? Kinetic Energy?
Yes.
 
Also, often the W and Z bosons are virtual, so you don't really need that much energy lying around to use them.

In fact, weak interactions have roughly the same fundamental strength as electromagnetism. The reason it is "weak" at everyday scales is that W and Z require so much energy to create, that processes involving them are extremely virtual, meaning that they are heavily suppressed due to the "borrowing" of energy.
 

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