A massive force carrying particle? The weak nuclear force, the W boson has mass?

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Discussion Overview

The discussion revolves around the properties of the W boson, a force-carrying particle associated with the weak nuclear force, particularly its mass, speed, and interactions with other particles. Participants explore theoretical implications and clarify concepts related to gauge bosons and their characteristics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants note that the W boson is the only force-carrying particle with mass, while the Z boson also has mass.
  • Questions are raised about whether the W boson can travel at the speed of light given its mass, with some participants suggesting it cannot.
  • There is a discussion about the implications of a massive W boson emitting other gauge bosons, with some arguing that it is possible due to its electric charge allowing it to couple with photons.
  • Clarifications are made regarding the W boson's properties, stating it is a spin 1 particle with an electric charge of +1 or -1.
  • One participant introduces the concept of virtual particles, suggesting that the W boson need not be a virtual particle but has a short lifetime, while another participant discusses the nature of virtual particles and their lack of velocity.
  • Concerns are expressed about the energy requirements for a massive particle to reach the speed of light, leading to the conclusion that it would require infinite energy and mass.

Areas of Agreement / Disagreement

Participants generally agree that the W boson cannot travel at the speed of light due to its mass, but there are differing views on the implications of this and the nature of virtual particles. The discussion remains unresolved regarding the specifics of boson interactions and the nature of mass in this context.

Contextual Notes

Some statements depend on interpretations of particle physics concepts, such as the distinction between real and virtual particles, and the implications of mass on particle behavior. There are unresolved questions about the interactions of gauge bosons and the conditions under which they operate.

filegraphy
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I was looking at the list of the force carrying particles and all of their masses read zero other than the W boson of the weak nuclear force.

Q: Does the W boson travel at the speed of light even if it is massive? (I am guessing not)
Q: If the W boson is massive then it emits other gauge bosons in a gravitational field. How can this be? A boson emit other bosons?
Q: Does the W boson have spin or charge?

Thank you for answering.
 
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filegraphy said:
I was looking at the list of the force carrying particles and all of their masses read zero other than the W boson of the weak nuclear force.

The Z boson also has mass.

filegraphy said:
Q: Does the W boson travel at the speed of light even if it is massive? (I am guessing not)

No, a W boson will not travel at the speed of light.

filegraphy said:
Q: If the W boson is massive then it emits other gauge bosons in a gravitational field. How can this be? A boson emit other bosons?

I don't really want to talk about gravitons, but a W boson has electric charge and so it couples directly to photons (see the next question). So there's no problem with a boson emitting other bosons.


filegraphy said:
Q: Does the W boson have spin or charge?

The W is a spin 1 particle with electric charge of +1 or -1. See the pdf that mathman linked to for more details.
 
the_house said:
No, a W boson will not travel at the speed of light.

why not, it is virtual and does not satisfy E^2 = P^2 + M^2
 
The W-boson need not be a virtual particle; it is only a particle with a rather short lifetime; but in that sense even neutrons are only virtual particles.

A virtual particle does not have a velocity at all. A virtual particle is not a single particle but a "bunch of all particles possible in momentum space" with an "integral over momentum space".
 
Thank you all for the answers. That makes sense that the W and Z bosons cannot travel at the speed of light because there fore would require infinite amount of energy to get it to that speed causing it to have an infinite amount of mass.
 

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