Gyromagnetic Ratio: Quarks, Gluons, Antiquarks

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Discussion Overview

The discussion revolves around the gyromagnetic ratio of quarks and gluons, exploring whether there are differences between quarks and antiquarks, as well as the implications of magnetic moments in various particles.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the gyromagnetic ratio of quarks and gluons and whether it differs between antiquarks and quarks.
  • Another participant asserts that gluons have no magnetic moment, resulting in a gyromagnetic ratio of zero, while the gyromagnetic moment of quarks is model-dependent, suggesting a Dirac-like model yields a ratio of 2 with potential corrections.
  • A similar claim about gluons having a gyromagnetic ratio of zero is reiterated, emphasizing the speculative nature of quark models and their anomalous moments.
  • A participant questions whether Z bosons and neutrinos also have a gyromagnetic ratio of zero due to their neutrality.
  • One response clarifies that neutrality does not imply a zero magnetic moment, using the neutron as an example of a neutral particle with a magnetic moment and a defined gyromagnetic ratio.
  • Another participant suggests that determining whether quarks and antiquarks have the same gyromagnetic ratio requires examining their symmetries.
  • A follow-up seeks clarification on the implications of symmetry in relation to the gyromagnetic ratio.

Areas of Agreement / Disagreement

Participants express differing views on the implications of magnetic moments and the conditions under which gyromagnetic ratios may differ, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are limitations regarding the assumptions made about quark models and the definitions of magnetic moments, which are not fully explored in the discussion.

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What is the gyromagnetic ratio of quarks and gluons ? Does the ratio differs between antiquarks and quarks ?
 
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Gluons have no magnetic moment, so the gyromangetic ratio is zero.
The gyromagnetic mooment of quarks depends on the model of a quark, which is still open for speculation. For point, Dirac-like quarks the gyromagnetic ratio would equal 2, with the same type of small correction like that for an electron or muon. If quarks have a different anomalous moment (like protons do), then the GR depends on the particular model.
 
Meir Achuz said:
Gluons have no magnetic moment, so the gyromangetic ratio is zero.
The gyromagnetic mooment of quarks depends on the model of a quark, which is still open for speculation. For point, Dirac-like quarks the gyromagnetic ratio would equal 2, with the same type of small correction like that for an electron or muon. If quarks have a different anomalous moment (like protons do), then the GR depends on the particular model.

By the same token, Z boson and neutrino has GR = 0 since it's neutral, right ?
 
Last edited:
Not because they are neutral, but because they have no mag moment.
The neutron is neutral, but has a mag moment and a GR.
 
To see whether they would have the same or different gyromagnetic ration, you need to see if they obey the same or different symmetries.
 
Gigi said:
To see whether they would have the same or different gyromagnetic ration, you need to see if they obey the same or different symmetries.

What do you mean ?
 

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