M Physics 21: 'Flaw' in Theory of the Strong Force- pQCD?

Posted by kx21 on December 29, 2003 at 01:37:00:

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* M Physics 21
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'Flaw' in Theory of the Strong Force- pQCD?

Given

'Interestingly, the researchers applied their new neutron data, along with existing proton data, to find out more about the proton. Their conclusions: the spins of the proton's two valence up quarks are aligned parallel to the overall proton spin, but the same is not true for the proton's valence down quark (see image).

This result disagrees with predictions from an approximation of perturbative quantum chromodynamics (pQCD), a widely accepted theory of the strong force (which holds the nucleon together). This approximation does not account for the quarks' orbital angular momenta, which describes the orbital paths of quarks inside the nucleon.'

*** Quark Spin in a Proton ***

kx21

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Follow Ups: (Reload page to see most recent)

• I Link:- Physics: We Don't Get It, Either -- kx21 12/29/03 (7)
  • Re: I Link:- Physics: We Don't Get It, Either -- DickT 12/29/03 (6)
    • Re: I Link:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- kx21 12/30/03 (4)
      • Re: I Link:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- DickT 12/30/03 (1)
        • Took a bit:) -- sol 12/30/03 (0)
      • I Link:- Earth's Inconstant Magnetic Field ( 29 Dec. 2003/ NASA) -- kx21 12/30/03 (1)
        • Is this the Answer? -- sol 12/30/03 (0)
    • GPx21k- SR&GR:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- kx21 12/29/03 (0)

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