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Specifically [1]. I'm not saying it's wrong, but I'm saying its different from what was there before. No citation is provided for this (either way), so a) which is right? b) anyone got a citation? Headbomb { ταλκ κοντριβς – WP Physics} 22:24, 23 February 2009 (UTC)
On a more general note, this article is completely unreferenced. Nothing strikes me as false, but we should find something, at the very least an external link. Headbomb { ταλκ κοντριβς – WP Physics} 01:27, 24 February 2009 (UTC)
Relation was changed to where X is some undescribed "GUT-associated conserved quantum number".
Since weak hypercharge is , first relation holds for all known particles:
From this it follows that holds for all known particles and that X from the second relation is indeed an conserved quantum number — it is always equal to 3(B−L), so it's addition seems unnecessary. -- 93.138.216.166 ( talk) 11:59, 3 October 2009 (UTC)
(Undent) We don't have an article about Weight diagram but we do have an article about root system. A root system is nothing more than the set of (non-vanishing) weights of the adjoint representation of a group.
The picture to the left (from the root system article) will likely look familiar. That's the SU(3) octet that can also be seen at the articles Eightfold Way (physics), Baryon, and Meson. A2 is another name for SU(3). Those diagrams are not too hard to visualise because SU(3) space is bidimensional (yes, bidimensional - the quark article needs to be fixed because it claims incorrectly that the color space is three-dimensional). SO(10) space is 5-dimensional which makes it a little harder to visualise the weight diagram structure (5-dimensional screans are not an standard feature of most modern laptops). That's why I labeled the conections between the vertices of diagrams with numbers from 1 to 5 and also color-coded them to make easy to identify the respective eigenvalues (listed inside of the boxes on the vertices). For the SU(3) group those eigenvalues would be Hypercharge and Isospin, for instance. For the SO(10) group, five eigenvalues are necessary to completely label the vertices (By convetion we use twice the values of the five different isospin components to avoid fractions). To see the relationship of that to the Standard Model simply remove the conections labeled 2 (yellow) and 5 (green). These are the generators associated with the part of the symmetry that must be broken in order to reduce SO(10) to the Standard Model. The remaining generators are associated with color SU(3) (blue and purple) and weak isospin (red). Weak hypercharge is given by which also gives us , , and . Dauto ( talk) 18:19, 27 October 2009 (UTC)
The table has no apparent connection to the article. I actually came to this article because I am trying to understand the relationship between weak charge, weak isospin, parity, and handedness. So, while I have a vague understanding of what eR means, most people will not. I also question whether the values of T3 for the quarks are correct? Perhaps I've confused T3 with T (weak isospin, total) but I'm pretty sure I've run across several references in WIKIPEDIA which state T3 is +/- ½ for the quarks?? So, the table should either be removed or preferably discussed/explained in the article (as well as corrected, if wrong). A reference SHOULD really be provided, also. I'd also suggest expanding it to include both T and T3, as well as noting that isospin and weak isospin are unrelated (?!) in the text. Abitslow ( talk) 17:28, 6 March 2015 (UTC)
This
level-5 vital article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
Specifically [1]. I'm not saying it's wrong, but I'm saying its different from what was there before. No citation is provided for this (either way), so a) which is right? b) anyone got a citation? Headbomb { ταλκ κοντριβς – WP Physics} 22:24, 23 February 2009 (UTC)
On a more general note, this article is completely unreferenced. Nothing strikes me as false, but we should find something, at the very least an external link. Headbomb { ταλκ κοντριβς – WP Physics} 01:27, 24 February 2009 (UTC)
Relation was changed to where X is some undescribed "GUT-associated conserved quantum number".
Since weak hypercharge is , first relation holds for all known particles:
From this it follows that holds for all known particles and that X from the second relation is indeed an conserved quantum number — it is always equal to 3(B−L), so it's addition seems unnecessary. -- 93.138.216.166 ( talk) 11:59, 3 October 2009 (UTC)
(Undent) We don't have an article about Weight diagram but we do have an article about root system. A root system is nothing more than the set of (non-vanishing) weights of the adjoint representation of a group.
The picture to the left (from the root system article) will likely look familiar. That's the SU(3) octet that can also be seen at the articles Eightfold Way (physics), Baryon, and Meson. A2 is another name for SU(3). Those diagrams are not too hard to visualise because SU(3) space is bidimensional (yes, bidimensional - the quark article needs to be fixed because it claims incorrectly that the color space is three-dimensional). SO(10) space is 5-dimensional which makes it a little harder to visualise the weight diagram structure (5-dimensional screans are not an standard feature of most modern laptops). That's why I labeled the conections between the vertices of diagrams with numbers from 1 to 5 and also color-coded them to make easy to identify the respective eigenvalues (listed inside of the boxes on the vertices). For the SU(3) group those eigenvalues would be Hypercharge and Isospin, for instance. For the SO(10) group, five eigenvalues are necessary to completely label the vertices (By convetion we use twice the values of the five different isospin components to avoid fractions). To see the relationship of that to the Standard Model simply remove the conections labeled 2 (yellow) and 5 (green). These are the generators associated with the part of the symmetry that must be broken in order to reduce SO(10) to the Standard Model. The remaining generators are associated with color SU(3) (blue and purple) and weak isospin (red). Weak hypercharge is given by which also gives us , , and . Dauto ( talk) 18:19, 27 October 2009 (UTC)
The table has no apparent connection to the article. I actually came to this article because I am trying to understand the relationship between weak charge, weak isospin, parity, and handedness. So, while I have a vague understanding of what eR means, most people will not. I also question whether the values of T3 for the quarks are correct? Perhaps I've confused T3 with T (weak isospin, total) but I'm pretty sure I've run across several references in WIKIPEDIA which state T3 is +/- ½ for the quarks?? So, the table should either be removed or preferably discussed/explained in the article (as well as corrected, if wrong). A reference SHOULD really be provided, also. I'd also suggest expanding it to include both T and T3, as well as noting that isospin and weak isospin are unrelated (?!) in the text. Abitslow ( talk) 17:28, 6 March 2015 (UTC)