Talk:List of mesons: Difference between revisions

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Comments

If you want to get really anal about CP-violating terms, they appear for all mesons, not just kaons. Also, the standard mixing of the neutral pion and the eta is broken by quark mass terms. -- Xerxes 17:41, 2005 August 4 (UTC)

Good point. It's important historically for the kaons, though. I'll think about how to note this. -- SCZenz 18:32, 4 August 2005 (UTC)[reply]

Wait a minute... The CP-violating terms should only appear in the states of flavored neutral mesons, i.e. those that can mix with their antiparticles via box diagrams. Any meason has direct CP violation in its decays, also, but that's not too relevant to the table. So I just need notes for K, D, B,and B_s. Am I right about this? -- SCZenz 16:52, 5 August 2005 (UTC)[reply]

Yeah, that's right. Just the neutral mesons. -- Xerxes 19:08, 2005 August 5 (UTC)

And one doesn't talk about D-longs or B-shorts because the extra-long lifetime for one weak eigenstate is unique to kaons. Thus for the other neutrals, only the strong eigenstates are considered particles, and those are exactly as listed. I have put a brief note at the end of the kaon notes clarifying this point, and now think it's good as is. -- SCZenz 20:06, 5 August 2005 (UTC)[reply]

Table

Is there any way to make the table smaller? 24.126.199.129 03:37, 24 August 2006 (UTC)[reply]

Yeah, the notes could be numbered and made into footnotes. Maybe I should do that. -- SCZenz 03:38, 24 August 2006 (UTC)[reply]

References mistake

I don't have the book in front of me right now, but the Griffiths E&M book listed is surely a mistake? I used the book in undergraduate and don't recall a list of mesons. Perhaps one means his book on elementary particles? -Joshua Davis 22:29, 12 January 2007 (UTC)[reply]

Eta Prime Wavefunction

I got D.B. Lichtenberg's Unitary Symmetry and Elementary Particles (2nd Editition) before me and he lists the Eta Prime wave function as ${\frac {1}{2}}(u{\bar {u}}+d{\bar {d}}+s{\bar {s}}+c{\bar {c}})$ instead of ${\frac {1}{\sqrt {3}}}(u{\bar {u}}+d{\bar {d}}+s{\bar {s}})$ . Who's right? Headbomb (talk) 21:54, 3 April 2008 (UTC)[reply]

The PDG lists the eta-prime among the "light unflavored mesons" and suggests its quark content is a combination of $(u{\bar {u}}+d{\bar {d}}+s{\bar {s}})$ . The same source that I suggested is good for the baryon page is good for this page as well.
http://www.hep.phy.cam.ac.uk/~thomson/partIIIparticles/handouts/Handout8_2007.pdf
It lists the eta-prime as ${\frac {1}{\sqrt {3}}}(u{\bar {u}}+d{\bar {d}}+s{\bar {s}})$ --Vectorboson (talk) 14:12, 9 May 2008 (UTC)[reply]

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 I got D.B. Lichtenberg's Unitary Symmetry and Elementary Particles (2nd Editition) before me and he lists the Eta Prime wave function as <math>\frac{1}{2}(u\bar{u}+d\bar{d}+s\bar{s}+c\bar{c})</math> instead of <math>\frac{1}{\sqrt{3}}(u\bar{u}+d\bar{d}+s\bar{s})</math>. Who's right?  [[User:Headbomb|Headbomb]] ([[User talk:Headbomb|talk]]) 21:54, 3 April 2008 (UTC)
+The PDG lists the eta-prime among the "light unflavored mesons"  and suggests its quark content is a combination of <math>(u\bar{u}+d\bar{d}+s\bar{s})</math>.  The same source that I suggested is good for the baryon page is good for this page as well.<br />
+http://www.hep.phy.cam.ac.uk/~thomson/partIIIparticles/handouts/Handout8_2007.pdf<br />
+It lists the eta-prime as    <math>\frac{1}{\sqrt{3}}(u\bar{u}+d\bar{d}+s\bar{s})</math>--[[User:Vectorboson|Vectorboson]] ([[User talk:Vectorboson|talk]]) 14:12, 9 May 2008 (UTC)