Talk:Theta meson

Hadron overhaul

Please give input at Talk:Hadron#Hadron overhaul. Thanks. Headbomb {^ταλκ_{κοντριβς} – WP Physics} 02:00, 24 January 2010 (UTC)

Name

Is this name used anywhere outside Wikipedia, or even anywhere outside this article and the particle template? In T meson it is called toponium, which would follow the usual naming scheme, and toponium redirects to quarkonium instead of this article. Searching for toponium easily finds references in the literature. I suggest moving this to Toponium. Ping at User:Dukwon who recently shifted this entry in the template. --mfb (talk) 13:34, 19 February 2017 (UTC)

The PDG naming scheme for hadrons assigns the names $\eta _{t}$, $h_{t}$, $\theta$ and $\chi _{t}$ to toponium states, following the same convention as charmonium and bottomonium. Dukwon (talk) 14:45, 19 February 2017 (UTC)

Okay, thanks for improving the article. I had a look at the existing states in the template. Is there a reason we have J/Psi in it, but none of the other charmonium states? Same question for the other quarkonia. --mfb (talk) 15:49, 19 February 2017 (UTC)

The pion and the upsilon are mentionned. We basically mention the lowest states of quarkonia. Headbomb {talk / contribs / physics / books} 20:02, 19 February 2017 (UTC)

J/Psi is not the lowest energy charmonium state. The Upsilon is not the lowest energy bottomium state. They are just the easiest states to observe as they have spin 1 and a large branching fraction to leptons. --mfb (talk) 22:34, 19 February 2017 (UTC)

Brain fart there, I meant J^PC = 0⁻⁺ and J^PC = 1⁻⁻ mesons. The flavoured etas are covered in the eta page (which I never liked), personally. Headbomb {talk / contribs / physics / books} 00:47, 20 February 2017 (UTC)

Mmmm apparently the flavour etas aren't covered anywhere. I could have sworn they were in the eta/eta prime page. Headbomb {talk / contribs / physics / books} 00:50, 20 February 2017 (UTC)

The discovered toponium is eta-top, not theta

The toponium state discovered at CERN has Jpc = 0-+ and is therefore the ηt meson, not theta.

However, no page seems to exist for eta-top; a link on the meson page redirects and eventually loops back to itself.

Since it is likely that eta-top is the *only* top quark hadron that exists, I would suggest renaming this page eta-top and adjusting the quantum numbers. HPA (talk) 15:00, 10 August 2026 (UTC)