Talk:Strangeness

[Sentence]

The sentence "Strangeness is conserved during the strong interaction and the electromagnetic interactions, but during the weak interactions associated with particle decay it is changed by 1 in either direction; isotopic spin is conserved only during the strong interactions." seems to imply strangeness is the same as isospin; Is that true or is it a mistake?

JeffBobFrank 02:30, 27 Mar 2004 (UTC)

Requested move

Strangeness (particle physics) → Strangeness — This page was moved without discussion about a year ago. It is the only article using this title, and every incoming link to Strangeness (except one user page that intends the non-physics dictionary definition) refers to the physics concept. The article should be returned to the plain title.--ShelfSkewed Talk 17:53, 18 June 2009 (UTC)

• I concur/agree/endorse/second/and so on.Headbomb {^ταλκ_{κοντριβς} – WP Physics} 18:01, 18 June 2009 (UTC)
• Me too, and add support to that. This is the only article that could possibly be named "strangeness" (barring a dicdef, of course). Jafeluv (talk) 21:46, 18 June 2009 (UTC)
• Given the incoming links, seems sensible enough. Knepflerle (talk) 23:22, 18 June 2009 (UTC)
• Makes sense. I don't remember my rationale a year ago, but it seems sensible now to move to just Strangeness. —Anonymous Dissident^Talk 01:21, 19 June 2009 (UTC)
• Move completed. I've added a {{otheruses4|a concept in particle physics|the definition of "strangeness"|wikt:Strangeness|other uses|Strange}} to the page to clear up any confusion. —Anonymous Dissident^Talk 04:14, 19 June 2009 (UTC)

formula for strangeness

I am not a pro with this whole quantum business, but i know a bit of math.

-(x-y) = y-x

assuming there is no reason for the order of the equation, why not distribute the negative sign and make the equation from, S = -(strange - anti-strange) to, S = anti-strange - strange

?? —Preceding unsigned comment added by 71.92.101.14 (talk) 08:16, 30 November 2009 (UTC)

You could write it this way and it would be valid, but the reason it's written this way is that its convenient to do so, and the minus sign is significant. By convention the sign of the Flavour quantum numbers is the same as the electric charge of the particle. For example, the strange quark has an electric charge of -1⁄3, so it has negative strangeness. The charm quark has an electric charge of +2⁄3, so it has positive charm.

Hence

$S=-(n_{s}-n_{\bar {s}}),$

and

$C=+(n_{c}-n_{\bar {c}}).$

Preserving the "particle minus antiparticle" order makes equations such as the expanded Gell-Mann–Nishijima formula (below) more easily readable, and so the order is usually preserved wherever encountered.

$Q={\frac {2}{3}}\left[(n_{u}-n_{\bar {u}})+(n_{c}-n_{\bar {c}})+(n_{t}-n_{\bar {t}})\right]-{\frac {1}{3}}\left[(n_{d}-n_{\bar {d}})+(n_{s}-n_{\bar {s}})+(n_{b}-n_{\bar {b}})\right]$

I hope that helps. Headbomb {^ταλκ_{κοντριβς} – WP Physics} 08:35, 30 November 2009 (UTC)

"Strangness" listed at Redirects for discussion

A discussion is taking place to address the redirect Strangness. The discussion will occur at Wikipedia:Redirects for discussion/Log/2020 October 21#Strangness until a consensus is reached, and readers of this page are welcome to contribute to the discussion. –LaundryPizza03 (dc̄) 16:24, 21 October 2020 (UTC)