Wikidata talk:WikiProject Physics/List of particles

Auto tree of particles

Have a look here: elementary particles for a auto version of the tree (if all subclasses are set in the right way). Yours--Petermahlzahn (talk) 14:16, 21 May 2014 (UTC)

A second list with use of instance of (P31) is here. By the way: We should discuss the use of correct use of subclass of (P279) and instance of (P31) for elementary particles. --Petermahlzahn (talk) 14:22, 21 May 2014 (UTC)

@Petermahlzahn: - Nice work! The tree looks great already. Where would you place antiquarks? Tobias1984 (talk) 14:27, 21 May 2014 (UTC)

Yes it is a nice work but not mine. For antiquarks look to Structure, please --Petermahlzahn (talk) 19:58, 21 May 2014 (UTC)

Structure

@Tobias1984: As I’m actually learning Object oriented Programming I would suggest the following: The particles should should all be instance of (P31) some “class” and these classes should be recursively subclass of (P279) the root class elementary particle (Q43116). Antiparticle should be opposite of (P461) corresponding particle but also instance of (P31) some “class”. E.g.

• electron (Q2225) instance of (P31) lepton (Q82586) subclass of (P279) fermion (Q44363) subclass of (P279) elementary particle (Q43116)
• top antiquark (Q11905754) opposite of (P461) top quark (Q6778)
• top antiquark (Q11905754) instance of (P31) antiquark (Q2052084) subclass of (P279) quark (Q6718) subclass of (P279) fermion (Q44363) subclass of (P279) elementary particle (Q43116)
  (because antiquarks are also quarks)

Recently the particles are mostly subclass of (P279) a class. --Petermahlzahn (talk) 19:58, 21 May 2014 (UTC)

@Petermahlzahn: - Looks good to me. Starting with p31 for the lowest member of a classification is I think the way to go. Although "instance" has to be taken in a rather abstract way when talking about particles, because usually nobody talks about an individual particle. I noticed that our subclass-tree goes up to "subatomic particle" (http://tools.wmflabs.org/wikidata-todo/tree.html?q=177013&rp=279), but we haven't set a subclass for it yet. Any ideas? Tobias1984 (talk) 20:55, 21 May 2014 (UTC)

@Tobias1984: Maybe the en:List of particles can help us. But fermions and bosons are not subclasses of elementary particle, so I removed the corresponding items.
You are right: we could also let it as it is by using subclass of (P279) as starting point. Geschmackssache ;)
A upper class for subatomic particle (Q177013) may be particle (Q1621273).
Another issue for discussing (maybe later) is the part of (P361) property.--Petermahlzahn (talk) 21:44, 21 May 2014 (UTC)