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An italic capital S, counting strange quarks with a sign flip.
Also known as: Strangeness, S quantum number, Strange quark number
Strangeness counts strange quarks, but with an inherited sign error: a strange quark has strangeness minus one, because the convention was fixed before quarks were known. Nobody has ever corrected it.
Collides with entropy, action and total spin, all written with a capital S.
Contexts: Laboratory
Denotes strangeness, a flavour quantum number conserved by the strong and electromagnetic interactions and violated by the weak.
Contexts: Laboratory
Assigns −1 to the strange quark rather than +1, a sign convention fixed before the quark model and never revised.
Contexts: Laboratory
An italic capital letter S, a double curve reversing at the middle.