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A bestiary of exotic hadrons

(cerncourier.com)
152 points rbanffy | 3 comments | 20 Dec 24 15:29 UTC | HN request time: 0.418s | source
1. addaon ◴[20 Dec 24 16:07 UTC] No.42472268[source]▶
Are there a lot of missing overbars in this article, or some other typographic marker for antiquarks? I assume the hexaquark descriptions early on are supposed to be (using Q for q-overbar) "QQQqqq or qqqqqq", where it reads to me as "qqqqqq or qqqqqq".
replies(2): >>42472388 #>>42473073 #
2. cwillu ◴[20 Dec 24 16:19 UTC] No.42472388[source]▶
“Other manifestly exotic hadrons followed, with two exotic hadrons Tcccc(6600) and Tcccc(6900) observed by LHCb, CMS and ATLAS in the J/ψJ/ψ spectrum. They can be interpreted as a tetraquark made of two charm and two anti-charm quarks – a fully charmed tetraquark.”

Not sure if it was deliberate or not, but yeah.

3. dukwon ◴[20 Dec 24 17:38 UTC] No.42473073[source]▶
They are there in the print version (page 26) https://cerncourier.com/wp-content/uploads/2024/12/CERNCouri...