LHCb experiment discovers a new pentaquark (opens in new tab)

Usually quarks are confined in composite particles of two (mesons) or three (baryons) quarks. However they can also in certain conditions form particles of 5 quarks (the pentaquarks).

if you click through on the 'read more' to: http://lhcb-public.web.cern.ch/lhcb-public/Welcome.html#Pent...

including the detail that the quark state content is: "duucc: four quarks and one antiquark. "

Theres a further 'read more' link to a powerpoint, http://moriond.in2p3.fr/QCD/2019/TuesdayMorning/Skwarnicki.p... which is way out of my understanding

Penta = five. There's a picture of a ball with five balls in it. It decays to a proton (which as mentioned has three quarks) and another pair of a quark and an anti-quark. I'd say it's there.

The rap is pretty bad. It lists four questions: dark matter, matter-antimatter asymmetry (aka baryogenesis, related to CP violation), Higgs boson, and hierarchy problem (why gravity is so weak; rap alludes extra dimension).

We found Higgs boson, which is great. We are no closer to answer other three questions, and frankly, there was no reason to expect LHC to help there, it was all wishful thinking. Sure, it was possible, LHC would do what has never been done, but not very probable.