LHCb experiment discovers a new pentaquark(home.cern) |
LHCb experiment discovers a new pentaquark(home.cern) |
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
Are these goals still accurate or has new knowledge and engineering changed the goals of the detectors?
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.
This "colour" means colour charge, it doesn't have any relation to the regular meaning of "colour of light".
Color charge is essentially as charge. I.e. instead of having +/- you have A/B/C. Except you also have Anti A/B/C.
They can also be in fours. Possibly other configurations; the four and five quark configurations were theorized in 1964 but only confirmed in 2014 & 2015.
> Any reason that could be stated in layman's terms?
None at all, in fact, the source article does so: “In the conventional quark model, composite particles can be either mesons formed of quark–antiquark pairs or baryons formed of three quarks. Particles not classified within this scheme are known as exotic hadrons. When Murray Gell-Mann proposed the quark model in his fundamental 1964 paper, he mentioned the possibility of exotic hadrons such as pentaquarks, but it took 50 years to demonstrate their existence experimentally.”
(There is slightly more detail on the read more link, too.)
> None at all, in fact, the source article does so ….
Did you really mean "None at all"? The rest of your post seems to say the opposite.
Any whole number of terms greater than 1 will allow this, by the way.
Shouldn't there be +2/3 and -2/3 charges as well? Otherwise the only way to do this is with an equal number of +1/3 and -1/3 charges (so not 5 total, for example).
It's just a quick rule for showing how many quarks can fit together, not what kinds of quarks they are.
https://profmattstrassler.com/articles-and-posts/largehadron...
I'm sorry; although you very clearly referred to winding up with a whole number, I somehow read it as winding up with 0.