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A particle made of force: physicists say they've found mysterious 'glueball'
- chasil 2mo agohttps://archive.ph/9Lfum https://archive.ph/9Lfum
- lorenzohess 2mo ago> After almost two decades of searching, a team of physicists in China says it has observed strong evidence of a mysterious particle called a glueball, which is made entirely of force-carrying particles. > ... The discovery of glueballs would provide direct evidence that gluons can interact with themselves, researchers say. This is a key prediction of quantum chromodynamics
- strictnein 2mo ago> "quantum chromodynamics" I had to google it: "the study of the strong interaction between quarks mediated by gluons"
- _kulang 2mo agoIt’s the theory of colour charge essentially, counterpart to electrodynamics. Quarks have colour, rather than electrical charge. Mediating particle is the gluon, analogous to (but entirely different from) the photon
- throwawayffffas 2mo agoIts called chromodynamics because the interactions are described by the special unitary group of degree 3, which is the same group that describes how we perceive color interactions.
- mr_toad 2mo agoNow explain how quarks have flavour!
- cynicalkane 2mo agoIt's just the three dimensional nature of it plus the usual physics practice of giving things cheeky names. The vector space of (visible) colors is not acted symmetrically upon by SU(3); it doesn't transform symmetrically under charge-preserving unitary matrices. A blue strawberry with red leaves would not seem the same to us as a red strawberry with green leaves.
- amelius 2mo agoWhy do they call it a "mysterious glueball" if the theory predicted it?
- Synaesthesia 2mo agoBecause it's never been observed.
- not-kinsale-joe 2mo agomysterious: strange, not known, or not understood. They don't really know what it is or understand it.
- Hobadee 2mo agoAnd here I am, thinking I discovered "glueballs" in elementary school when we were given rubber cement to use.
- cat-whisperer 2mo agoare we going to have force-fields now?
- krapp 2mo agoNo.
- yndoendo 2mo agoI thought a Plasma Window is a form of force-field.
- GroksBarnacles 2mo agoPlasma is matter, not a force
- foobarian 2mo agoYet what is matter but a (strong) force
- krapp 2mo agoMatter is not a force. Matter and forces are two different things in physics. And the "strong force" is another thing altogether.
- aeonik 2mo agoI think their point might be that matter is what defines the location of the force field. I.e. it's the EM field doing the actual work.
- qsera 2mo agoYea, that is it, and I agree with them. When we say that a particle is at some x,y,z, we just mean that the space at that location behaves in a certain manner, for some reason. And since we don't like mysteries, we say that there is a "particle" there with so and so properties..
- hdivider 2mo agoIsn't it significant in some sense that this was discovered in China first, and not the US? In the sense of: we didn't know splitting the atom would change warfare forever, back when Einstein and others published on it. We don't know if there are discoveries of similar impact lying in wait somewhere. If China gets to such a discovery first, we are in Sputnik territory, to say the least.
- peterashford 2mo agoEinstein? Rutherford, I think
- ddddddrop 2mo agoWhy not let the man himself tell you (as a surrogate for Roosevelt) the story https://www.atomicarchive.com/resources/documents/beginnings/einstein.html https://www.atomicarchive.com/resources/documents/beginnings...
- peterashford 2mo agoAhh... I took "published" on splitting the atom to mean the scientific write up of having split the atom - which was Rutherford - rather than the looser meaning - having just written about the idea in general. My bad.
- colechristensen 2mo agoPlenty of things get discovered all over the world and this isn't a particularly earth shattering result. Discovering evidence of a particle predicted for 50 years is interesting but still pretty mundane. The LHC which is doing much of the particle physics discovery is in Switzerland and France, if you need to be reminded, not the US. The first strong force theory was published by Hideki Yukawa in Japan in 1935 (which won him the nobel prize) ... so uh, not exactly a sputnik problem. Sputnik problems (and the nuclear race) are engineering and industrial races, not fundamental physics ones.
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- germandiago 2mo agoAI-made?
- 4mitkumar 2mo agoThis led me on a 1.5 hours long, entertaining chat session with Gemini learning about stuff in Physics - hopefully without much hallucinations. But definitely with a lot of typical - "You have arrived at a great insight.." like egging on by the AI :D But learned a bunch about bosons, fermions, QCD, gluons, Kugelblitz, composite bosons and finally Noether’s Theorem on symmetry. Was a wild ride
- apparent 2mo agoHow do you plan to make this newfound knowledge 'stick'? Do you have enough relevant/related knowledge that you'll remember it? Or is there a way to have Gemini make a bunch of cards for use with spaced repetition software?
- ilteris 2mo agoYou can use Gemini notebook notebooklm for this
- apparent 2mo agoOh cool, will look into this. Have only used it to make podcasts in the past. I'm a little hesitant to build in a walled garden though. I'd rather store things in an open format that can be used with many platforms, not just the one.
- samuell 2mo agoYea, I like the quiz feature a lot. It feel more efficient than both the podcast one (which mostly creates a very superficial high level talk on a level I typically already grasp), and the flashcard one in my experience.
- amelius 2mo agoBest way is to build a particle collider in your back yard. If you don't have the budget, write a simulator.
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- jfkffkfktk 2mo ago[dead]
- bronlund 2mo agoOh no. A new particle. Who would have guessed %]
- ArtemKhymenko 2mo agoInteresting how should someone uses it IRL at the end of the day
- abc123abc123 2mo ago[flagged]