A particle made of force: physicists say they've found mysterious 'glueball' (nature.com)

140 points by Brajeshwar 6 days ago

lorenzohess 15 hours 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 13 hours ago

> "quantum chromodynamics"

I had to google it: "the study of the strong interaction between quarks mediated by gluons"

_kulang 10 hours ago

It’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 44 minutes ago

Its 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.

amelius 3 hours ago

Why do they call it a "mysterious glueball" if the theory predicted it?

Synaesthesia 2 hours ago

Because it's never been observed.

not-kinsale-joe 2 hours ago

mysterious: strange, not known, or not understood.

They don't really know what it is or understand it.

4mitkumar 7 hours ago

This 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 6 hours ago

How 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?

amelius 3 hours ago

Best way is to build a particle collider in your back yard. If you don't have the budget, write a simulator.

ilteris 6 hours ago

You can use Gemini notebook notebooklm for this

samuell 3 hours ago

apparent 6 hours ago

chasil 16 hours ago

hdivider 11 hours ago

Isn'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.

jhoechtl 9 hours ago

It's foundational science. The US scuence system calls for utility and time to merket. In such a system there is little space for gluons.

SoftTalker 7 hours ago

We knew. That's why Roosevelt started the Manhattan project after scientists wrote to him warning about it, to be sure that the Germans or the Soviets didn't develop it first.

peterashford 9 hours ago

Einstein? Rutherford, I think

ddddddrop 4 hours ago

Why not let the man himself tell you (as a surrogate for Roosevelt) the story

https://www.atomicarchive.com/resources/documents/beginnings...

wiml 9 hours ago

But nuclear fission was discovered by scientists working in Nazi Germany (except Meitner who had fled to Sweden by then).

colechristensen 10 hours ago

Plenty 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.

lukeify 6 hours ago

> 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.

Which is ironically an example of particle collider science happening overseas primarily because the US relinquished its lead on scientific discovery, despite having a similar-scale particle collider practically finished and ready to go [0].

[0]: https://en.wikipedia.org/wiki/Superconducting_Super_Collider

voidUpdate 4 hours ago

kakacik 3 hours ago

prometheus1992 10 hours ago

you are trying to see something that's not quite there in this case. there is shit ton of very good research that happens all over the world. but i also sympathize with what you are trying insinuate and that's also probably happening.

EA-3167 10 hours ago

HEP is undeniably an international effort, and it's silly to try and spin this into something akin to the space race. While this is a useful and frankly brilliant potential confirmation of existing theory, that's what it is: confirmation (sort of). Without CERN, without universities across the world including all across Asia none of this would be possible.

Very few endeavors are as truly international as this because the problems are so hard to even explore, and the machines required to do so are the most complex and highly engineered on Earth. Lets not lose that international spirit in science because the blowhard narcissists who run our countries would find that temporarily useful to them.

ArtemKhymenko 2 hours ago

Interesting how should someone uses it IRL at the end of the day

cat-whisperer 12 hours ago

are we going to have force-fields now?

throwawayffffas 38 minutes ago

We have them now. You are not floating into space because of one right now. Also magnets.

krapp 12 hours ago

No.

yndoendo 12 hours ago

I thought a Plasma Window is a form of force-field.

CoastalCoder 7 hours ago

GroksBarnacles 11 hours ago

germandiago 9 hours ago

AI-made?

bronlund 5 hours ago

Oh no. A new particle. Who would have guessed %]

Hobadee 13 hours ago

And here I am, thinking I discovered "glueballs" in elementary school when we were given rubber cement to use.