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A particle made of force: physicists say they've found mysterious 'glueball'

nature.com

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Re: A particle made of force: physicists say they've found mysterious 'glueball'

#41

Post by kakacik »

lukeify wrote: post #32
colechristensen wrote: post #13

Earlier quoted context omitted.

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 (whic…

> 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/Supercond…

That would be classical 80:20 or more like 90:10 rule, few kms of tunnels ain't close to delivery in any feasible way, just the first baby steps.

The amount of continuous effort (and budget) that goes into just keeping CERN up and delivering is non-trivial. I live nearby and sometimes chat with folks working there (its >15,000 folks although not all do science).

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#42

Post by amelius »

apparent wrote: post #30
4mitkumar wrote: post #29

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

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?

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

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#43

Post by samuell »

ilteris wrote: post #31
apparent wrote: post #30

Earlier quoted context omitted.

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?

You can use Gemini notebook notebooklm for this

Yea, 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.

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#44

Post by amelius »

lorenzohess wrote: post #3

> 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

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

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#45

Post by amelius »

kakacik wrote: post #41
lukeify wrote: post #32

Earlier quoted context omitted.

> 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/Supercond…

That would be classical 80:20 or more like 90:10 rule, few kms of tunnels ain't close to delivery in any feasible way, just the first baby steps. The amount of continuous effort (and budget) that goes into just keeping CERN up and delivering is non-trivial. I live nearby and sometimes chat with folks working there (its >15,000 folks although not all do science).

Well they have plenty of spare time to do things like, for example, invent the web browser.

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#46

Post by defrost »

amelius wrote: post #45
kakacik wrote: post #41

Earlier quoted context omitted.

That would be classical 80:20 or more like 90:10 rule, few kms of tunnels ain't close to delivery in any feasible way, just the first baby steps. The amount of continuous effort (and budget) that goes into just keeping CERN up and delivering is non-trivial. I live nearby and sometimes chat with folks working there (its >15,000 folks although not all do science).

Well they have plenty of spare time to do things like, for example, invent the web browser.

That was a time saving part and parcel of the job of exchanging text and images between researchers.

If you're reaching for examples of spare time activities, this was squeezed into 20 minutes of downtime: https://www.youtube.com/watch?v=1e1eLe1ihT0

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#47

Post by TheOtherHobbes »

qsera wrote: post #34
aeonik wrote: post #15

Earlier quoted context omitted.

I 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.

Yea, 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..

It's more like "behaved", because particle measurement events are always historic. Quantum fields are statistical distributions of possible future particle measurement events within spacetime.

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#48

Post by Synaesthesia »

amelius wrote: post #44
lorenzohess wrote: post #3

> 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

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

Because it's never been observed.

Re: A particle made of force: physicists say they've found mysterious 'glueball'

#49

Post by not-kinsale-joe »

amelius wrote: post #44
lorenzohess wrote: post #3

> 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

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

mysterious: strange, not known, or not understood.

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

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