5 ms·

When you mention nuclear forces, are you referencing weak force and strong force? Do we understand these forces at the same level that we understand electromagn

When you mention nuclear forces, are you referencing weak force and strong force? Do we understand these forces at the same level that we understand electromagnetism?

deleted 2y ago
[deleted]
btilly 2y ago
Yes. The Standard Model has completely explained all experiments involving them for around 50 years now. In fact the outstanding success of the Standard Model has posed its own problems - the lack of deviations from it makes it hard for experiments to point in a useful direction for better theories to be developed along.
- elashri 2y ago
  > the lack of deviations from it makes it hard for experiments to point in a useful direction for better theories to be developed along. We have anomalies (deviations from standard model) in many measurements done by several experiments. This is a good summary [1] from them up until now (sorry for the pay-walled) [1] https://www.nature.com/articles/s42254-024-00703-6 https://www.nature.com/articles/s42254-024-00703-6
- jcranmer 2y ago
  That's not quite accurate. There are a few things that the Standard Model doesn't exactly account for--neutrino oscillation being the most famous. The trouble is that these issues aren't really big enough to suggest new physics, and the experiments aren't good enough to really suggest how much patching actually needs to be done.
  - jraines 2y ago
    Also the unexpectedly large mass of the Higgs, which suggested (to string theorists), super symmetry. Which unfortunately turned out to not exist unless it’s at some configuration that’s quite different from what was suggested
    - pfdietz 2y ago
      I thought the Higgs had an unexpectedly small mass. https://home.cern/news/news/physics/incredible-lightness-higgs https://home.cern/news/news/physics/incredible-lightness-hig...
  - btilly 2y ago
    Yes, there are some deviations. But minor adjustments to the Standard Model handles those. And don't really point in the direction of a better theory. More relevantly to the previous question, I'm not aware of any of those which affect interactions with the strong or weak nuclear forces.
    - jcranmer 2y ago
      Neutrinos predominantly work via the weak interaction, don't they?

When you mention nuclear forces, are you referencing weak force and strong force? Do we understand these forces at the same level that we understand electromagnetism?

deleted 2y ago

[deleted]

btilly 2y ago

Yes. The Standard Model has completely explained all experiments involving them for around 50 years now. In fact the outstanding success of the Standard Model has posed its own problems - the lack of deviations from it makes it hard for experiments to point in a useful direction for better theories to be developed along.

elashri 2y ago
> the lack of deviations from it makes it hard for experiments to point in a useful direction for better theories to be developed along. We have anomalies (deviations from standard model) in many measurements done by several experiments. This is a good summary [1] from them up until now (sorry for the pay-walled) [1] https://www.nature.com/articles/s42254-024-00703-6 https://www.nature.com/articles/s42254-024-00703-6
jcranmer 2y ago
That's not quite accurate. There are a few things that the Standard Model doesn't exactly account for--neutrino oscillation being the most famous. The trouble is that these issues aren't really big enough to suggest new physics, and the experiments aren't good enough to really suggest how much patching actually needs to be done.
- jraines 2y ago
  Also the unexpectedly large mass of the Higgs, which suggested (to string theorists), super symmetry. Which unfortunately turned out to not exist unless it’s at some configuration that’s quite different from what was suggested
  - pfdietz 2y ago
    I thought the Higgs had an unexpectedly small mass. https://home.cern/news/news/physics/incredible-lightness-higgs https://home.cern/news/news/physics/incredible-lightness-hig...
- btilly 2y ago
  Yes, there are some deviations. But minor adjustments to the Standard Model handles those. And don't really point in the direction of a better theory. More relevantly to the previous question, I'm not aware of any of those which affect interactions with the strong or weak nuclear forces.
  - jcranmer 2y ago
    Neutrinos predominantly work via the weak interaction, don't they?