Weak Interactions and Modern Particle Theory by Howard Georgi

[Dauphin]

[Ecthy]

Do physicists still wet their pants about newly-invented particles? Hadrones?

If QED is quantum electro dynamics, then what is QCD? More invented stuff?

[Jon Miller]

quantum chromodynamics

JM

[Ecthy]

More made up stuff I see. What was that about "dark energy"? Is that what makes space dark?

[KrazyHorse]

No, it drives the acceleration of the Universe's expansion.

[KrazyHorse]

Originally posted by Ecthy
Do physicists still wet their pants about newly-invented particles? Hadrones?

Hadrons are newly-invented particles?

I suppose 89 years since the discovery of the proton may be considered "newly-invented" if you're Amish.

[Ecthy]

There's a lot of use to the core model using protons, electrons and neutrons. Hardly any use for dark energy and all these made up corpuscles. Bosons?

[ZEE]

.

[Jon Miller]

While there are a lot of particles some of us would like to find, we haven't really found a new one for a while (I think the Top quark was the last). That was expected as well.

Currently, we expect to find the Higgs at CERN. In fact, if we don't, our understanding of fundamental physics will be shaken (or at least, my understanding would be).

Jon Miller

[Ecthy]

CERN? Can't you guys run any places on your own?

[KrazyHorse]

Originally posted by Ecthy
There's a lot of use to the core model using protons, electrons and neutrons. Hardly any use for dark energy and all these made up corpuscles. Bosons?

Hardly any use? I suppose not, except that your "core model" is demonstrably wrong.

And as for bosons, it's sort of hard to do without photons.

[KrazyHorse]

Originally posted by Jon Miller
While there are a lot of particles some of us would like to find, we haven't really found a new one for a while (I think the Top quark was the last)

In terms of fundamental particles, that's true, however at least a couple of novel bound states have been discovered since.

[Ecthy]

For more serious:

Has the amount of energy in the entire universe been constant since the big bang? With all the distance between groups, clusters and galaxies, is it reasonable to assume that fluctuation of total energy amount is limited "locally" as well?

What exactly makes the postulate of dark energy necessary? If it isn't necessary, what makes it helpful?

[Kuciwalker]

Conservation of energy died a century ago (or near enough).

[BeBMan]

Geordi