PeterDonis's latest activity

Moderator's note: I have moved this thread to Other Physics Topics because it is not a General Discussion thread; it is a physics...

@Amazed I am closing this thread because it is not going anywhere. The questions you are asking are not answerable, because, as I've...

There is no one single definition of "particle" in physics. The paper @bhobba linked to talks about one popular meaning that can be...

There isn't one. That isn't a concept that plays any role in our actual physical theories. There is? What kind of disagreement...

You're still way too vague. Does your list of "things" include, e.g.: energy, entropy, the color red, music, love, thoughts and prayers...

There isn't one single agreed upon word that means that. You would do much better to stop quibbling over definitions of words and ask...

Found it: https://www.physicsforums.com/threads/how-can-a-principle-produce-a-force.1052769/post-6918504 The paper is by Dyson &...

The 18 quantum fields already encompass anti-particles where appropriate. For example, the 4 complex components of the Dirac electron...

Because they're using different definitions of ordinary language words. That's why we don't do physics using ordinary language. We do it...

@Borek threw you a curve ball, yes. But it's not as bad as you think: For fundamental bosons, i.e., bosons with no internal structure...

Who specifically claims that, and where did they claim it? Usually if you look in context then you can see why someone said something.

No, because we don't just have one "still photo" of observations. We observe things happening over the course of time. So time is part...

We don't "impose" a metric. We figure out what it is by looking at "the universe's natural activity" and the causal structure it...

How is this different from a Lorentzian metric?

Yes, but then these aren't proper clocks that measure the actual local passage of time. If the astronauts on the perimeter brush their...