It’s “Loh-na”, not “Lah-na”, and SHUT UP!

All I know is that when matter and antimatter particles annihilate, what that usually means is that they become photons, so that their rest mass - what we usually mean when we say matter itself - is gone, having turned into pure energy, mainly gamma rays I believe.

The other part that you allude to, has to do with how at the quantum level, processes are time-symmetric or time-reversible, look exactly the same if you view their behavior forwards or in reverse, you cannot tell which way it’s going. Antimatter behaves just like matter, but from our perspective like an egg un-breaking, or a car un-crashing, or an ice cube un-melting.

What’s puzzling me is how photons, other bosons like gluons or majorana particles are supposed to be their own anti-particle, how does that affect their time-related behavior and interactions with themselves and other particles, I have no idea… at least not yet.
In fact, I hadn’t even thought about this strange question until just now, and I love it!

MOM!!! cm0002 says we live in Andromeda, is that true?!!

When it’s morning and people are using words and expecting things from me.

What’s the name of that Talking Heads compilation?
Sand In The Vaseline.

Photons can interfere creatively or destructively with each other, but they don’t annihilate on contact, they do not interact with each other that way. I am also pretty sure the same applies for gluons, and I have no idea what the deal is with the two Weak Force bosons, which have mass even though they are bosons!

The Weak Force is a very, very strange, abstract, lovely thing, and if you have a coin with Electromagnetism on one side, the Weak Force on the other side, and flip it with enough energy, that’s when they realized that at higher levels it’s actually the Electroweak Force.

the fire was successfully restored

That is one strange turn of phrase.

Generosity through incompetence… mighty generous of them!

If that is so, if neutrinos really are their own antiparticle, would that theoretically mean that there is no such thing as neutrino annihilation?
Like photons, which are their own antiparticle, and don’t annihilate on contact with each other, but those are bosons with a completely different spin, and also have zero rest mass, unlike neutrinos/antineutrinos, which DO have mass, but seem to somehow draw it out from something other than the Higgs Field.

In the way you describe it, electromagnetic charge is kinda easy to visualize. But when we get into Weak Force interactions, that’s when these other, much more abstract features come into play.

For example, when you say “Spin” you don’t mean regular ol’ Angular Momentum, I’m guessing, but other weird types like Isospin or I-don’t-know-what.

This is all fascinating stuff, truly. And way beyond my pay grade, lol!

On further thought, this is really strange.
I can visualize a negatively charged electron and a positively charged positron making contact and annihilating, how the minus and the plus cancel each other.

But what is it about neutrinos and antineutrinos that make them cancel out when they come into contact? What is it about their positive and negative characteristics that can make them go “poof!” in a burst of photons?

To think that all those individual stars are much, much closer to us, around a few hundred light years at most, while that thing in the background thousands of times more distant, at least two-and-a-half million lightyears behind.

Let’s put it this way:
Let’s say that with your telescope you can see stars that are around 3000 lightyears away. That’s about a kiloparsec, give or take.
Meanwhile, Andromeda is around 780 kiloparsecs behind that.

Here’s fun trick: rotate the glasses 45°, see which movie you get to see, it could go either way!

I’m going to copy-paste the exact relevant bit here:

For each neutrino, there also exists a corresponding antiparticle, called an antineutrino, which also has no electric charge and half-integer spin. They are distinguished from the neutrinos by having opposite signs of lepton number and chirality. As of 2016, no evidence has been found for any other difference.

I knew about the chirality difference, that there are no right-handed neutrinos nor left-handed antineutrinos (or something along those lines, breaking what was thought to be a fundamental parity or symmetry), but what puzzled me was that I thought the charge difference was the one big fundamental difference between matter and antimatter, and suddenly tonight the neutrino question popped into my head. At the very least I knew that it’s not a mass/negative mass type of difference.

Now as for that bit that says “opposite signs of lepton number”… I’d never even heard of this concept or characteristic, until right now.

Is that the Jeroboam Gulp of 7/11 bobas?

“What the hell are you kids doing down there in the basement, that you need these more specific units?”
“Um… nothing, sir. Everything is quite all right, quite all right.”
“Hrumph! Very well then, I shall be in my study. And do try to keep the bloody racket down, for chrissakes!”
“Yes sir, thank you sir, goodnight sir… Whew… that was a close one!”

Brutalist playground!

Go ahead children, develop your spatial abilities in an entertaining manner, for the revolution!

The air’d dared upthere’d

Hong Kong?

In the past week on YouTube, on channels about math and physics, I started getting a constant bombardment of online casino ads. The predatory enshittification is intense anywhere you look.