What is the Universe expanding into..

[Galu]

This multiverse is just some mis-interpretation of math.

Not quite.

There are many mathematical models based around vacuum decay, the bubble universe being one of them.

Don't ask me what the others are!

 

[Galu]

But you speak as if it's a conclusion you've come to.

I'm getting tired of this!

I have made it clear at every turn that I am talking about current hypotheses.

Perhaps you need a definition: Hypothesis: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

There is no hard evidence!!!!

 

[benb]

Okay, so how did you come to this HYPOTHESIS?

Please don't say drugs, I'm too old to start now.

 

[Disco-Pete]

I'm getting tired of this!

I have made it clear at every turn that I am talking about current hypotheses.

Perhaps you need a definition: Hypothesis: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

There is no hard evidence!!!!

Calm down Galu, I don't mean to take you to task as it were. Give us the "soft" evidence.

 

[gpauk]

Disco Pete ...this is just a lounge in a audio site... If you want answers, there's a lot or real info out there from brilliant physicists... From Feynman to Sabine, not to mention MIT courses free online. I watcheda fascinating webinar on gravity waves by Deanna Hooper yesterday, people at the forefront of research are out there sharing. Go study!

 

[TNT]

What makes you think the other option is not logical? Because it's banned here? ....

No, by logical sens. But, app app app! :-D

//

 

[Galu]

Okay, so how did you come to this HYPOTHESIS?

Where did you get the idea that it was I who came up with this, or any other, hypothesis?

I leave such hypothesising up to mathematical minds which are vastly superior to mine.

I merely report on their musings, which are there for all to see on the interweb, if they care to look.

 

[Disco-Pete]

Disco Pete ...this is just a lounge in a audio site... If you want answers, there's a lot or real info out there from brilliant physicists... From Feynman to Sabine, not to mention MIT courses free online. I watcheda fascinating webinar on gravity waves by Deanna Hooper yesterday, people at the forefront of research are out there sharing. Go study!

Well, yes but full of great insightful minds, some of which whom you speak. This is all great fun regardless of which particular forum we participate in here. In any case, it's obvious there's lots of real info here to contemplate. It's not hard to recognize intellect worthy of deference. Besides, I love a good argument. 🙂

p.s., not a nasty one.

 

[Galu]

Besides, I love a good argument.

I don't see you making many arguments. It's usually just follow-on questions which can carry a whiff of negativity.

Making an effective negative argument requires that you advance a position that contradicts one of your opponent’s premises.

 

[system7]

We should be surprised and honoured that "Head Honcho" Pano has stepped into this thread.

https://arxiv.org/abs/1803.08930

I will study this Theory. Sterile Neutrinos? What's not to like? 🙂

 

[Galu]

The universe/anti-universe pair concept sounds similar to the dipolar universe idea that was mentioned in the thread not too long ago.

Dipolar refers to two equal but opposite universes that are separate from each other.

 

[TNT]

Well, yes but full of great insightful minds, some of which whom you speak. This is all great fun regardless of which particular forum we participate in here. In any case, it's obvious there's lots of real info here to contemplate. It's not hard to recognize intellect worthy of deference. Besides, I love a good argument. 🙂

p.s., not a nasty one.

Still, one need to try to balance once attitude and way to communicate. Its a fine line between being annoying and just ignorant/inquisitive... 😉

//

 

[system7]

I have to admit that I am baffled by the current state of affairs in the Universe.

Standard Model is broken by Quantum Gravity. String Theory makes no testable predictions.

We investigate the idea that the universe before the Big Bang is the CP T reflection of the universe
after the bang, both classically and quantum mechanically, so that the universe does not sponta-
neously violate CP T . We show how CP T symmetry selects a preferred vacuum state for quantum
fields on a CP T -invariant cosmological background spacetime. The universe before the bang and the
universe after the bang may be viewed as a universe/anti-universe pair, emerging directly into the
hot, radiation-dominated era we observe in our past. This, in turn, leads to a remarkably economical
explanation of the cosmological dark matter. With no additional fields beyond Einstein gravity and
the standard model of particle physics (including right-handed neutrinos), a Z 2 symmetry stabilizes
one of the right-handed neutrinos. We calculate its abundance in detail and show that, in order
to match the observed dark matter density, its mass must be 4.8 × 10 8 GeV. We obtain several
further predictions, including: (i) that the three light neutrinos are majorana; (ii) that one of these
is exactly massless; and (iii) that, in the absence of an epoch of cosmic inflation, there should be no
primordial, long-wavelength gravitational waves. We also briefly discuss the natural origin of the
matter-antimatter asymmetry within this picture and possibilities for explaining the cosmological
perturbations.

https://arxiv.org/abs/1803.08930

I am working on it.

 

[Galu]

I am working on it.

A good place to start would be to explain the meaning of "CPT symmetry"! 😵

CPT symmetry applies to all our physical theories, such as General Relativity and Quantum Field Theory, and has never been found to be violated.

The above interpretation of the Big Bang, referred to by Pano, is unlike previous hypotheses in that it does not violate CPT.

CPT symmetry says that any physical system made of particles that moves forwards in time will obey the same laws as the identical physical system made of antiparticles, reflected in a mirror, that moves backwards in time.

For the interested reader:

C is for charge conjunction: every particle can be replaced by its antiparticle counterpart.

P is for parity: every particle, interaction or decay can be replaced by its mirror image counterpart.

T is for time-reversal symmetry: the laws of physics are the same regardless of whether you run the clock forwards or backwards in time.

These symmetries can be violated individually, but not all three at the same time.

Ethan explains further here: https://www.forbes.com/sites/startswithabang/2020/03/25/the-one-symmetry-that-the-universe-forbids-us-from-violating/#:~:text=CPT symmetry says that any physical system made,in a mirror, that moves backwards in time.

 

[Galu]

"We obtain several further predictions, including: (i) that the three light neutrinos are majorana..."

Majorana? I learn a new word every day!

There is an outstanding question about neutrinos - “Are neutrinos and antimatter neutrinos different particles, or the same particle masquerading as two?”

If neutrinos are Dirac particles, their matter and antimatter versions are very different. https://en.wikipedia.org/wiki/Dirac_equation

If they are instead Majorana particles, the matter and antimatter components are the same thing.

Apparently, if neutrinos are Majorana particles, this opens up all sorts of new kinds of physics.

 

[TNT]

It's a name 🙂

//

 

[Galu]

Ettore Majorana (left) and Paul Dirac (right) proposed two different answers to the question of whether neutrinos and antineutrinos are different particles or a single particle masquerading as two.

Learning all the time! 😎

 

[Galu]

It's a name 🙂

Just like Dirac is! As you can see, I was already on it - and provided the full name. 🤓

 

[Galu]

The extract used the term "majorana", which should have been capitalised in the way I wrote it, since it is a person's name.

These boffins really need to get their act together and not make such elementary mistakes! 😱

How are we to believe anything they say if they can't get the basics right?! 😀

 

[system7]

There's two sorts of people, IMO.

Those who are happy to play with their 'phones as they walk down the Street.

And me. I contemplate the deeper Laws of the Universe.

So far, so good.

How hard can it be?