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RE: Introducing my own research work: about dark top models
Wow,
this is actually the hard core of science, I guess.
For me, it is sometimes hard to imagine all this stuff. For instance, is dark matter the same as antimatter? If dark matter is the consequence of colliding “real” matter, what is the matter to dark matter ratio in the universe? Recently I read that they are planning an even larger LHC. About 10 times bigger than the current LHC! What do you think? Could this project eventually disentangle this mystery?
Which book or publication would you suggest to people who are not so much into this “matter” (haha).
Thanks for the article and have a nice weekend
Regards
Chapper
Many questions in there. Let me try to answer them one by one. Feel free t come back to me on anything that would not be clear.
It is not. At the level of the fundamental particles, an antiparticle (antimatter particle) exists for all particles. For instance, we have electrons (matter) and positrons (antimatter). Quarks (matter) and antiquarks (antimatter). And so on. Both the matter and the antimatter counterparts have been observed.
For dark matter, the question becomes model dependent. There are dark matter models in which the dark matter particle is its own antiparticle (so that dark matter equals dark antimatter) and other models in which we both have dark matter particles and antiparticles.
But in all cases, we cannot really tell they are the same.
The matter to dark matter ratio is well (indirectly) measured: it is of about 5. I however do not understand what do you mean with dark matter being a consequence of colliding matter. Do you mind expanding the question a little bit? Thanks in advance!
The best is to give you this link. This is my opinion (in short: yes I would love to see this machine). I actually even co-authored the official articles where the physics potential of such a machine is discussed :D
Hey lemouth,
Thanks for the detailed reply.
In your article you write:
This implies to me that dark matter could be created solely under high energetic condition (such as at the very beginning of our universe). Or is this just an experimental setting?
Wow, pretty cool and after trying to upvote the article I realized that I got the information from this article just a few months ago.
Haha, Steemstem my new science information source.
Thanks for the explanations and good luck to get this machine funded.
Regards
Chapper
Ok now I see. We need two conditions here.
First, mass is energy. Therefore, we need to accelerate normal matter enough so that dark matter can be produced (we need enough energy to produce a heavy dark matter particle).
Second, dark matter can only be produced from normal matter if it interacts enough with it. This means, the production rate is large enough to be able to produce enough dark matter to detect it. In the model I discuss here, the mediator helps to reach a decent enough rate relstively to the LHC configuration.
Ok, understood. But where or how is dark matter produced in the universe?
The answer to there where part is easy: today, dark matter cannot be produced anymore in the universe because it is too cold. But in the early universe, the universe was much hotter so that highly-energetic normal matter particles could annihilate to produce dark matter. Today, normal particle are not energetic enough to lead to dark matter production.
For the how, it is a model dependent question. If dark matter couples to normal matter in some way, you can use this way to explain both processes: dark matter annihilation into normal matter and the reverse reaction.
Thus dark matter is diluted somehow in the universe causing the deceleration of the expansion?
The expansion of the universe is accelerating and is caused by dark energy. Dark energy and dark matter are two different objects and should not be taken one for another (I assumed you confused the two concepts here).
Obviously I have to learn a lot much more about physics ;-)