When was Dark Matter Proposed After the Big Bang?

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Discussion Overview

The discussion revolves around the timing of the proposed existence of dark matter after the Big Bang. Participants explore the nature of dark matter and its hypothesized formation in relation to cosmic events.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant notes that the understanding of dark matter's composition is still uncertain, suggesting that hypotheses exist but no definitive answers are available.
  • Another participant inquires about the most likely epoch after the Big Bang during which dark matter is believed to have formed, expressing a desire for more concrete information.
  • A later reply proposes that Weakly Interacting Massive Particles (WIMPs) are considered to have formed shortly after the Big Bang, specifically during the electroweak freeze out, which is suggested to occur less than one second after the event.
  • Additional alternatives such as Lightest Supersymmetric Particles (LSP) and Axions are mentioned as other possibilities for dark matter candidates.
  • A link to a lecture is provided for further reading on the topic.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the exact nature and timing of dark matter's formation, with multiple competing views and hypotheses presented without consensus.

Contextual Notes

The discussion reflects limitations in current understanding of dark matter, including the dependence on theoretical models and the lack of empirical evidence regarding its composition.

Deepak247
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Hi there...
I believe my previous questions related to a specific topic has caused a stir here with many people complaining/advising me to study that field more properly before asking anything...

So now i will change topic hoping everyone is happy with it...

I want to discuss dark matter now...Ive researched on it and what i need to know is that...


When is this proposed "DARK MATTER" came into being after the big bang?
 
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That would depend on what dark matter is actually made of. At this point, we don't know. We know that the evidence points towards its existence, but as to what it is, we can only hypothesize.

It's kind of like finding your trash can disturbed. The evidence points to some animal getting into it, but you don't know what kind. Is it raccoons? Possums? Cats?
 
yes of course but what is the MOST LIKELY assumption ? at what time or EPOCH after big bang does scientists consider it to be created? They must have some clue...do they?
 
Deepak247 said:
yes of course but what is the MOST LIKELY assumption ? at what time or EPOCH after big bang does scientists consider it to be created? They must have some clue...do they?

The most popular answer would be WIMPs at the time of the electroweak freeze out, much less than one second after the "big bang". Also Google "LSP" and "Axion" for further alternatives.

Jim Graber
 
<http://web.njit.edu/~gary/202/Lecture26.html>
Reading this lecture might be fun for you.
Jim Graber
 
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