Is Cosmic Matter Composition Complete ?

Click For Summary

Discussion Overview

The discussion revolves around the completeness of cosmic matter composition, focusing on the proportions of ordinary matter, dark matter, and dark energy in the universe. Participants explore questions regarding the nature of dark matter, the potential for forming exotic atoms, and the sources of cosmic rays, while also addressing the implications of these inquiries on current theories in physics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants assert that 5% of the universe's mass consists of protons, neutrons, and electrons, while 25% is attributed to dark matter and 70% to dark energy, questioning the nature of dark matter.
  • Questions are raised about the possibility of forming atoms from strange-charm quarks and muon leptons or top-bottom quarks and tau leptons, with one participant noting that these particles are unstable.
  • There is uncertainty regarding the source of cosmic rays, with some participants suggesting they are mainly protons.
  • One participant proposes that an increase in rest mass may cause instability in particles, while another counters that relativistic mass does not affect particle stability.
  • Discussion includes the observation that muons can have longer lifetimes when traveling at relativistic speeds, but they are not equivalent to electrons.
  • Participants discuss the implications of the universe's expansion on matter density, with a claim that both baryonic and non-baryonic matter density decreases.
  • Concerns are expressed about the applicability of current theories, such as quantum mechanics and general relativity, particularly at extremes of mass and energy.
  • One participant introduces a new invariance of nature involving acceleration and distance, suggesting a relationship with the speed of light.

Areas of Agreement / Disagreement

Participants express a range of views, with no consensus on the nature of dark matter, the stability of certain particles, or the implications of current theories. Disagreements persist regarding the completeness of existing models and their applicability in extreme conditions.

Contextual Notes

Limitations include unresolved questions about the nature of dark matter, the stability of exotic particles, and the effects of cosmic expansion on matter density. The discussion reflects a variety of hypotheses and uncertainties without definitive conclusions.

Antonio Lao
Messages
1,436
Reaction score
1
Is Cosmic Matter Composition Complete ?

Convincing theoretical and observational evidence indicate that 5% of mass of the universe is made up protons, neutrons, and electrons (.05%). 25% of the mass is from dark matter. What is dark matter? Nobody is certain. 70% from dark energy of repulsive cosmological constant of general relativity which is really mass causing the antigravity force.

Quantum mechanics only uses the 1st 5% of the stable mass to account the formation of ordinary atoms as shown by the periodic table of chemical elements.

Why can't atoms of strange-charm quarks and muon leptons or top-bottom quarks and tau leptons be formed? Are these the source of dark matter?

What is the source of cosmic rays? Are they mainly protons?

Failures to answer these questions indicate strongly that our current theories are not complete hence not universally applicable.
 
Physics news on Phys.org
Why can't atoms of strange-charm quarks and muon leptons or top-bottom quarks and tau leptons be formed? Are these the source of dark matter?
All the particles you listed are unstable.

What is the source of cosmic rays? Are they mainly protons?
I am not sure of the answer to the first, but yes they are mostly protons.
 
mathman,

Experiments seem to indicate that increase in mass causes instability. But cosmic rays protons have high relativistic mass and yet they remain stable.

Edits:

Maybe it is the increase in rest-mass which causes instability?
 
Relativistic increase in mass has nothing to do with stability of particles. In their own coordinate system, they don't increase in mass, only to outsiders in relative motion. The unstable particles are different from the stable. Muons are NOT fast moving electrons, etc.
 
Muons lived a lot longer when traveling close to light speed.
 
That is true - it is a relativistic effect. But it doesn't make them electrons. Fast moving electrons (in accelerators) can be quite heavy, but they are not muons.
 
When the universe expands, does the matter density remain the same or decrease?
 
Matter density (both baryonic and non-baryonic) decreases. Dark energy is anybody's guess. Try starting a new thread - you may get some other answers.
 
mathman,

Thanks. The title of the new thread is 'Entropy and Expansion, a Puzzle?
 
  • #10
Antonio Lao said:
Convincing theoretical and observational evidence indicate that 5% of mass of the universe is made up protons, neutrons, and electrons (.05%). 25% of the mass is from dark matter. What is dark matter? Nobody is certain. 70% from dark energy of repulsive cosmological constant of general relativity which is really mass causing the antigravity force.

Quantum mechanics only uses the 1st 5% of the stable mass to account the formation of ordinary atoms as shown by the periodic table of chemical elements.

Why can't atoms of strange-charm quarks and muon leptons or top-bottom quarks and tau leptons be formed? Are these the source of dark matter?

What is the source of cosmic rays? Are they mainly protons?

Failures to answer these questions indicate strongly that our current theories are not complete hence not universally applicable.


What is so convincing about what you discuss re dark matter and dark energy? You do not need the simple failure of answering these questions to see that current theories of QM SRT, GRT are not universally applicable, or even applicable in any partilular instance, ever.
 
  • #11
geistkiesel,

The failures are at the extremities of all theories. The point of zero mass/energy and infinite mass/energy. They very well are applicable in between, specially at the middle. These theories do work: it's the reason we are here to witness them (the anthropic cosmological principle).

The questions that I am attempting to answer are: why gravity is very weak almost zero and why it will take infinite mass/energy for gravity to be very strong as in the center of a black hole? Or at the singularity of the big bang?

Edits:

Furthermore, I am trying to find the justification of a new invariance of nature given as follow:

[tex]\vec{a} \cdot \vec{r} = c^2[/tex]

where [itex]\vec{a}[/itex] is the acceleration and [itex]\vec{r}[/itex] is a distance and [itex]c[/itex] is the speed of light in vacuum. This says that the scalar product of acceleration and a distance is the square of light speed.
 
Last edited:

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 13 ·
Replies
13
Views
8K
  • · Replies 62 ·
3
Replies
62
Views
13K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 20 ·
Replies
20
Views
5K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 11 ·
Replies
11
Views
5K