Difference between revisions of "Dark Matter"
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| + | ==Full Title== | ||
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Dark matter is a mysterious substance that makes up most of the matter in the universe, but does not interact with light or other electromagnetic radiation. Scientists have inferred its existence from its gravitational effects on visible matter, such as stars and galaxies.<ref>Britanica ''Dark Matter'' https://www.britannica.com/science/dark-matter</ref> | Dark matter is a mysterious substance that makes up most of the matter in the universe, but does not interact with light or other electromagnetic radiation. Scientists have inferred its existence from its gravitational effects on visible matter, such as stars and galaxies.<ref>Britanica ''Dark Matter'' https://www.britannica.com/science/dark-matter</ref> | ||
| − | + | ==What the Scientists Say== | |
There are different theories about what dark matter is made of, but none of them have been confirmed by direct observation. Some possible candidates are: | There are different theories about what dark matter is made of, but none of them have been confirmed by direct observation. Some possible candidates are: | ||
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* Primordial black holes: These are black holes that formed in the early universe, before stars and galaxies. They could have a wide range of masses and sizes, depending on the conditions of their formation<ref name=nasa /> | * Primordial black holes: These are black holes that formed in the early universe, before stars and galaxies. They could have a wide range of masses and sizes, depending on the conditions of their formation<ref name=nasa /> | ||
| − | Scientists are trying to detect dark matter particles directly using various experiments, such as underground detectors, space telescopes, and particle colliders. However, so far none of these experiments have found conclusive evidence for dark | + | Scientists are trying to detect dark matter particles directly using various experiments, such as underground detectors, space telescopes, and particle colliders. However, so far none of these experiments have found conclusive evidence for dark matter<ref>ESA ''What is Dark Matter'' https://sci.esa.int/web/euclid/-/what-is-dark-matter- </ref> |
Dark matter is one of the biggest mysteries in modern physics and cosmology. It has profound implications for our understanding of the origin, structure, and fate of the universe. | Dark matter is one of the biggest mysteries in modern physics and cosmology. It has profound implications for our understanding of the origin, structure, and fate of the universe. | ||
| + | |||
| + | ==But What About== | ||
| + | The formula in General Relativity is just wrong. After all, its only be tested on nearby objects (the size of the solar system) where we understand how time works. | ||
| + | ==Fun== | ||
| + | This is just for sharing a previous translated chat, no action required. HOW YOUR FINGERS COULD GO THROUGH A TABLE | ||
| + | ===Can the electrons in my finger exchange with the electrons in the table I’m pressing?=== | ||
| + | In ordinary conditions: no. Even though electrons are identical quantum particles, the reason they do not “exchange” in any noticeable way is: * The Pauli exclusion principle prevents electrons from occupying the same quantum state. * The electromagnetic repulsion between atoms creates a large effective barrier. * What we feel as “solid contact” is actually electron cloud repulsion. At a deeper quantum level: * All electrons are excitations of the same underlying electron field. * But exchanging electrons between objects would require overlapping quantum states and tunneling probabilities that are astronomically small. So practically speaking: it does not happen. | ||
| + | ===In what theoretical situation could the atoms of my finger pass through the table?=== | ||
| + | This would require overcoming the electromagnetic repulsion barrier between atoms. The only known mechanism is **quantum tunneling**. However: * For a single electron, tunneling through a small barrier is possible. * For an entire atom, the probability becomes extremely tiny. * For a macroscopic object like a finger (≈10²⁷ atoms), the probability is effectively zero. The tunneling probability decreases exponentially with: * Barrier height * Barrier width * Mass of the particle For macroscopic objects, the probability is so small it is practically impossible. | ||
| + | ===What could increase tunneling probability? High electrostatics?=== | ||
| + | Increasing electric fields generally increases the barrier, not reduces it. To increase tunneling probability you would need: * Lower barrier height * Narrower barrier * Smaller mass High electrostatics would typically increase repulsion. To make macroscopic tunneling plausible would require: * Extreme quantum coherence * Or altering fundamental constants * Or new physics | ||
| + | ===What if all my atoms vibrated at a different frequency than the table’s?=== | ||
| + | In classical terms, frequency mismatch does not remove electromagnetic interaction. Atoms interact because of charge and quantum fields, not because of synchronized vibration. Even if vibrational frequencies differed: * Coulomb forces still apply. * Electron clouds still repel. So frequency mismatch does not allow interpenetration. | ||
| + | ===What about matter waves (de Broglie frequencies)?=== | ||
| + | All particles have a de Broglie wavelength: [ \lambda = \frac{h}{p} ] But for macroscopic objects: * Momentum is enormous. * Wavelength is absurdly small. * Wave-like behavior is unobservable. Different de Broglie frequencies do not eliminate interaction. | ||
| + | ===What about string theory — different vibrational frequencies?=== | ||
| + | In string theory: * Particles are vibrational modes of strings. * Different modes correspond to different masses and charges. However: Interaction is not determined solely by vibrational frequency. It is determined by: * Gauge charges * Allowed couplings in the theory Even if two particles vibrate differently, if they share gauge charges, they interact. | ||
| + | ===Why doesn’t dark matter interact with normal matter?=== | ||
| + | Because it does not carry Standard Model gauge charges. Normal matter interacts through: * Electromagnetism (U(1)) * Weak force (SU(2)) * Strong force (SU(3)) Dark matter, in most models: * Has no charge under these groups. * Therefore cannot couple to photons, gluons, or W/Z bosons. * It may only interact gravitationally. Interaction requires coupling in the Lagrangian — not proximity. | ||
| + | ===Invent a dark-matter-like version of my finger that overlaps but doesn’t interact.=== | ||
| + | To construct this theoretically: * Introduce a second gauge sector. * Introduce a second U(1) gauge field (dark electromagnetism). * Introduce dark electrons and dark protons charged under dark U(1). * Form dark atoms. * Form dark chemistry. * Form dark macroscopic structures. These objects: * Would overlap spatially with normal matter. * But would not exchange photons. * Would not experience electromagnetic repulsion. * Would pass through normal matter. Only gravity would couple them. | ||
| + | ===What is the most important fundamental difference?=== | ||
| + | The most fundamental difference is: > Gauge charge structure. Normal particles: * Charged under Standard Model gauge groups. Dark particles: * Charged under a different gauge group. * Neutral under Standard Model gauge groups. Because of this: * No electromagnetic interaction. * No atomic repulsion. * No overlap resistance. | ||
| + | === What is a gauge charge structure? Gauge charge structure is: > The set of symmetry groups under which particles carry charge and interact. For example: * U(1) → electromagnetism * SU(2) → weak interaction * SU(3) → strong interaction Particles interact if they share gauge charges. | ||
| + | ===What is brane tension?=== | ||
| + | In string theory: A brane is an extended object. Its tension is: > Energy per unit volume (or area). It represents intrinsic stored energy due to its existence as an extended object. It does not require vibration. It is analogous to energy stored in a stretched string. | ||
| + | === What are extra dimensions? In string theory: Spacetime may have 10 or 11 dimensions. We observe 3 spatial dimensions. The others are compactified (curled up). Two branes can: * Overlap in our visible 3D * Be separated in an extra dimension Thus appear coincident but remain independent. | ||
| + | ===Does energy require vibration?=== | ||
| + | No. Energy can be: * Rest mass energy (mc²) * Static field energy * Vacuum energy * Topological energy * Tension energy Vibration is only one form of energy. | ||
| + | ===Can an electron exist at rest?=== | ||
| + | Yes. Relativistic rest means: * Momentum average = 0 Quantum mechanically: * Fluctuations always exist. * Exact stillness is impossible. * But the particle absolutely exists. It has rest energy: [ E_0 = mc^2 ] | ||
| + | ===If it has quantum fluctuations, does it have a natural frequency?=== | ||
| + | Yes. For stationary states: [ \psi(t) \sim e^{-iEt/\hbar} ] This implies a natural quantum frequency: [ \omega = \frac{E}{\hbar} ] So even with zero average motion, the quantum state evolves in phase. This is not classical vibration — it is phase evolution. | ||
| + | === Would a dark electron vibrate differently?=== | ||
| + | In string theory terms: A normal electron: * Open string attached to Standard Model brane. * Specific vibrational mode. A dark electron: * Open string attached to dark brane. * Different vibrational mode. * Different rest mass. * Different natural quantum frequency. * Charged under dark U(1), not our U(1). Thus: [ \omega_{\text{dark}} = \frac{E_{\text{dark}}}{\hbar} ] Different energy → different intrinsic frequency. But the deeper difference is gauge structure. | ||
| + | |||
| + | The reason matter does not overlap is: * Shared gauge structure * Electromagnetic repulsion * Pauli exclusion * Quantum interactions The only way to allow overlap without interaction is: > Different gauge sector + no coupling terms. Not frequency mismatch. Not classical vibration differences. Not de Broglie wavelength differences. The true separator is symmetry structure and charge. | ||
| + | |||
| + | If you want, we can now go one level deeper: Is reality fundamentally vibration? Or fundamentally quantum fields? Or fundamentally symmetry? | ||
==References== | ==References== | ||
[[Category: Physics]] | [[Category: Physics]] | ||
Latest revision as of 17:11, 2 March 2026
Contents
- 1 Full Title
- 2 What the Scientists Say
- 3 But What About
- 4 Fun
- 4.1 Can the electrons in my finger exchange with the electrons in the table I’m pressing?
- 4.2 In what theoretical situation could the atoms of my finger pass through the table?
- 4.3 What could increase tunneling probability? High electrostatics?
- 4.4 What if all my atoms vibrated at a different frequency than the table’s?
- 4.5 What about matter waves (de Broglie frequencies)?
- 4.6 What about string theory — different vibrational frequencies?
- 4.7 Why doesn’t dark matter interact with normal matter?
- 4.8 Invent a dark-matter-like version of my finger that overlaps but doesn’t interact.
- 4.9 What is the most important fundamental difference?
- 4.10 What is brane tension?
- 4.11 Does energy require vibration?
- 4.12 Can an electron exist at rest?
- 4.13 If it has quantum fluctuations, does it have a natural frequency?
- 4.14 Would a dark electron vibrate differently?
- 5 References
Full Title
Dark matter is a mysterious substance that makes up most of the matter in the universe, but does not interact with light or other electromagnetic radiation. Scientists have inferred its existence from its gravitational effects on visible matter, such as stars and galaxies.[1]
What the Scientists Say
There are different theories about what dark matter is made of, but none of them have been confirmed by direct observation. Some possible candidates are:
- Weakly interacting massive particles (WIMPs): These are hypothetical particles that only interact through gravity and the weak nuclear force. They are predicted by some extensions of the standard model of particle physics, such as supersymmetry
- Axions: These are hypothetical particles that are very light and very weakly interacting. They were proposed to solve a problem in quantum chromodynamics, the theory of the strong nuclear force[2]
- Primordial black holes: These are black holes that formed in the early universe, before stars and galaxies. They could have a wide range of masses and sizes, depending on the conditions of their formation[2]
Scientists are trying to detect dark matter particles directly using various experiments, such as underground detectors, space telescopes, and particle colliders. However, so far none of these experiments have found conclusive evidence for dark matter[3]
Dark matter is one of the biggest mysteries in modern physics and cosmology. It has profound implications for our understanding of the origin, structure, and fate of the universe.
But What About
The formula in General Relativity is just wrong. After all, its only be tested on nearby objects (the size of the solar system) where we understand how time works.
Fun
This is just for sharing a previous translated chat, no action required. HOW YOUR FINGERS COULD GO THROUGH A TABLE
Can the electrons in my finger exchange with the electrons in the table I’m pressing?
In ordinary conditions: no. Even though electrons are identical quantum particles, the reason they do not “exchange” in any noticeable way is: * The Pauli exclusion principle prevents electrons from occupying the same quantum state. * The electromagnetic repulsion between atoms creates a large effective barrier. * What we feel as “solid contact” is actually electron cloud repulsion. At a deeper quantum level: * All electrons are excitations of the same underlying electron field. * But exchanging electrons between objects would require overlapping quantum states and tunneling probabilities that are astronomically small. So practically speaking: it does not happen.
In what theoretical situation could the atoms of my finger pass through the table?
This would require overcoming the electromagnetic repulsion barrier between atoms. The only known mechanism is **quantum tunneling**. However: * For a single electron, tunneling through a small barrier is possible. * For an entire atom, the probability becomes extremely tiny. * For a macroscopic object like a finger (≈10²⁷ atoms), the probability is effectively zero. The tunneling probability decreases exponentially with: * Barrier height * Barrier width * Mass of the particle For macroscopic objects, the probability is so small it is practically impossible.
What could increase tunneling probability? High electrostatics?
Increasing electric fields generally increases the barrier, not reduces it. To increase tunneling probability you would need: * Lower barrier height * Narrower barrier * Smaller mass High electrostatics would typically increase repulsion. To make macroscopic tunneling plausible would require: * Extreme quantum coherence * Or altering fundamental constants * Or new physics
What if all my atoms vibrated at a different frequency than the table’s?
In classical terms, frequency mismatch does not remove electromagnetic interaction. Atoms interact because of charge and quantum fields, not because of synchronized vibration. Even if vibrational frequencies differed: * Coulomb forces still apply. * Electron clouds still repel. So frequency mismatch does not allow interpenetration.
What about matter waves (de Broglie frequencies)?
All particles have a de Broglie wavelength: [ \lambda = \frac{h}{p} ] But for macroscopic objects: * Momentum is enormous. * Wavelength is absurdly small. * Wave-like behavior is unobservable. Different de Broglie frequencies do not eliminate interaction.
What about string theory — different vibrational frequencies?
In string theory: * Particles are vibrational modes of strings. * Different modes correspond to different masses and charges. However: Interaction is not determined solely by vibrational frequency. It is determined by: * Gauge charges * Allowed couplings in the theory Even if two particles vibrate differently, if they share gauge charges, they interact.
Why doesn’t dark matter interact with normal matter?
Because it does not carry Standard Model gauge charges. Normal matter interacts through: * Electromagnetism (U(1)) * Weak force (SU(2)) * Strong force (SU(3)) Dark matter, in most models: * Has no charge under these groups. * Therefore cannot couple to photons, gluons, or W/Z bosons. * It may only interact gravitationally. Interaction requires coupling in the Lagrangian — not proximity.
Invent a dark-matter-like version of my finger that overlaps but doesn’t interact.
To construct this theoretically: * Introduce a second gauge sector. * Introduce a second U(1) gauge field (dark electromagnetism). * Introduce dark electrons and dark protons charged under dark U(1). * Form dark atoms. * Form dark chemistry. * Form dark macroscopic structures. These objects: * Would overlap spatially with normal matter. * But would not exchange photons. * Would not experience electromagnetic repulsion. * Would pass through normal matter. Only gravity would couple them.
What is the most important fundamental difference?
The most fundamental difference is: > Gauge charge structure. Normal particles: * Charged under Standard Model gauge groups. Dark particles: * Charged under a different gauge group. * Neutral under Standard Model gauge groups. Because of this: * No electromagnetic interaction. * No atomic repulsion. * No overlap resistance. === What is a gauge charge structure? Gauge charge structure is: > The set of symmetry groups under which particles carry charge and interact. For example: * U(1) → electromagnetism * SU(2) → weak interaction * SU(3) → strong interaction Particles interact if they share gauge charges.
What is brane tension?
In string theory: A brane is an extended object. Its tension is: > Energy per unit volume (or area). It represents intrinsic stored energy due to its existence as an extended object. It does not require vibration. It is analogous to energy stored in a stretched string. === What are extra dimensions? In string theory: Spacetime may have 10 or 11 dimensions. We observe 3 spatial dimensions. The others are compactified (curled up). Two branes can: * Overlap in our visible 3D * Be separated in an extra dimension Thus appear coincident but remain independent.
Does energy require vibration?
No. Energy can be: * Rest mass energy (mc²) * Static field energy * Vacuum energy * Topological energy * Tension energy Vibration is only one form of energy.
Can an electron exist at rest?
Yes. Relativistic rest means: * Momentum average = 0 Quantum mechanically: * Fluctuations always exist. * Exact stillness is impossible. * But the particle absolutely exists. It has rest energy: [ E_0 = mc^2 ]
If it has quantum fluctuations, does it have a natural frequency?
Yes. For stationary states: [ \psi(t) \sim e^{-iEt/\hbar} ] This implies a natural quantum frequency: [ \omega = \frac{E}{\hbar} ] So even with zero average motion, the quantum state evolves in phase. This is not classical vibration — it is phase evolution.
Would a dark electron vibrate differently?
In string theory terms: A normal electron: * Open string attached to Standard Model brane. * Specific vibrational mode. A dark electron: * Open string attached to dark brane. * Different vibrational mode. * Different rest mass. * Different natural quantum frequency. * Charged under dark U(1), not our U(1). Thus: [ \omega_{\text{dark}} = \frac{E_{\text{dark}}}{\hbar} ] Different energy → different intrinsic frequency. But the deeper difference is gauge structure.
The reason matter does not overlap is: * Shared gauge structure * Electromagnetic repulsion * Pauli exclusion * Quantum interactions The only way to allow overlap without interaction is: > Different gauge sector + no coupling terms. Not frequency mismatch. Not classical vibration differences. Not de Broglie wavelength differences. The true separator is symmetry structure and charge.
If you want, we can now go one level deeper: Is reality fundamentally vibration? Or fundamentally quantum fields? Or fundamentally symmetry?
References
- ↑ Britanica Dark Matter https://www.britannica.com/science/dark-matter
- ↑ 2.0 2.1 NASA What is Dark Matter https://www.nasa.gov/audience/forstudents/9-12/features/what-is-dark-matter.html
- ↑ ESA What is Dark Matter https://sci.esa.int/web/euclid/-/what-is-dark-matter-
