Analogous to matter, but with charge of the particles opposite to their ordinary matter counterparts.

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78 views

Is there a natural source of Antimatter in this universe?

I was just asking if there is an natural source of Antimatter in this universe capable of creating simple molecules/compounds? So, any good answers?
0
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0answers
16 views

Black hole starship: Would micro black-hole Hawking radiation emit anti-matter?

My understanding of Hawking radiation is that virtual particle pairs of matter and anti-matter are created from vacuum energy and one of those virtual particles may escape while the other enters the ...
1
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0answers
26 views

Accelerating antielectrons [closed]

I just signed up to the site. I am not a physicist, but I find physics fascinating. My understanding and knowledge is very little. I was doing some reading on Alpha collaboration < ...
0
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2answers
46 views

Can Acoustic levitation be used to contain antimatter?

Can Acoustic levitation be used to contain antimatter? To me, It sounds like an obvious use of the phenomenon, but I didn't find any documentation about anyone trying this on the web, which could ...
8
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3answers
226 views

What exactly “triggers” a matter/antimatter detonation?

I know that when matter touches antimatter, they both explode and turn into energy. However, by my understanding, atoms don't really touch; their nuclei don't physically contact each other, since ...
3
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1answer
86 views

Why don't antiparticles have antispin?

Antiparticles are often said to particles moving backwards in time. However if they are moving backwards in time shouldn't they also "spin backwards", meaning they should have negative or antispin? ...
4
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1answer
42 views

Electron-Positron Annihilation in a Gravitational Field

When an electron and positron annihilate what happens to any gravitational energy they have? In a way the energy is 'shared' between these two particles and all the matter in space. It must take a ...
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1answer
36 views

How often does photons morph into matter and antimatter?

We know that matter-antimatter collisions are reducing the two into pure energy or photons. Similarly the reverse is possible where a photon can spontaneously morph into two equal particles of matter ...
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1answer
17 views

Is Light Amplification Synchronise Electron/Positron Radiation possible?

Light Amplification Stimulated by Emission of Radiation vs Light Amplification by Sychronised Electron/Positron Radiation By applying a "custom" undulator(a series of powerful magnets) to break up ...
0
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1answer
30 views

Under what conditions can a positron exist in everyday conditions?

I am still learning basic quantum field theory and I am curious in what circumstances could a positron exist as a stable particle like an electron or proton, say for example in a human body or a ...
3
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2answers
80 views

Questions regarding the Feynman-Stueckelberg interpretaion

I am studying for an introductory particle physics exam, and I am having some problems with the Feynman-Stueckelberg interpretation of antiparticle states. Background: The course was being thaught ...
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1answer
86 views

How to distinguish between dark matter and dark antimatter?

I know dark matter exists to account for the missing mass otherwise many galaxies should have already fall apart, unfortunately they seldom interact with other matter and perhaps even their own kind ...
2
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1answer
74 views

Matter and Antimatter [closed]

I'm a noob when it comes to physics and most of my knowledge of physics comes from popular science; it's more likely that I'm wrong than not about this. From what I've understood; Matter and ...
4
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2answers
524 views

Hydrogen vs Antihelium (or vice versa)

I think it's fairly common knowledge that matter and antimatter annihilate each other on contact. But what happens if two dissimilar atoms collide? For example, what happens if a Hydrogen atom (1 ...
0
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0answers
23 views

How is conservation of momentum preserved in antimatter annihilation? [duplicate]

If an anti-proton collides with a proton, they are supposed to totally annihilate each other, correct? Then how is conservation of momentum preserved? Could you launch both protons and antiprotons ...
0
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1answer
73 views

Do different creation/annihilation operators always commute?

In a complex (non-hermitian) scalar QFT, is it correct that the creation/annihilation operators $a,a^\dagger$ (particle) and $b,b^\dagger$ (anti-particle) commute, i.e. $[a,b] = [a,b^\dagger] = ...
4
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2answers
207 views

Are antimatter particles made of ---?

Consider some particle P, and the antiparticle aP. Is it the case that: aP is made of the "usual" elementary particles, and indeed the same elementary particles as P, but arranged (or something) in ...
0
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2answers
85 views

Particle anti-particle annihilation and photon production

This is just a conceptual question I guess. The annihilation of a particle with a finite mass and its anti-particle cannot lead to the emission of only one photon, and this is due to the conservation ...
0
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2answers
33 views

Pair annihilation - can annihilation be moderated?

I recently asked this question: How close does a particle-antiparticle pair need to be for annihilation to happen? And that received a good answer. But there was a second part to my question that ...
0
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1answer
50 views

Are Neutrons and anti-Neutrons attracted to each other over distance?

Lets create a scenario where you have a total vacuum and you're shooting into this vacuum two streams, one, a Neutron stream and the other an anti-Neutron stream and because you're curious what will ...
29
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1answer
1k views

How close does a particle-antiparticle pair need to be for annihilation to happen?

I've most often seen the statement that the annihilation of a particle and its antiparticle occurs when they 'collide' with one another. So in other words when they get very close to one another ...
0
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2answers
60 views

Is antimatter attracted to matter by its opposite electric charge?

As it is said by many physicists that antimatter is just opposite of matter; it has opposite charge of matter, then is there is any possibility that antimatter is attracted to matter? For example - ...
0
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1answer
55 views

Naming anti-electrons and anti-protons [closed]

I think I understand why an anti-electron is called a positron (since it symbolizes positive charge) But why then is anti-proton called an anti-proton and not a negatron?
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3answers
164 views

How many electrons are there – quantum-wise?

If you consider that a particle exists as a quantum field, could you say that all the particles' fields combine into one field for that particle type? Why could you then not say there is no specific ...
1
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1answer
55 views

How was there an extra particle in the early universe?

According to theories.. In the early universe.. There were particles and anti-particles in equal number.. But there seems to be one extra particle against the number of anti-particles.. As the ...
2
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1answer
107 views

How do matter and antimatter interact gravitationally?

Me and my brother were watching television tonight, and he asked me a question that was somewhat along the lines of this: What would happen if the Earth was made of matter, and the moon was made ...
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0answers
35 views

How does positronium work?

I've heard that in positronium, electrons and positrons orbit each other before annihilating one another shortly after. However, I thought that electrons never orbit anything, but instead have a ...
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3answers
181 views

What happens to a particle and antiparticle that collide?

Matter can never be destroyed, so what happens to those particles? Do they just disappear? Where does the mass go?
32
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3answers
6k views

What happens when anti-matter falls into a black hole?

Let's say a black hole of mass $M$ and a very compact lump of anti-matter (not a singularity) also of mass $M$ are traveling toward each other. What does an outside observer see when they meet? Will ...
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2answers
74 views

What should be the anti-particle for proton? [closed]

In alpha decay (electron emission), the particles emitted along with electron is anti-neutrino. On the other hand, the particles emitted by beta decay (positron emission), is neutrino. Neutrino and ...
0
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1answer
51 views

What would antimatter planets look like?

Let's say – hypothetically – in the vastness of space, we found a planet made entirely out of antimatter and surrounded by barely any matter. If someone were to look at the planet, would they confuse ...
0
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1answer
34 views

Particle-antiparticle behaviour

I am trying to understand several particle-antiparticle concepts and there are questions that are not answered in any literature: Hawking's radiation: what happens if classic particle of ...
-1
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1answer
87 views

What would happen if you split an antimatter nucleus? [duplicate]

If we had the huge money required to make it, could it be used as a weapon more destructive than a regular nuclear bomb? Here it would undergo fission AND annihilate regular particles, so...?
9
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1answer
1k views

How is it possible to store antimatter?

Antimatter is simply the opposite of regular matter and will destroy itself and any regular matter it contacts in a flash of raw energy, emitting radiation. Now somehow, scientists have been able to ...
2
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1answer
67 views

Do antiparticles exhibit different chemical properties?

In my physics class today. My teacher mentioned anti-helium and since I had never heard of anti-atoms (if you get what I mean by that) just antiparticles, this made me think: If we could produce ...
5
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2answers
754 views

Each elementary particle has its own field. What about antiparticles?

I understand how particles correspond to their respective fields. What about antiparticles though? Do they have separate fields as well?
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2answers
66 views

How would Boltzmann Brain function with all anti-matter in it? [closed]

Please cope with me, I have been thinking about Boltzmann Brain yesterday and if Quantum fluctuations always happen in pairs of particle and antiparticle since sum of all energy has to be 0. My brain ...
1
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2answers
104 views

Why do we assume that particles and their antiparticles have the same half-life?

Has it been proven experimentally? What would the consequences be if their half-lives were different?
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4answers
140 views

Can a positron decay without encountering an electron?

All the decays I read about involve electron - positron annihilation.
0
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3answers
74 views

Are there an even number of particles in the universe

I generally understand that every particle has an anti-particle that is created along with that type of particle with opposite effects (unless there is no charge), and that if that anti-particle comes ...
0
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0answers
15 views

Any relationship between semi-conductor holes and the Dirac Hole Theory

Isn't the idea of a hole in semi-conductors synonymous to that of anti-matter? I.e. the Dirac Hole Theory and Dirac Sea? I'm aware the Dirac Sea is a theoretical model. But the concepts are almost ...
0
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2answers
39 views

Is it possible that electron and protons are created after a collision of matter and antimatter?

In a recent show in our country it was depicted that after collision of matter and antimatter electron and protons are created .It's a burning topic in our area now , and I couldn't find satisfiable ...
0
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1answer
74 views

What really happens when matter and antimatter combine? [duplicate]

When Energy is converted to matter, we know equal amounts of matter and antimatter are produced. What happens when matter and antimatter combine?
0
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2answers
98 views

Can matter be formed from nothing? [closed]

Well, I wanted to know whether matter can be created from nothing? Could matter be created in pure vacuum or does it require some energy? If energy is required, How is energy converted to matter? If ...
1
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2answers
149 views

Is there a possibility of anti-dark matter?

Based on Galactic Gamma Ray Emission My question is simply put. Although dark matter itself is almost a complete mystery, has anything been published which postulates the existence of anti-dark ...
0
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1answer
53 views

Can/will antimatter ever be superior to fusion as a practical electricity source?

I was reading the top answer on this page and I didn't quite understand if the author (presuming the answer is correct) meant a) that fusion was always better, or b) that once we figure out fusion we ...
0
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3answers
253 views

Do matter and antimatter annihilate or release energy?

Do matter and antimatter eliminate each other or release their equivalent energies? I'm almost certain it's the latter as mass can't be destroyed, but when speaking of the big bang it's said if there ...
1
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4answers
217 views

How is relativity related to anti-particles? [duplicate]

I have heard that a positron is like an electron moving backward through time. Can someone elucidate this statement for me. I would like to hear a deeper explanation of what we believe anti-matter to ...
0
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1answer
64 views

Can we extract positrons from gamma rays?

If gamma rays undergo pair production is there a way to say, deflect and collect the positrons using magnetic fields?
0
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2answers
66 views

Theoretical relativity of black hole and antimatter [closed]

(Theoretically), can black holes be considered antimatter that just cancels its equivalent mass and goes back to neutral stage? Note: Be kind I am not a physicist .