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

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78 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
59 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
196 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 ...
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1answer
56 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
votes
1answer
132 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
40 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
211 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?
33
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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
86 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 ...
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1answer
58 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 ...
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1answer
40 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
120 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
70 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
765 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
70 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
vote
2answers
112 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
165 views

Can a positron decay without encountering an electron?

All the decays I read about involve electron - positron annihilation.
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3answers
82 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 ...
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0answers
18 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 ...
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2answers
40 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 ...
5
votes
1answer
359 views

Antiparticles, charge conjugation and chirality

(Why/how) are antiparticles and charge-conjugates different things? I am trying to understand the effect of discrete symmetries on spinor fields (neutrinos in particular). In the article, Dirac, ...
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1answer
97 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
117 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
vote
2answers
188 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
66 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
471 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
vote
4answers
260 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
66 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 .
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0answers
45 views

Asymmetry vs. Simple Statistics WRT Matter / Antimatter Ratios

I'm not clear on why physicists suspect, and are looking for, an asymmetry in nature that favors matter over antimatter. Here's a simple thought experiment to illustrate my confusion: Assume I have ...
2
votes
1answer
52 views

C&CP-Symmetry Violation in Baryogenesis

In cosmology, during the big bang; how does C-Symmetry violation allow for a greater number of baryons to be produced than anti-baryons in Baryogenesis, similarly how does CP-Symmetry tie into this?
2
votes
2answers
185 views

Does anti-matter increase or decrease in entropy over time?

Antimatter is matter going backwards through time. From a matter-based observer does antimatter: Increase in entropy (and therefore decrease in entropy in its own time) OR Decrease in entropy ...
0
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2answers
49 views

What would the consequences be if it was experimentally shown that antimatter bends spacetime opposite from matter?

This is inspired by another question I found on here about antimatter bending spacetime the "other way." The answers say that physicists believe antimatter will act the same as regular matter in terms ...
5
votes
2answers
203 views

What is the most common form of antimatter in the universe?

During our high energy accelerator collisions we are bale to produce antimatter. Processes in the Sun produce positrons. Neutron decay produces anti-neutrinos. Cosmic rays can produce a myriad of ...
2
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0answers
103 views

Are we able to store low energy positrons in a magnetic field for arbitrarily long time?

And if not, what prevents us? Is there a mathematical equation describing the loss rate?
2
votes
2answers
342 views

What is the mechanism of particle anti-particle annihilation

My question is loaded with assumptions so to minimize them, I would like to ask it with respect to an electron and anti-electron annihilating. When I think of annihilation, I think of electron and ...
0
votes
1answer
93 views

Difference between anti-matter and matter black holes [duplicate]

Laymen question: Is there any way to determine by observation whether or not a black hole has resulted from the core collapse supernova of a star originally composed of anti-matter versus a star ...
3
votes
2answers
252 views

Could the universe's antimatter be hiding in black holes?

As far as we know almost all the mass in the universe is matter, not antimatter. There are three scenarios: The universe started off with more matter than antimatter and the small amount of ...
0
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1answer
60 views

What is antimatter and its role in the universe?

As we know everything has its opposite. Like matter its opposite is antimatter. So why the universe is not made by antimatter instead of matter. And what is the main role of antimatter in the ...
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0answers
36 views

Can antimatter becomes black hole? [duplicate]

I know it seems unlikely to accumulate sufficient amount of antimatter to let it collapse under its own weight to become a black hole(maybe the gravity works differently I don't know) since they will ...
0
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1answer
92 views

Is a matter anti-matter collision comparable to Gamma Ray Burst (GRB) energy output?

Is a matter anti-matter collision (please assume two cosmological objects, neutron star sized say), the largest energy release method known? Would it be comparable in order of magnitude to gamma ray ...
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1answer
38 views

can we see or accumulate antiparticles

I would like to know if we can see antiparticles with our bare eyes instead of a technological detector. I realize we cant see individual atoms or particles but enough photons grouped together, for ...
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2answers
80 views

Neutron antineutron reaction documentation

Has neutron-antinutron reaction been observed? If so, can you please provide a documentation (experimental observation) for neutron antineutron reaction?
4
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2answers
189 views

Sign of momentum in fermion propagator

Thinking of a process like Compton scattering, where we have an electron as a propagator, I would typically write down the propagator as $$i \frac{\not q+m}{q^2-m^2}.$$ If I were to replace the ...
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votes
1answer
250 views

Similarity between particles and antiparticles

I was doing a past exam paper and there was this question: State the similarities between a particle and its antiparticle. The answer given was: Same mass and rest energy. I am not too bothered ...
2
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1answer
403 views

Is the virtual photon a particle?

I just saw an exam question: Write down the antiparticle for the virtual photon. The answer was "virtual photon". Is the question even a meaningful one? If so please explain why?
2
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3answers
160 views

Does (mass $\rightarrow$ pure energy) conversion need both matter $and$ antimatter?

A question in my revision guide: "Explain why the mass of a tree cannot be converted directly into energy." The answer explains that the tree contains particles but not their corresponding ...
26
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5answers
3k views

Will 1 gram of matter moving at relativistic speeds completely annihilate a larger quantity of stationary antimatter?

This is a question about the relativistic mass concept which I am having trouble understanding, mainly because of the scenario below. Simple scenario: Suppose 1 gram of matter is accelerated to 99% ...
3
votes
3answers
128 views

Decay of matter

I was watching Stephen Hawking's documentary and in there he explained how he realized why black holes eventually disintegrate: There are ripples in space, an antiparticle and a particle get ...