Gravitational force between matter and antimatter

In summary, the current scientific consensus is that the gravitational force between matter and antimatter is predicted to be attractive, based on the theory of General Relativity. However, this has not been experimentally tested yet. Some researchers believe that recent experiments may be getting close to measuring the gravitational properties of antimatter compared to matter.
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Delta2
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What is the current scientific consensus on the gravitational force between matter and antimatter. Is it repulsive, attractive or zero?
 
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Antiparticle of photon is itself and photons attract.
 
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It is a prediction of GR than it is attractive. If it were not (and indeed, not the same as for matter) it violates conservation of energy.
 
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Yes, it is clearly predicted to be attractive, but this has not been experimentally tested yet.
 
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Dale said:
Yes, it is clearly predicted to be attractive, but this has not been experimentally tested yet.
But, we've made antimatter... didn't anybody notice if the stuff tended to fall down, or up ?
 
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hmmm27 said:
But, we've made antimatter... didn't anybody notice if the stuff tended to fall down, or up ?
No. The antimatter that we have made is charged and it is hard to get a region where the EM field is so small that you can see which way it falls under just gravity.
 
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Dale said:
No. The antimatter that we have made is charged and it is hard to get a region where the EM field is so small that you can see which way it falls under just gravity.
Actually, we have made neutral antimatter, but I think that their gravitational properties haven't been studied yet.
 
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If one believes the press releases, various experiments might be getting close to measuring the gravitational properties of antimatter (compared to matter) at good accuracy. Check out the following article:

AEgIs -- Cern Courier Feb 2021
 
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FAQ: Gravitational force between matter and antimatter

What is the relationship between gravitational force and matter/antimatter?

The relationship between gravitational force and matter/antimatter is the same as it is between any other type of matter. Both matter and antimatter have mass, and therefore, they both have a gravitational pull on each other. This means that they will attract each other with a force proportional to their masses and the distance between them.

How is the gravitational force between matter and antimatter different from that between two particles of the same type?

The gravitational force between matter and antimatter is not different from that between two particles of the same type. The force of gravity is a fundamental force that acts between all objects with mass, regardless of their type or composition.

Can matter and antimatter repel each other gravitationally?

No, matter and antimatter cannot repel each other gravitationally. The force of gravity is always attractive, meaning that two objects with mass will always be drawn towards each other.

How does the gravitational force between matter and antimatter affect the stability of the universe?

The gravitational force between matter and antimatter is a fundamental force that plays a crucial role in the stability of the universe. It helps to keep galaxies and other structures together, and without it, the universe would be a chaotic and unstable place.

Is there any evidence of the gravitational force between matter and antimatter in the universe?

There is currently no direct evidence of the gravitational force between matter and antimatter in the universe. However, scientists believe that it must exist, as it is a fundamental force and is necessary for the stability of the universe. Further research and experiments are needed to confirm its existence.

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