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Would it be possible then that matter attracts matter, antimatter repulses antimatter
According to Gerard 't Hooft, every physicist recognizes immediately what is wrong with the idea of gravitational repulsion: if we throw a ball high up in the air so that it falls back, then its motion is symmetric under time-reversal; and therefore, the ball falls also down in opposite time-direction. Since a matter particle in opposite time-direction is an antiparticle, this proves according to 't Hooft that antimatter falls down on earth just like "normal" matter. However, Cabbolet replied that 't Hooft's argument is false, and only proves that an anti-ball falls down on an anti-earth - which is not disputed
Hello everyone, they are currently different experiments in the CERN to see how antimatter behave with the gravitational field of our Earth, i was thinking, what if they do not find any gravitational interaction between matter and antimatter?
Would it be possible then that matter attracts matter, antimatter repulses antimatter, with no gravitational interaction between them.
14C → 14N + β
In beta decay, an atom will give off a positron, which had been existing, stably, inside the nucleus.
Pmbphy, if i understand we assume that inertial mass is the same thing than gravitational mass, so antimatter should fall the same, right?
I am sorry i do not understand the second part, what is arbitrary?
There are many confusions about antiparticles. You cannot look at an object and say whether it is a particle or an anti-particle; you can only say X is an anti-particle of Y, and so Y is an anti-particle of X. You canít say Y is the particle and X is the anti-particle, or vice versa.
Thank you for your link Pmbphy,
If i got what is written, whatever happens the total of energy is conserved, then everything is possible, ...
But still, i am sorry i do not understand what is arbitrary, ...
we live in a world mostly full of matter, if an antimatter asteroid collides with us it will definitly hurt more than the same one matter made.
In the end, let us consider a ball on the ground of the earth, the two things are mostly matter made, and attracting each other towards the future, in some way they can be seen as anti matter objects attracting each other towards the past. See what i mean?
If litterally an antiparticle of a particle is the same one going backwards in time, ...