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2. A similar "gravitational segregation" argument has been used before to try to explain the matter-antimatter asymmetry in the observable universe. (I mention this briefly in my essay here On the Foundational Assumptions of Modern Physics.) ~
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I am glad to see your essay and greatly enjoyed reading your essay
There are two ways on antigravitation.
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Model-1 :
Inertial mass < 0, (Active and Passive) Gravitational mass < 0.
The principle of equivalence is valid. My model is a model-1.
In my article, I show that negative mass(energy) provides an explanation for dark matter and dark energy.
Model-2 :
Inertial mass > 0, (Active and Passive) Gravitational mass < 0.
The principle of equivalence is not valid. Some people have speculated that antimatter itself may have an anti-gravity effect.
Model-2 has a merit. Model-2 can also explain anti-gravitational effect(accelerating expansion). And it explains asymmetry between matter and antimatter.
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In the model-1,
At the Earth, negative mass will fall the Earth.
If negative mass and positive mass were born together at the beginning of universe, positive mass has attractive effect each other, so it forms star and galaxy structure now, but negative mass has repulsive effect each other and nuclear force cannot form nucleons by binding negative mass, so they cannot make massive mass structure like star or galaxy.
The current structure of the galaxy is a structure that survived in the pair-annihilation of positive mass and negative mass and, since negative mass existed outside of this galaxy structure, therefore it has not been observed.
In the model-2
Antimatter will grow away from the Earth.
If matter and antimatter were born together at the beginning of universe, matter has attractive effect each other, so it forms star and galaxy structure now, and antimatter has attractive effect each other, so it forms star and galaxy structure now. And antigravity exist between the galaxy and anti-galaxy.
However, if we considering the random creation, uniformly distribution and dark energy effect, anti-galaxy(or anti-galaxy cluster) must be existed at neighborhood. So, maybe, we must observe it(anti-galaxy or pair annihilation in large scale).
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Do you think it's possible that the negative-mass particles you are proposing might be ordinary antimatter?
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In my opinion, model-1(original negative mass) is pessimistic. Model-2 is affirmative than model-1!
On the asymmetry of matter and antimatter,
[ My conjecture ]
Positive energy(mass) and negative energy(mass) was pair-created in zero energy state. -->
Positive energy creates the matter and antimatter with same amount.-->
Negative energy(mass) prefer to the antimatter than matter. Because that antimatter has a little different physics quantity(it is a secret.^^") -->
Pair annihilation of negative energy and antimatter > Pair annihilation of negative energy and matter -->
Therefore, matter and antimatter have an asymmetry.
Have a nice day!
--- Hyoyoung Choi