Dear Ben Dribus,
I am sorry. I apologize for my poor English. I am not sure that below thought be helpful to you.
We have to open up a lot of possibilities about negative mass(energy).
1. Negative mass hard to form the structure greater than the atom.
As examined the equation of motion for negative mass, it is marked in form of F = -ma(m > 0), when attraction is applied together with nuclear force(when usually nuclear force is attraction, but has the form of repulsive core), and assuming nuclear force has the form of F = -Q(r)^r, Q(r) is the function of distance r, thus nuclear force is in the form of attraction worked in the direction of -^r. Here, for the force worked on negative mass m,
F = -ma = -Q(r) ^r
a = (Q(r)/m) ^r
The term of acceleration is positive, so the effect of increasing distance r, namely repulsive effect appears. This means that negative mass hard to form the structure like atom(massive nucleon, baryon, particle consists of multi elementary particle), because nuclear force has not binding negative mass when it is applied to negative mass. Also, gravity has not binding negative mass(repulsive)
But, we can see that the negative mass can form its binding structure if there is any repulsive interaction among the negative mass, from the characteristics of negative mass.
In addition, negative mass and positive mass can form binding structure and atomic structure in theory.
For example, it can form atomic structure if the positive mass is located in the center, and the negative mass is located in the surrounded area, and both are rotating.
2. Without giving that kind of characteristics of "the observation result that seems to be that dark matter does not emit or absorb photons" from the first, can this kind of result be induced from other basic principle?
The process of negative mass emitting photon
(-E) -hv < -E
-E: Initial energy of negative mass, (E>0)
The relational expression above means that if negative mass emits photon(with positive energy), then the energy after emitting gets lower than the energy before emitting.
Negative mass is stable at the state of high energy(Refer to my essay!), so the voluntary transition that negative mass emits photon and succeeds to the lower energy level does not exist. Therefore, negative mass explains the result of the current observation that dark matter does not emit photon from the fundamental principle.