- #1
Ilja
- 676
- 83
With http://xxx.lanl.gov/pdf/0705.4298v2.pdf and http://arxiv.org/pdf/1410.2236.pdf I have found some interesting information that there is a lot of empirical evidence to exclude a lot of CDM candidates. All what is necessary is some cross section for interaction with standard matter and the mass.
Indeed, the reasoning is clear, to be the CDM one needs to get the dynamics of the galaxy right one needs a certain density. And, once it interacts not very much with usual matter, one has also a certain estimate for its average velocity - at least the part of it which is necessary to explain the dynamics of the galaxy it is gravitationally catched by the galaxy, thus, has the average velocities of objects gravitationally catched by the galaxy.
Now, I have a question which, I would guess, will be already solved. Assume a simple candidate for dark matter: A complex scalar field (or, more accurate, three of them) which are colored. And have some mass, at least orders of magnitudes greater than quark masses.
I would guess such particles would form, similar to the usual way, some color-free combinations, which would be, also, once they contain at least on of such heavy particles, also sufficiently heavy. But, once they contain some gluons, they would interact with usual matter. There seems not much freedom of choice in this simple model, quite straightforward, with essentially only its mass as the free parameter. So I would guess it has been already considered, with all the parameters, in particular the scattering cross section with nucleons already computed somewhere, with, I would guess, a large range of possible masses already excluded.
Does anybody know where to find the corresponding information about such a trivial model?
Indeed, the reasoning is clear, to be the CDM one needs to get the dynamics of the galaxy right one needs a certain density. And, once it interacts not very much with usual matter, one has also a certain estimate for its average velocity - at least the part of it which is necessary to explain the dynamics of the galaxy it is gravitationally catched by the galaxy, thus, has the average velocities of objects gravitationally catched by the galaxy.
Now, I have a question which, I would guess, will be already solved. Assume a simple candidate for dark matter: A complex scalar field (or, more accurate, three of them) which are colored. And have some mass, at least orders of magnitudes greater than quark masses.
I would guess such particles would form, similar to the usual way, some color-free combinations, which would be, also, once they contain at least on of such heavy particles, also sufficiently heavy. But, once they contain some gluons, they would interact with usual matter. There seems not much freedom of choice in this simple model, quite straightforward, with essentially only its mass as the free parameter. So I would guess it has been already considered, with all the parameters, in particular the scattering cross section with nucleons already computed somewhere, with, I would guess, a large range of possible masses already excluded.
Does anybody know where to find the corresponding information about such a trivial model?