Dark Matter: 6-Quark Particle?

[BWV]

Thoughts? Guessing it’s speculative, but is it a reasonable, testable candidate?

https://scitechdaily.com/sub-atomic-particle-identified-that-could-have-formed-dark-matter/

 

[mfb]

We know the total amount of baryonic matter from big bang nucleosynthesis and the cosmic microwave background. I don't see how such an addition could have stayed undetected. The authors don't discuss this at all, which is a bad sign.

 

[Vanadium 50]

This requires that a particle that is only seen (and not very cleanly at that) in one experiment be real, and also to form a condensate that increases its lifetime by forty orders of magnitude. Furthermore, the authors don't even discuss the impact of this idea on BBN, the most powerful constraint on hadronic candidates.

 

[AndyG]

I don't quite understand how this could be a dark matter candidate as it is made up of charged particles (quarks) thus should interact with light ... which, by definition, makes it matter not dark matter

 

[snorkack]

I don't quite understand how this could be a dark matter candidate as it is made up of charged particles (quarks) thus should interact with light ... which, by definition, makes it matter not dark matter

Neutron has a magnetic dipole moment but no charge. Plenty of nuclei have no dipole moment.
If a nucleus were stable and had no charge, how much cross-section would it have to scatter photons elastically? To scatter other nuclei strongly?

 

[AndyG]

Neutron has no charge but does consist of quarks and does interact with light (and other matter) ...

 

[phyzguy]

We know the total amount of baryonic matter from big bang nucleosynthesis and the cosmic microwave background. I don't see how such an addition could have stayed undetected. The authors don't discuss this at all, which is a bad sign.

I'm not defending the hypothesis, but I think the idea is that these Bose-Einstein condensates of hexaquarks condensed out before big bang nucleosynthesis. Then they would not impact the total amount of baryonic matter we see from BBN or the CMB.

 

[mfb]

I didn't get the impression that they would be bound enough to not matter during BBN.

 

[vanhees71]

But hexaquarks are still strongly interacting guys and thus everything else than "dark", or do I miss something in the argument?