tag:blogger.com,1999:blog-2846514233477399562.post8710531152308919134..comments2024-01-08T09:37:04.406+01:00Comments on RÉSONAANCES: Dark Matter more like BaryonsJesterhttp://www.blogger.com/profile/08947218566941608850noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-2846514233477399562.post-45982307037896336722009-05-07T05:45:00.000+01:002009-05-07T05:45:00.000+01:00Not based on a model, but using correspondences be...Not based on a model, but using correspondences between the pattern of elements of the standard model and special unitary and pseudounitary subalgebras of sl(4,C), I've arrived at a prediction that dark matter is composed of an equivalent of the hydrogen atom made up of 4 quark like particles (~leptons + quarks with the symmetry breakage between them removed), which I've set out in a paper "The pattern of Reality" published in "Advances in Applied Clifford Algebras" volume 18,(1).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-2962703694198608062009-04-22T07:40:00.000+01:002009-04-22T07:40:00.000+01:00There was a paper by Strumia recently who said tha...There was a paper by Strumia recently who said that Kaplan's idea can also be realized with a few TeV DM particle...Slavanoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-84227280799141314052009-04-08T17:52:00.000+01:002009-04-08T17:52:00.000+01:00@ChuckSince the standard model as it stands can't ...@Chuck<BR/><BR/>Since the standard model as it stands can't explain baryogenesis successfully, every model that tries to explain it has to make certain assumptions about some type of physics beyond the SM. This ranges from supersymmetry over heavy righthanded neutrinos to whatever exotic theory you could imagine. <BR/><BR/>Since in most models baryogenesis takes place at temperatures below the GUT scale it is actually quite robust against variations of a underlying GUT theory. <BR/><BR/>One could say that some popular models of baryogenesis can be embedded into a GUT theory but their success does not depend on the actual presence of that GUT. <BR/><BR/>In the end, who knows...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-81035823794520797252009-04-08T00:07:00.000+01:002009-04-08T00:07:00.000+01:00I think these baryogenesis/dark matter models must...I think these baryogenesis/dark matter models must somehow model the early universe. And, I guess, that's done with some kind of SUSY/non-SUSY GUT. So, I wonder how robust are those predictions against variations of the underlying GUT. After all, it might happen that the physics beyond the SM is not a GUT, or a GUT that has not been discovered yet.Chuck U. Farleynoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-36602358943608670732009-04-07T04:07:00.000+01:002009-04-07T04:07:00.000+01:00The energy (or better entropy) of most matter and ...The energy (or better entropy) of most matter and antimatter is still there in the photons. But the energy of relativistic particles like the photons gets quickly red-shifted by the expansion of the universe. Today, photons contribute only some 10^(-4) to the total Omega of the universe.Jesterhttps://www.blogger.com/profile/16844247827820646813noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-27640983124483065942009-04-06T18:08:00.000+01:002009-04-06T18:08:00.000+01:00Just an ignorant question. The baryogenesis model ...Just an ignorant question. The baryogenesis model says that most of the energy in particles originally went into photons because of anti-matter annihilation. When people talk about these omega numbers for the universe, 5% Baryons, 20 some percent dark matter or whatever. (ought to be called transparent matter to me) Where does the energy from all these anti-matter photons get added in? Seems like it should be reflected there somewhere. Is it just thrown in with the regular matter?Markknoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-178748602984980792009-04-02T14:54:00.000+01:002009-04-02T14:54:00.000+01:00Obviously it's model dependent. One experimental p...Obviously it's model dependent. One experimental problem is that this kind of dark matter does not need a sizable annihilation cross-section (unlike WIMPs) which can make it more elusive.Jesterhttps://www.blogger.com/profile/16844247827820646813noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-31613297161847054102009-04-02T13:18:00.000+01:002009-04-02T13:18:00.000+01:00Intriguing. I did not know about the purported co...Intriguing. I did not know about the purported connection between relic densities and baryogenesis (shame on me).<BR/><BR/>Perhaps the next question is: can we obtain clear signals for 5 GeV dark matter particles at the LHC? This is food for thought.Michael Schmitthttp://muon.wordpress.com/noreply@blogger.com