![]() We consider two distinct scenarios in which the fluctuations on ΩB are compensated by fluctuations on ΩCDM to assure a spatially flat Ωκ = 0 universe or not.Matter: Stuff. We quantify the goodness of fit using a simple χ 2 test. The resulting C` are qualitatively satisfying. We construct a angular power spectrum in δT/TCMB assuming is can be approximated as an average of C` over a Gaussian distribution of ΩB using Lewis & Challinor’s CAMB software. However, we produce an estimation of the CMB temperature fluctuations that would result from this model and confront it to data acquired from the Planck satellite. Therefore this model essentially escape previous constrainst on symetric matter-antimatter models. Similarly the Compton y distorsion and CMB “ribbons” are lowered by an appreciable factor. As a consequence, the Cosmic Diffuse Gamma Background produced by annihilation is drastically reduced, allowing to easily pass COMPTEL’s measurements limits. At the domains’ annihilation interface, the typical density is going smoothly to zero, rather than following an abrupt step as assumed in previous symetric matter-antimatter models. negative) baryonic density value constitute regions dominated by matter (resp. Spatial domains featuring a positive (resp. A key ingredient in our approach is that the baryon density distribution follows Gaussian fluctuations around a null value η = 0. We consider a non-standard cosmological model in which the universe contains as much matter as antimatter on large scales and presents a local baryon asymmetry. Is a symmetric matter-antimatter universe excluded? Some thoughts on the subject in the following paper. Obviously we had an excess of matter over anti matter, otherwise we would not be here.Īlso its worth thinking about that if we were made of anti matter, instead of normal matter, then we would be calling normal matter, anti matter, and anti matter, normal matter, if you know what I mean. This is not a personal theory by the way, I will be very happy to be told that there cannot possibly be any connection. What relevant research does anyone know of. ![]() I am sure i am not the first to be tempted by that idea. It's tempting to draw the conclusion that the presence of dark matter and the absence of antimatter are related. There was enough of an excess of normal matter so that stars and galaxies could form eventually. ![]() The big bang should have produced equal amounts of matter and antimatter but it didn't The Universe has basically no antimatter, although insignificant quantities can be produced by nuclear reactions. Then there is the puzzle of antimatter, a form of baryonic normal matter with charges reversed. Not saying that antimatter is dark matter (clearly ruled out), but I find it misleading to claim that their abundances cannot have anything to do with each other. Others imply that dark matter carries an effective baryon number and the total baryon number (in the visible and dark sectors combined) is equal to zero. Some of these theories produce an asymmetry in one sector which is then shared with the other sector through effective processes or sphalerons. Many of those models provide a link between the baryon and dark matter asymmetries (and thus abundances). In fact, the similar abundances (factor of five in density) have given popularity to models of asymmetric dark matter, which loosely are theories where an asymmetry between DM and anti-DM and not thermal freezeout is responsible for the dark matter abundance. That they have different properties does not mean there is no connection. I don't see any reason to draw this conclusion. ![]()
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