Timeline for Baryon asymmetry
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 7 at 0:04 | comment | added | James | e.g. there are initially 100 $p^+$ & 100 $p^-$ on the upper floor of a fraternity house. By coincidence, a $p^-$ finds itself surrounded by 10 $p^+$. The unlucky $p^-$ is kicked (photo-disintegrated) to the lower floor, becoming a $e^-$. (A $p^+$ is surrounded by 10 same-charged $p^+$ has a smaller probability to photo-disintegrate) There are now 100 $p^+$ & 99 $p^-$ on the upper floor. By induction, the ratio will worsen e.g. to 80 $p^+$ & 77 $p^-$. Adding gradual probabilistic pair annihilation over time, there might end up only 3 $ p^+$ left on the upper floor & 3 $e^-$ on the lower floor. | |
| Oct 6 at 14:20 | comment | added | James | Suppose antiprotons has a tendency to disintegrate into electrons $p^- + \gamma \rightarrow e^- + ...$ and positrons has a tendency to disintegrate into protons $e^+ + \gamma \rightarrow p^+ + ...$. Then the universe will be filled will mostly protons and electrons. | |
| Dec 4, 2015 at 19:17 | answer | added | Lewis Miller | timeline score: 1 | |
| Oct 21, 2014 at 13:19 | answer | added | Dieter Heymann | timeline score: -3 | |
| Nov 24, 2012 at 17:00 | history | post merged (destination) | |||
| Apr 21, 2012 at 17:40 | answer | added | Luboš Motl | timeline score: 9 | |
| Apr 20, 2012 at 6:31 | comment | added | anna v | continued: If there were as many galaxies as anti galaxies, collisions would have a probability, and when colliding they would be a great source of distinctive gammas from annihilations. These have also not been detected. Had they been, we would have seen an antigalaxy, except maybe we would not be able to know which of the two colliding ones was the anti. | |
| Apr 20, 2012 at 6:27 | comment | added | anna v | @LeosOndra The way we expect to see from the earth anti galaxies is by the distinctive lines in the gamma spectrum. These annihilations will be by the dust and clouds of antimatter surrounding such a galaxy, at the interface with the space surrounding a galaxy. The intergalactic region will be rife with annihilations of the dust and the particle clouds, which will have characteristic lines in the spectrum. These have not been detected. | |
| Apr 20, 2012 at 5:56 | answer | added | John Rennie | timeline score: 2 | |
| Apr 19, 2012 at 21:43 | comment | added | Leos Ondra | Just a side note - we cannot see galaxies made of antimatter because it interacts with light in the same way as ordinary matter (there is no antiphoton). | |
| Apr 19, 2012 at 19:47 | history | edited | Marton Trencseni | CC BY-SA 3.0 | deleted 5 characters in body |
| Apr 19, 2012 at 19:41 | history | asked | Marton Trencseni | CC BY-SA 3.0 |