Timeline for Does time symmetry cause the matter/antimatter asymmetry?
Current License: CC BY-SA 4.0
17 events
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| Mar 25, 2023 at 1:01 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 21, 2023 at 0:17 | answer | added | klippo | timeline score: 1 | |
| Sep 21, 2021 at 21:46 | comment | added | John Hunter | @mebaker it would be great if lots of people work on it and hopefully on a new cosmological model too, (please see links in profile). Unfortunately despite trying hard to have things published no publisher seems interested, that's a disappointment. It's great that you are also part of the effort to improve our physics theories... | |
| Sep 21, 2021 at 18:28 | comment | added | mebaker | Is anyone working on this, I have been very curious about this as well? | |
| S Jul 16, 2021 at 12:07 | history | bounty ended | CommunityBot | ||
| S Jul 16, 2021 at 12:07 | history | notice removed | CommunityBot | ||
| Jul 12, 2021 at 8:31 | comment | added | John Hunter | @ Andrew With the proposal there is no longer a matter-antimatter asymmetry and also no longer a time asymmetry. It's equally valid to say we live in an antimatter universe with time moving backwards. It actually removes an assumption that we usually make that time is moving forwards, so Occam's razor would favour it. | |
| Jul 11, 2021 at 22:29 | comment | added | Andrew | I don't think this resolves the matter-antimatter asymmetry. It just changes the question to: why does one direction of time's flow lead to a "matter" asymmetry, and the other lead to an "anti-matter" asymmetry? If everything were symmetric you would expect Universes with both possible directions of time to be equally likely to be "matter dominated" or "anti-matter" dominated. So to me it seems this hypothesis adds additional theoretical elements (Universes with time flowing backward) without explaining anything new, so it should be disfavored by Occam's Razor. | |
| Jul 9, 2021 at 17:39 | comment | added | John Hunter | @ Richard Myers Yes, true, it just meant with the other transformations i.e. CPT invariance | |
| Jul 9, 2021 at 17:25 | comment | added | Richard Myers | Particle physics is not, in fact, time reversal symmetric. It is CPT invariant as you say, but CPT invariance does not imply T invariance. In fact, CP violation was a major experimental observation in the 60s (or 70s, can't quite recall). | |
| Jul 9, 2021 at 9:00 | history | tweeted | twitter.com/StackPhysics/status/1413422701792964609 | ||
| S Jul 8, 2021 at 10:41 | history | bounty started | John Hunter | ||
| S Jul 8, 2021 at 10:41 | history | notice added | John Hunter | Draw attention | |
| Jun 30, 2021 at 21:12 | comment | added | John Hunter | The mirror universe looks interesting, thanks. The time symmetry of this question combines the two universes into one, where either direction is ok and it's not possible to tell which it is for the universe. | |
| Jun 30, 2021 at 9:08 | comment | added | PM 2Ring | I think it's valid, but I don't know if it's true. ;) FWIW, here's a question I answered about a mirror universe resolving the antimatter abundance problem: physics.stackexchange.com/q/487301/123208 (but I don't think your question's a duplicate of that one). | |
| Jun 30, 2021 at 8:39 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
Res. recom. can usually not be mixed with an actual physics q
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| Jun 30, 2021 at 8:09 | history | asked | John Hunter | CC BY-SA 4.0 |