Timeline for GUT that includes all 3 particle families into a large group?
Current License: CC BY-SA 4.0
7 events
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| May 26, 2018 at 20:01 | history | edited | Nat | CC BY-SA 4.0 |
deleted 4 characters in body
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| Aug 17, 2011 at 0:26 | comment | added | arivero | Another confusing point of this answer is that Lisi's goal goes beyond GUT. The OP is just asking for theories with gauge group and families. | |
| Aug 16, 2011 at 18:02 | comment | added | Dilaton | @Warrick: Thanks for Your answer, I`m generally open-minded to different approaches ;-). But from Marek s nice explanation, I understand why Lisi s theory can not work; so I cant give an upvote but will leave it as it is ... | |
| Aug 16, 2011 at 14:07 | comment | added | Marek | fair enough. Just to be sure though, standard GUT theories are conservative generalizations of the usual SM gauge theories (e.g. SU(3)). In those theories, force particles come from adjoint representations (thus we have eight gluons for SU(3) since dimension of adjoint rep equals dimension of the group) while matter particles have to come from other reps (e.g. from 5 and 10 of SU(5)). But Lisi just mixes all this stuff up in a naive way that makes no sense, adding fermions and bosons, adjoint reps with any other rep, etc... | |
| Aug 16, 2011 at 13:56 | comment | added | Warrick | To be honest, I thought twice about putting this up as an answer. To the extent that it is an idea that is discussed by scientists (not all of the mainstream was dismissive...), I think it is an answer to the question. But this answer probably doesn't give credit to other SU(5) or SO(10) theories. Like I say, I'm just unaware of them because they haven't been as widely publicized... I'll happily remove my answer if/when its usurped by a more balanced one (or if mods feel its inappropriate to promote stuff like Lisi's). | |
| Aug 16, 2011 at 13:25 | comment | added | Marek | I don't want to downvote what appears to be an honest answer but proposing crackpotty theories such as Lisi's that contain no real physics is mocking standard GUT theories (which are perhaps not correct but at least physically and mathematically sound). | |
| Aug 16, 2011 at 11:50 | history | answered | Warrick | CC BY-SA 3.0 |