Timeline for Non-covariance of the higher rank propagator (from Weinberg's QFT textbook)
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| Oct 12, 2016 at 5:48 | 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. | |
| Sep 9, 2016 at 1:14 | 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. | |
| Aug 2, 2016 at 20:58 | 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. | |
| Jun 24, 2016 at 16:34 | history | edited | user36790 | CC BY-SA 3.0 |
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| Jun 19, 2016 at 4:57 | 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. | |
| May 17, 2016 at 1:18 | 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. | |
| Dec 3, 2015 at 23:15 | history | edited | Qmechanic♦ | CC BY-SA 3.0 |
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| Sep 22, 2015 at 0:47 | answer | added | Snoo | timeline score: 3 | |
| Feb 24, 2013 at 7:25 | history | tweeted | twitter.com/#!/StackPhysics/status/305579096207933440 | ||
| Feb 23, 2013 at 15:06 | history | edited | Jia Yiyang | CC BY-SA 3.0 |
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| Feb 23, 2013 at 14:59 | history | edited | Jia Yiyang | CC BY-SA 3.0 |
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| Feb 22, 2013 at 12:29 | comment | added | Jia Yiyang | @LubošMotl: Could you elaborate a bit more about "It's a speedy derivation with a cheating but the final expression is correct if you also incorporate ..."? If after the integration (6.2.18) actually doesn't receive contribution from off-shell momenta, shouldn't (6.2.18) just be covariant(though not manifestly)? I don't quite see how the comment below (6.2.18) can make it non-covariant. Asfor the proof in chap 3.5, I totally agree with what you said, but just want to see exactly at which step this formal and naive derivation fails. | |
| Feb 21, 2013 at 14:26 | history | edited | Jia Yiyang | CC BY-SA 3.0 |
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| Feb 21, 2013 at 11:14 | comment | added | Luboš Motl | The expression 6.2.18 is written for a generally off-shell value of $P_{lm}$ but if you trace it, it's clear that the original expression didn't depend on $P_{lm}$ at off-shell momenta so the final (6.2.18) can't, either. It's a speedy derivation with a cheating but the final expression is correct if you also incorporate the comments below (6.2.18) which actually tell you how the $P_{lm}$ should be defined away from the mass shell so that it works... Indeed, the proof in 3.5 is "formal" which is the same as "naive" and when trying to make it explicit, there are sometimes subtleties. | |
| Feb 21, 2013 at 10:44 | history | asked | Jia Yiyang | CC BY-SA 3.0 |