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May 3, 2020 at 22:07 comment added MannyC Is the question "why does it behave as a free field propagator?" or "why is it important that it should behave as a free field propagator?"
May 3, 2020 at 20:40 history edited Qmechanic CC BY-SA 4.0
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Oct 18, 2019 at 8:50 history edited Qmechanic CC BY-SA 4.0
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Oct 18, 2019 at 8:50 answer added Qmechanic timeline score: 2
Nov 5, 2014 at 8:59 vote accept Jia Yiyang
May 9, 2013 at 0:52 answer added Siva timeline score: 3
May 8, 2013 at 19:03 answer added innisfree timeline score: 3
May 8, 2013 at 15:51 comment added Jia Yiyang @Kostya: I'd agree that it will reduce to free field propagator if the interaction is somehow turned off, but I can't see any connection between "$p^2\to-m^2$" and "interaction being turned off"
May 8, 2013 at 15:11 history edited Qmechanic CC BY-SA 3.0
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May 8, 2013 at 13:47 history asked Jia Yiyang CC BY-SA 3.0