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SUMMARY:Ioanna Kourkoulou (Columbia)
DTSTART:20210629T140000Z
DTEND:20210629T150000Z
DTSTAMP:20260513T204335Z
UID:CCTP_HEP/55
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CCTP_HEP/55/
 ">Lorentz invariance in Framids as a potential technical analog of the CCP
 </a>\nby Ioanna Kourkoulou (Columbia) as part of CCTP HEP Seminars\n\n\nAb
 stract\nThe Framid is a hypothetical system whose ground state\nspontaneou
 sly breaks boost symmetry\, however its stress-energy tensor\nretains a Lo
 rentz-invariant expectation value on the ground state\, as we\nverify expl
 icitly to one-loop order. The mechanism enforcing this result\nis rather o
 bscure\; in fact\, we think this puzzle is an interesting\ntechnical analo
 g of the cosmological constant problem. I will describe\nour computations 
 that verify the Lorentz invariance of the expectation\nvalue in question\,
  and how these yield the expected result only thanks\nto highly nontrivial
  cancellations\, which are quite mysterious from the\nlow-energy effective
  theory viewpoint.\n
LOCATION:https://researchseminars.org/talk/CCTP_HEP/55/
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