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SUMMARY:Searching for new physics during gravitational waves propagation
DTSTART;VALUE=DATE-TIME:20220321T141500Z
DTEND;VALUE=DATE-TIME:20220321T143000Z
DTSTAMP;VALUE=DATE-TIME:20260906T151948Z
UID:indico-contribution-2222@indico.tlabs.ac.za
DESCRIPTION:Speakers: Leïla Haegel (APC Laboratory (Uni.Paris / CNRS))\nT
 he direct detection of gravitational waves opened an unprecedented channel
  to probe fundamental physics. Proposed extensions of our current theories
  predict a dispersion of the gravitational waves during their propagation\
 , leading to a modification of the signals observed by ground-based interf
 erometers compared to their predictions from general relativity. In this t
 alk\, I present several analyses probing different alternative models of g
 ravitation with various observables. Using the multimessenger events consi
 sting of gravitational waves and their electromagnetic counterpart\, the s
 peed of gravity is measured by comparing the arrival time of the two signa
 ls while extra dimensions and scalar-tensor theories are constrained from 
 the comparison of the luminosity distance inferred independently from both
  signals. Relying only on gravitational wave signals\, a large class of pr
 oposed theories\, including as the existence of massive graviton\, predict
  a frequency-dependent dispersion of the gravitational waves breaking loca
 l CPT and/or Lorentz symmetry. Constraints on the modified dispersion rela
 tion and effective field theories coefficients are obtained from the analy
 sis of the third LIGO-Virgo detections catalog.\n\nhttps://indico.tlabs.ac
 .za/event/109/contributions/2222/
LOCATION:
URL:https://indico.tlabs.ac.za/event/109/contributions/2222/
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