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SUMMARY:Evolution of polarization correlations of annihilation photons dur
 ing Compton scattering
DTSTART;VALUE=DATE-TIME:20261030T143500Z
DTEND;VALUE=DATE-TIME:20261030T145000Z
DTSTAMP;VALUE=DATE-TIME:20261101T183752Z
UID:indico-contribution-6341@cern.ch
DESCRIPTION:Speakers: Mikhail Evsiukov (INR RAS)\nWe present the final res
 ults of our experimental program on the evolution of polarization correlat
 ions of annihilation photons when one of the photons undergoes Compton sca
 ttering. The correlation measure of the photon pair is extracted from the 
 measured visibility of azimuthal angular correlations by factoring out the
  analyzing power of the Compton polarimeters. In our previous work\, the m
 easurements covered forward scattering angles up to 35° and backscatterin
 g near 180°. In this work\, we extend the range to include large-angle sc
 attering\, covering the full range of Compton scattering angles. The exper
 imental results are compared with the analytical prediction based on quant
 um field theory and with the result of Monte Carlo simulations of classica
 lly correlated photons. All descriptions are found to be in agreement with
  the data over the full range of scattering angles. The behaviour of polar
 ization correlations during scattering is identical to that of classical c
 orrelations up to a constant factor of two\, which is consistent with loca
 l quantum field theory and does not require "spooky action at a distance."
  These results confirm the latest theoretical predictions and resolve the 
 "decoherence puzzle" reported earlier.\n\nhttps://indico.particle.mephi.ru
 /event/626/contributions/6341/
LOCATION: Conference Hall 2
URL:https://indico.particle.mephi.ru/event/626/contributions/6341/
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