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SUMMARY:Probing “Continuous Spin” QED with Rare Atomic Transitions
DTSTART:20260527T193000Z
DTEND:20260527T213000Z
DTSTAMP:20260624T211700Z
UID:indico-event-10547@indico.slac.stanford.edu
DESCRIPTION:Speakers: Aidan Reilly\n\nAn intriguing and elementary possibi
 lity is that familiar massless particles like the photon could be “conti
 nuous spin'' particles (CSP) with a small but non-zero spin Casimir $\\rho
 $. In this case\, the familiar two polarization states of the photon are a
 ccompanied by an infinite tower of integer spaced helicity modes\, with co
 uplings dictated entirely by Lorentz symmetry and the parameter $\\rho$. 
  We present a formalism for computing bound state atomic transitions when
  $\\rho \\neq 0$\, employing path integral methods not often used for boun
 d state computations\, but that readily generalize to the CSP case.  We c
 ompute several illustrative amplitudes and show that\, in addition to modi
 fying known channels\, $\\rho \\neq 0$ also opens new decay channels for a
 tomic transitions with rates controlled by $\\rho\\alpha/\\omega$ for tran
 sition frequency $\\omega$. These corrections can appreciably modify atomi
 c decay rates suggesting new directions for fundamental tests of QED in la
 boratory experiments. \n\nhttps://indico.slac.stanford.edu/event/10547/
LOCATION:48/2-224 - Madrone (SLAC)
URL:https://indico.slac.stanford.edu/event/10547/
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