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SUMMARY:Experimental Validation of QED in Highly Charged Tin Ions through 
 g-Factor Measurements [HYBRID]
DTSTART:20251126T130000Z
DTEND:20251126T140000Z
DTSTAMP:20260916T001800Z
UID:indico-event-23256@indico.gsi.de
CONTACT:ap-secr@gsi.de\;06159-71-1879
DESCRIPTION:Speakers: Jonathan Morgner (Max Planck Institute for Nuclear P
 hysics)\n\nPresented is a comprehensive experimental study of the bound-el
 ectron g-factors in three charge states of highly charged tin ions – hyd
 rogen-like\, lithiumlike\, and boronlike - performed using the ALPHATRAP P
 enning-trap setup. These measurements represent the first high-precision d
 eterminations of g-factors in tin ions with atomic number Z = 50\, extendi
 ng the reach of quantum electrodynamics (QED) tests via g factors into a p
 reviously unexplored regime of strong nuclear fields. All three g factors 
 were measured with 0.5 parts per billion (ppb) precision. The hydrogenlike
  measurement provides a stringent test of one-electron QED contributions. 
 Lithiumlike tin enables a sensitive probe of interelectronic interactions.
  The boronlike tin measurement allows for the study of many-electron dynam
 ics with non-zero orbital angular momentum in extreme fields. All three hi
 gh-precision measurements are the first in the medium-to-high Z regime\, m
 arking a major step for tests of fundamental physics in the heavy ion regi
 me. The experimental results are in good agreement with state-of-the-art a
 b initio QED calculations. Furthermore\, by combining the g factors of dif
 ferent charge states\, we demonstrate enhanced tests of QED and the potent
 ial for an independent determination of the fine-structure constant.\n \n
 \nhttps://gsi-fair.zoom.us/j/63856816325Meeting-ID: 638 5681 6325Passcode:
  AP_Seminardial by phone+496938079884\,\,63856816325#\,\,\,\,*8527227260# 
 Deutschland+496950500951\,\,63856816325#\,\,\,\,*8527227260# Deutschland 
 \n \n\nhttps://indico.gsi.de/event/23256/
LOCATION:KBW 2.028 & 638 5681 6325 (GSI & Zoom)
URL:https://indico.gsi.de/event/23256/
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