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SUMMARY:Precision Determinations of the Fine-structure Constant
DTSTART:20251027T080000Z
DTEND:20251031T150000Z
DTSTAMP:20260906T115100Z
UID:indico-event-417@indico.mitp.uni-mainz.de
CONTACT:ALPHA2025@uni-mainz.de
DESCRIPTION:The viability of the anomalous magnetic moment of the electron
 \, $a_e$\, as a powerful probe of physics beyond the Standard Model (BSM)\
 , depends crucially on independent input for the fine-structure constant $
 \\alpha$. At present\, the two most precise determinations\, from atom int
 erferometry using Cs and Rb atoms\, respectively\, differ by $5.4\\sigma$.
  Moreover\, the precision of the SM prediction for $a_e$ is limited by the
  knowledge of higher-order QED calculations and hadronic vacuum polarizati
 on\, which will become relevant once the current puzzle in $\\alpha$ is re
 solved.\nIn the workshop\, we aim to make progress regarding precision mea
 surements and calculations of $\\alpha$ and $a_e$\, to try and resolve the
  current tensions and further improve the precision. In addition\, the wor
 kshop will explore alternative approaches for precision determinations of 
 $\\alpha$ --- bound-state $g$-factors and muonic spectroscopy --- to ident
 ify the best strategies to constrain BSM effects in $a_e$ at the highest p
 recision achievable. When combined with $a_\\mu$\, the result has immediat
 e consequences for the flavor and chirality structure of potential BSM eff
 ects accessible with lepton anomalous magnetic moments.\n\nhttps://indico.
 mitp.uni-mainz.de/event/417/
IMAGE;VALUE=URI:https://indico.mitp.uni-mainz.de/event/417/logo-2082406262
 .png
LOCATION:2413/2-430 - MITP Seminar Room (MITP - Mainz Institute for Theore
 tical Physics\, Johannes Gutenberg University Mainz)
URL:https://indico.mitp.uni-mainz.de/event/417/
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