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SUMMARY:Positronium contribution to the electron g-2
DTSTART:20151214T140000
DTEND:20151214T150000
DTSTAMP:20260509T175301Z
UID:3467fa477054cc4bac50b79d8e3f948d9e94d75e73c9467b7df0ad30
CATEGORIES:Conferences - Seminars
DESCRIPTION:Matteo Fael\nThe contribution of positronium to the electron g
 -2 has been computed by G. Mishima in\narXiv:1311.7109\, and found to be o
 f the same order of α as that of five-loop perturbative QED.\nIn arXiv:14
 02.5690\, K. Melnikov\, A. Vainshtein\, and M. Voloshin pointed out the pr
 esence of also a continuum nonperturbative contribution that cancels one-h
 alf of the positronium one.\nIn this talk I will review these two papers\,
  and further show\, as firstly argued by Melnikov et al.\, that the remain
 ing one-half is already included in the five-loop perturbative result and 
 it arises from the class I(i) of five-loop diagrams containing only one cl
 osed electron loop.
LOCATION:Cubotron BSP 727 http://plan.epfl.ch/?room=BSP%20727
STATUS:CONFIRMED
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