BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:e+ e- data: no anomaly in the muon g-2?
DTSTART;VALUE=DATE-TIME:20261030T070000Z
DTEND;VALUE=DATE-TIME:20261030T071500Z
DTSTAMP;VALUE=DATE-TIME:20261102T005647Z
UID:indico-contribution-6177@cern.ch
DESCRIPTION:Speakers: Oleg Zenin (NRC KI -- IHEP)\nUsing an up-to-date com
 pilation of $\\sigma_{\\mathrm{tot}}(e^+e^- \\to hadrons)$ data we estimat
 ed the LO hadronic contribution $a_\\mu^{LO\\\, HVP}$ to the muon anomalou
 s magnetic moment $a_\\mu$. Incompatibilities between $\\sigma_{\\mathrm{t
 ot}}(e^+e^- \\to hadrons)$ measurements by independent experiments are mit
 igated by extra systematic uncertainties estimated using as a guideline a 
 requirement of uniformity of $\\chi^2$ distribution over degrees of freedo
 m in joint fits of $\\sigma_{\\mathrm{tot}}$. Tensions in the $e^+e^-$ inp
 ut data translate into an expanded uncertainty of the $a_\\mu^{LO\\\, HVP}
  = (697.7 \\pm {9.8}_{e^+e^-} \\pm 3.6_{sys}) \\times 10^{-10}$. Given thi
 s\, we obtain  $a_\\mu^{\\mathrm{SM}} = 11659185.5(10.6) \\times 10^{-10}$
 \, below the experimental world average $a_\\mu^{\\mathrm{exp}}$ at $2\\si
 gma$ level.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/61
 77/
LOCATION: Conference Hall 2
URL:https://indico.particle.mephi.ru/event/626/contributions/6177/
END:VEVENT
END:VCALENDAR