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SUMMARY:The smeared R-ratio in isoQCD from first-principles lattice simula
 tions
DTSTART:20260414T140000Z
DTEND:20260414T160000Z
DTSTAMP:20260510T060300Z
UID:indico-event-1657709@indico.cern.ch
DESCRIPTION:Speakers: Francesca Margari (University of Rome Tor Vergata)\n
 \nThe R-ratio is a phenomenological observable of great relevance\, both i
 n itself and in applications such as the dispersive approach to the muon a
 nomalous magnetic moment. It can be investigated from first-principles wit
 h controlled statistical and systematic errors in lattice QCD by introduci
 ng an arbitrary smearing kernel and employing spectral reconstruction tech
 niques\, such as the well-known Hansen-Lupo-Tantalo method. Improving upon
  a first study published in 2023\, we show preliminary results using the c
 orrelation functions produced by ETMC in N_f = 2+1+1 lattice simulations a
 t four lattice spacings\, different volumes and with higher statistics w.r
 .t. our previous study. The new correlators\, thanks to the implementation
  of the Low Mode Average technique\, allow the determination of the R-rati
 o smeared with Gaussian kernels of widths down to σ ∼ 200 MeV with phen
 omenologically relevant precision.\n\nhttps://indico.cern.ch/event/1657709
 /\n\nZoom: https://cern.zoom.us/j/68098777127?pwd=U2FQNDFZNGVyWW5YOTViQncw
 UmJ3UT09
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/1657709/
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