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SUMMARY:Towards hadronic D decays from lattice QCD: Methodology and strong
  phase determination
DTSTART:20261006T140000Z
DTEND:20261006T150000Z
DTSTAMP:20261108T230600Z
UID:indico-event-1731497@indico.cern.ch
DESCRIPTION:Speakers: Matthew Black\n\nCP violation in hadronic $D$-meson 
 decays provides a complementary probe of physics within and beyond the Sta
 ndard Model to the better-established kaon and $B$-meson systems. Followin
 g the discovery of charm CP violation by LHCb in 2019\, we are still at an
  early stage in understanding its origin\, while significant tensions rema
 in between experimental results and theoretical predictions. A major obsta
 cle is the poor control of the hadronic matrix elements governing these de
 cays\, which calls for precise\, first-principles calculations using latti
 ce QCD.\nIn this talk\, I will present the status of an ongoing SU(3)-flav
 our-symmetric lattice QCD calculation of the amplitude for a $D$ meson dec
 aying to a $K\\pi$ final state. This calculation constitutes the first ste
 p towards a fully non-perturbative description of hadronic $D$ decays.\nTh
 e calculation is performed at three lattice spacings\, and we investigate 
 two approaches to the continuum limit: taking the limit after extracting t
 he scattering parameters\, and taking it directly at fixed physical volume
  before extracting those parameters.\nFinally\, I will outline how the sam
 e operator basis can be used to compute three-point correlation functions 
 and determine the finite-volume matrix element $\\langle (K\\pi)_{\\mathbf
 {27}}|H_W|D\\rangle$ for the tree-level effective weak Hamiltonian $H_W$\,
  providing a path towards a first-principles calculation of hadronic $D$-d
 ecay amplitudes.\n\nhttps://indico.cern.ch/event/1731497/\n\nZoom: https:/
 /cern.zoom.us/j/68098777127?pwd=U2FQNDFZNGVyWW5YOTViQncwUmJ3UT09
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/1731497/
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