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SUMMARY:The ρ and K* resonances using lattice QCD with physical quark mas
 ses - Nelson Lachini (DAMTP)
DTSTART:20241108T160000Z
DTEND:20241108T170000Z
UID:TALK224248@talks.cam.ac.uk
CONTACT:Nico Gubernari
DESCRIPTION:The ρ and K٭ resonances play a central role in Standard Mode
 l tests due to their decays into ππ and Kπ states via the strong intera
 ction\, respectively. In this talk\, we present our study of the ρ and K
 ٭ resonances employing physical quark masses and review the required theo
 retical and methodological framework used for analysing scattering from la
 ttice QCD observables. In particular\, we study finite-volume energies in 
 various moving frames and obtain phase-shift parameterisations through the
  Lüscher formalism. The resonance poles on the ππ and Kπ scattering am
 plitudes are then obtained via an analytical continuation into the complex
  plane. We estimate the systematic effects due to analysis choices by deve
 loping a data-driven procedure based on the Akaike information criterion. 
 We conclude by comparing our results to the current PDG estimates\, and co
 mment on other relevant systematic effects and future calculations.
LOCATION:MR19 (Potter Room\, Pavilion B)\, CMS
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