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SUMMARY:Heavy-Meson Mixing and Lifetimes via Gradient Flow
DTSTART:20260615T123000Z
DTEND:20260615T143000Z
DTSTAMP:20260430T040300Z
UID:indico-event-16969@indico.global
DESCRIPTION:Speakers: Antonio Rago (University of Southern Denmark)\n\nThe
  Gradient Flow is a smoothing technique that has been extensively studied 
 for its renormalization properties. In combination with the short flow-tim
 e expansion\, it provides a well-defined renormalization scheme. Within th
 is framework\, several lattice-specific challenges\, such as mixing with l
 ower-dimensional operators\, are either avoided or shifted to the perturba
 tive matching stage of the procedure.\nI will first introduce the Gradient
  Flow formalism and outline the key ideas underlying the small flow-time e
 xpansion. I will then present our strategy for determining matrix elements
  of four-quark operators relevant for neutral meson mixing and heavy-meson
  lifetimes. While meson mixing is well established on the lattice and prov
 ides a stringent validation of the method\, a first-principles lattice det
 ermination of matrix elements governing heavy-meson lifetimes and mixing r
 emains an open problem. I will present results for mesons composed of a ch
 arm and a strange quark\, together with prospects for extending the calcul
 ation to B mesons. Particular emphasis will be placed on the applicability
  constraints of this approach for the observables under consideration\, wi
 th the aim of highlighting its potential for broader applications in relat
 ed studies.\n\nhttps://indico.global/event/16969/
LOCATION:Room 5017 (Building U2 - Quantum)
URL:https://indico.global/event/16969/
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