Speaker
Description
In this talk, I review recent progress in the theoretical description of heavy-hadron lifetimes across different flavor systems, ranging from heavy–light mesons and baryons to doubly heavy hadrons. I discuss how spectator effects, weak annihilation, and Pauli interference contribute to lifetime differences among hadrons with the same heavy quark, and how these effects can be quantified using nonperturbative inputs such as NRQCD and lattice QCD. Particular emphasis will be placed on recent calculations of higher-order corrections and their impact on precision predictions.
I will compare theoretical predictions with available experimental measurements and highlight the remaining theoretical uncertainties. These studies provide a coherent picture of heavy-hadron lifetimes across flavor systems and offer important benchmarks for testing our understanding of weak decays and nonperturbative QCD.
The presentation will be based on my recent papers:
J. Gratrex, B. Melić, I. Nišandžić: Lifetimes of singly charmed baryons, JHEP 07 (2022) 058;
J. Gratrex, A. Lenz, B. Melić, I. Nišandžić, M.L. Piscopo: Quark-hadron duality at work: lifetimes of bottom baryons, JHEP 04 (2023)034;
L. Dulibić, J. Gratrex, B. Melić, I. Nišandžić: Revisiting lifetimes of doubly charmed baryons, JHEP 07 (2023)061;
L. Dulibić, B. Melić, I. Nišandžić:New Predictions for the Lifetimes of Doubly Heavy Baryons and the Bc Meson e-Print: 2605.04967 [hep-ph]