2 papers
hep-ph2024
Total decay rates of mesons at NNLO-QCD
Manuel Egner, Matteo Fael, Alexander Lenz +4
We update the Standard Model (SM) predictions for the lifetimes of the , and mesons within the heavy quark expansion (HQE), including the recently determined NNLO-…
hep-ph2024
HQET sum rules for matrix elements of dimension-six four-quark operators for meson lifetimes within and beyond the Standard Model
Matthew Black, Martin Lang, Alexander Lenz +1
Theory predictions of heavy-hadron lifetime ratios critically depend on precise determinations of the dimension-six spectator effects arising from the double insertion of the weak…