Lattice QCD study of inclusive semileptonic decays of heavy mesons
2022; Springer Nature; Volume: 2022; Issue: 7 Linguagem: Inglês
10.1007/jhep07(2022)083
ISSN1127-2236
AutoresPaolo Gambino, S. Hashimoto, Sandro Mächler, Marco Panero, Francesco Sanfilippo, Silvano Simula, Antonio Smecca, Nazario Tantalo,
Tópico(s)High-Energy Particle Collisions Research
ResumoWe present an ab initio study of inclusive semileptonic decays of heavy mesons from lattice QCD. Our approach is based on a recently proposed method, that allows one to address the study of these decays from the analysis of smeared spectral functions extracted from four-point correlators on the lattice, where the smearing is defined in terms of the phase-space integration relevant to the inclusive decays. We present results obtained from gauge-field ensembles from the JLQCD and ETM collaborations, and discuss their relation with theoretical predictions from the operator-product expansion.
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