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Towards the computation of inclusive decay rates using lattice QCD
by Paolo Gambino, Shoji Hashimoto, Sandro Mächler, Marco Panero, Francesco Sanfilippo, Silvano Simula, Antonio Smecca, Nazario Tantalo
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Submission summary
| Authors (as registered SciPost users): | Antonio Smecca |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2209.15494v1 (pdf) |
| Date accepted: | 2023-07-04 |
| Date submitted: | 2022-10-03 14:17 |
| Submitted by: | Smecca, Antonio |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 51st International Symposium on Multiparticle Dynamics (ISMD2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational, Phenomenological |
Abstract
We present a non-perturbative computation of inclusive rates of semileptonic decays of heavy mesons from lattice QCD simulations. The calculation is based on the extraction of smeared spectral functions obtained from four-point Euclidean correlation functions computed on configuration ensembles of the JLQCD and ETM collaborations. We compare our results for the inclusive decay rates with analytical predictions from the operator-product expansion, finding a good agreement for the calculation of the inclusive decay rate. This opens the path to the theoretical determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $V_{cb}$ to a level of precision competitive with the present experimental uncertainty.
Published as SciPost Phys. Proc. 15, 004 (2024)