Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD
Abstract We address the nonperturbative calculation of the inclusive decay rate of semileptonic B (s)-meson decays from lattice QCD. Precise Standard-Model predictions are key ingredients in searches for new physics, and this type of computation may eventually provide new insight into the long-stand...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP07(2023)145 |
| _version_ | 1797647515721400320 |
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| author | Alessandro Barone Shoji Hashimoto Andreas Jüttner Takashi Kaneko Ryan Kellermann |
| author_facet | Alessandro Barone Shoji Hashimoto Andreas Jüttner Takashi Kaneko Ryan Kellermann |
| author_sort | Alessandro Barone |
| collection | DOAJ |
| description | Abstract We address the nonperturbative calculation of the inclusive decay rate of semileptonic B (s)-meson decays from lattice QCD. Precise Standard-Model predictions are key ingredients in searches for new physics, and this type of computation may eventually provide new insight into the long-standing tension between the inclusive and exclusive determinations of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |V cb | and |V ub |. We present results from a pilot lattice computation for B s → X c lν l , where the initial b quark described by the relativistic-heavy-quark (RHQ) formalism on the lattice and the other valence quarks discretised with domain-wall fermions are simulated approximately at their physical quark masses. We compare two different methods for computing the decay rate from lattice data of Euclidean n-point functions, namely Chebyshev and Backus-Gilbert approaches. We further study how much the ground-state meson dominates the inclusive decay rate and indicate our strategy towards a computation with a more comprehensive systematic error budget. |
| first_indexed | 2024-03-11T15:18:39Z |
| format | Article |
| id | doaj.art-e491af3edd924a69a57616d79c7e33fa |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T15:18:39Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-e491af3edd924a69a57616d79c7e33fa2023-10-29T12:06:37ZengSpringerOpenJournal of High Energy Physics1029-84792023-07-012023714310.1007/JHEP07(2023)145Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCDAlessandro Barone0Shoji Hashimoto1Andreas Jüttner2Takashi Kaneko3Ryan Kellermann4School of Physics and Astronomy, University of SouthamptonHigh Energy Accelerator Research Organization (KEK)School of Physics and Astronomy, University of SouthamptonHigh Energy Accelerator Research Organization (KEK)High Energy Accelerator Research Organization (KEK)Abstract We address the nonperturbative calculation of the inclusive decay rate of semileptonic B (s)-meson decays from lattice QCD. Precise Standard-Model predictions are key ingredients in searches for new physics, and this type of computation may eventually provide new insight into the long-standing tension between the inclusive and exclusive determinations of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |V cb | and |V ub |. We present results from a pilot lattice computation for B s → X c lν l , where the initial b quark described by the relativistic-heavy-quark (RHQ) formalism on the lattice and the other valence quarks discretised with domain-wall fermions are simulated approximately at their physical quark masses. We compare two different methods for computing the decay rate from lattice data of Euclidean n-point functions, namely Chebyshev and Backus-Gilbert approaches. We further study how much the ground-state meson dominates the inclusive decay rate and indicate our strategy towards a computation with a more comprehensive systematic error budget.https://doi.org/10.1007/JHEP07(2023)145Bottom QuarksHadronic Matrix Elements and Weak DecaysLattice QCDSemi-Leptonic Decays |
| spellingShingle | Alessandro Barone Shoji Hashimoto Andreas Jüttner Takashi Kaneko Ryan Kellermann Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD Journal of High Energy Physics Bottom Quarks Hadronic Matrix Elements and Weak Decays Lattice QCD Semi-Leptonic Decays |
| title | Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD |
| title_full | Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD |
| title_fullStr | Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD |
| title_full_unstemmed | Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD |
| title_short | Approaches to inclusive semileptonic B (s)-meson decays from Lattice QCD |
| title_sort | approaches to inclusive semileptonic b s meson decays from lattice qcd |
| topic | Bottom Quarks Hadronic Matrix Elements and Weak Decays Lattice QCD Semi-Leptonic Decays |
| url | https://doi.org/10.1007/JHEP07(2023)145 |
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