Inclusive semileptonic decays of the $D_{s}$ meson: Lattice QCD confronts experiments
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| Autores principales: | , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866915496375353344 |
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| author | De Santis, Alessandro Evangelista, Antonio Frezzotti, Roberto Gagliardi, Giuseppe Gambino, Paolo Garofalo, Marco Groß, Christiane Franziska Kostrzewa, Bartosz Lubicz, Vittorio Margari, Francesca Panero, Marco Sanfilippo, Francesco Simula, Silvano Smecca, Antonio Tantalo, Nazario Urbach, Carsten |
| author_facet | De Santis, Alessandro Evangelista, Antonio Frezzotti, Roberto Gagliardi, Giuseppe Gambino, Paolo Garofalo, Marco Groß, Christiane Franziska Kostrzewa, Bartosz Lubicz, Vittorio Margari, Francesca Panero, Marco Sanfilippo, Francesco Simula, Silvano Smecca, Antonio Tantalo, Nazario Urbach, Carsten |
| contents | We present the results of a first-principles theoretical study of the inclusive semileptonic decays of the $D_{s}$ meson. We performed a state-of-the-art lattice QCD calculation by taking into account all sources of systematic errors. A detailed discussion of our lattice calculation, demonstrating that inclusive semileptonic decays can nowadays be studied on the lattice at a phenomenologically relevant level of accuracy, is the subject of a companion paper [1]. Here we focus on the phenomenological implications of our results. Using the current best estimates of the relevant Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, our theoretical predictions for the decay rate and for the first two lepton-energy moments are in very good agreement with the corresponding experimental measurements. We also argue that, while the inclusive $D_{s}$ channel is not yet competitive with the exclusive channels in the $|V_{cs}|$ determination, the situation can be significantly improved in the near future. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_06064 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inclusive semileptonic decays of the $D_{s}$ meson: Lattice QCD confronts experiments De Santis, Alessandro Evangelista, Antonio Frezzotti, Roberto Gagliardi, Giuseppe Gambino, Paolo Garofalo, Marco Groß, Christiane Franziska Kostrzewa, Bartosz Lubicz, Vittorio Margari, Francesca Panero, Marco Sanfilippo, Francesco Simula, Silvano Smecca, Antonio Tantalo, Nazario Urbach, Carsten High Energy Physics - Lattice High Energy Physics - Phenomenology We present the results of a first-principles theoretical study of the inclusive semileptonic decays of the $D_{s}$ meson. We performed a state-of-the-art lattice QCD calculation by taking into account all sources of systematic errors. A detailed discussion of our lattice calculation, demonstrating that inclusive semileptonic decays can nowadays be studied on the lattice at a phenomenologically relevant level of accuracy, is the subject of a companion paper [1]. Here we focus on the phenomenological implications of our results. Using the current best estimates of the relevant Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, our theoretical predictions for the decay rate and for the first two lepton-energy moments are in very good agreement with the corresponding experimental measurements. We also argue that, while the inclusive $D_{s}$ channel is not yet competitive with the exclusive channels in the $|V_{cs}|$ determination, the situation can be significantly improved in the near future. |
| title | Inclusive semileptonic decays of the $D_{s}$ meson: Lattice QCD confronts experiments |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.06064 |