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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2603.23702 |
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| _version_ | 1866918413968867328 |
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| author | Cassar, Nicholas Chauhan, Akhil DeTar, Carleton El-Khadra, Aida Gámiz, Elvira Gottlieb, Steven Jay, William I. Kronfeld, Andreas S. Laiho, Jack Lytle, Andrew Vaquero, Alejandro |
| author_facet | Cassar, Nicholas Chauhan, Akhil DeTar, Carleton El-Khadra, Aida Gámiz, Elvira Gottlieb, Steven Jay, William I. Kronfeld, Andreas S. Laiho, Jack Lytle, Andrew Vaquero, Alejandro |
| contents | We present a lattice-QCD calculation of the hadronic form factors for $B$-meson semileptonic decays computed using the highly improved staggered quark action for both valence and sea quarks on the MILC collaborations 2+1+1-flavor ensembles with lattice spacing ranging from 0.09 fm to 0.03 fm, many with physical pion masses On our finest ensembles, we compute the form factors directly at the physical $b$-quark mass. We discuss the computational setup and analysis strategies for two- and three-point correlation functions. For $B_{(s)} \to D_{(s)}$ we present preliminary results of chiral-continuum fits for the scalar and vector form factors. The goal of this project is a percent-level determination of the scalar and vector form factors to enable high-precision determinations of $|V_{ub}|$ and $|V_{cb}|$. This work fits into a broader program of lattice-QCD studies of weak $B$-meson decays by the Fermilab Lattice and MILC Collaborations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_23702 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | $B \to π$, $B_{(s)} \to D_{(s)}$ from 2+1+1 Flavor Lattice QCD Cassar, Nicholas Chauhan, Akhil DeTar, Carleton El-Khadra, Aida Gámiz, Elvira Gottlieb, Steven Jay, William I. Kronfeld, Andreas S. Laiho, Jack Lytle, Andrew Vaquero, Alejandro High Energy Physics - Lattice We present a lattice-QCD calculation of the hadronic form factors for $B$-meson semileptonic decays computed using the highly improved staggered quark action for both valence and sea quarks on the MILC collaborations 2+1+1-flavor ensembles with lattice spacing ranging from 0.09 fm to 0.03 fm, many with physical pion masses On our finest ensembles, we compute the form factors directly at the physical $b$-quark mass. We discuss the computational setup and analysis strategies for two- and three-point correlation functions. For $B_{(s)} \to D_{(s)}$ we present preliminary results of chiral-continuum fits for the scalar and vector form factors. The goal of this project is a percent-level determination of the scalar and vector form factors to enable high-precision determinations of $|V_{ub}|$ and $|V_{cb}|$. This work fits into a broader program of lattice-QCD studies of weak $B$-meson decays by the Fermilab Lattice and MILC Collaborations. |
| title | $B \to π$, $B_{(s)} \to D_{(s)}$ from 2+1+1 Flavor Lattice QCD |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2603.23702 |