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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Accès en ligne: | https://arxiv.org/abs/2401.01561 |
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| _version_ | 1866929606668320768 |
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| author | Bhattacharya, Tanmoy Choi, Benjamin J. Gupta, Rajan Jang, Yong-Chull Jwa, Seungyeob Kim, Sunghee Lee, Sunkyu Lee, Weonjong Leem, Jaehoon Pak, Jeonghwan Park, Sungwoo |
| author_facet | Bhattacharya, Tanmoy Choi, Benjamin J. Gupta, Rajan Jang, Yong-Chull Jwa, Seungyeob Kim, Sunghee Lee, Sunkyu Lee, Weonjong Leem, Jaehoon Pak, Jeonghwan Park, Sungwoo |
| contents | We present recent progress in calculating the semileptonic form factors $h_{A_1}(w)$ for the $\bar{B} \to D^{\ast} \ell \barν$ decays. We use the Oktay-Kronfeld (OK) action for the charm and bottom valence quarks and the HISQ action for light quarks. We adopt the Newton method combined with the scanning method to find a good initial guess for the $χ^2$ minimizer in the fitting of the 2pt correlation functions. The main advantage is that the Newton method lets us to consume all the time slices allowed by the physical positivity. We report the first, reliable, but preliminary results for $h_{A_1}(w)/ρ_{A_1}$ at zero recoil ($w=1$). Here we use a MILC HISQ ensemble ($a = 0.12$ fm, $M_π$ = 220 MeV, and $N_f = 2 + 1 + 1$ flavors). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01561 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Current progress on the semileptonic form factors for $\bar{B} \to D^{\ast} \ell \barν$ decay using the Oktay-Kronfeld action Bhattacharya, Tanmoy Choi, Benjamin J. Gupta, Rajan Jang, Yong-Chull Jwa, Seungyeob Kim, Sunghee Lee, Sunkyu Lee, Weonjong Leem, Jaehoon Pak, Jeonghwan Park, Sungwoo High Energy Physics - Lattice High Energy Physics - Phenomenology We present recent progress in calculating the semileptonic form factors $h_{A_1}(w)$ for the $\bar{B} \to D^{\ast} \ell \barν$ decays. We use the Oktay-Kronfeld (OK) action for the charm and bottom valence quarks and the HISQ action for light quarks. We adopt the Newton method combined with the scanning method to find a good initial guess for the $χ^2$ minimizer in the fitting of the 2pt correlation functions. The main advantage is that the Newton method lets us to consume all the time slices allowed by the physical positivity. We report the first, reliable, but preliminary results for $h_{A_1}(w)/ρ_{A_1}$ at zero recoil ($w=1$). Here we use a MILC HISQ ensemble ($a = 0.12$ fm, $M_π$ = 220 MeV, and $N_f = 2 + 1 + 1$ flavors). |
| title | Current progress on the semileptonic form factors for $\bar{B} \to D^{\ast} \ell \barν$ decay using the Oktay-Kronfeld action |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.01561 |