Update on $B\to D^\ast \ell \nu$ form factor at zero-recoil using the Oktay-Kronfeld action
| Autor: | Bhattacharya, Tanmoy, Gupta, Rajan, Park, Sungwoo, Jang, Yong-Chull, Bailey, Jon A., Choi, Benjamin J., Jeong, Hwancheol, Jwa, Seungyeob, Lee, Sunkyu, Lee, Weonjong, Pak, Jeonghwan, Leem, Jaehoon |
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| Rok vydání: | 2018 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.22323/1.334.0283 |
| Popis: | We present an update on the calculation of $\bar{B}\to D^\ast \ell \bar{\nu}$ semileptonic form factor at zero recoil using the Oktay-Kronfeld bottom and charm quarks on $N_f=2+1+1$ flavor HISQ ensembles generated by the MILC collaboration. Preliminary results are given for two ensembles with $a\approx 0.12$ and $0.09$ fm and $M_\pi\approx 310$ MeV. Calculations have been done with a number of valence quark masses, and the dependence of the form factor on them is investigated on the $a\approx 0.12$ fm ensemble. The excited state is controlled by using multistate fits to the three-point correlators measured at 4--6 source-sink separations. Comment: 7 pages and 4 figures. Talk at The 36th Annual International Symposium on Lattice Field Theory - LATTICE2018 |
| Databáze: | arXiv |
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