PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Poster
$B_s \to D^{(*)}_s$ form factors from lattice QCD with ${\rm N_f}=2$ Wilson-clover quarks
B. Blossier, P.H. Cahue, J. Heitger, S. La Cesa, J. Neuendorf* and S. Zafeiropoulos
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Pre-published on: May 16, 2022
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We report on a two-flavour lattice QCD determination of the $B_s\to D_s$
and $B_s\to D_s^*$ transitions, which in the heavy quark limit can be
parameterised by the form factors $\mathcal{G}$, and $h_{\text A_1}$, $h_{\text A_2}$ and
$h_{\text A_3}$. In the search of New Physics through tests of lepton-flavour
universality, $B_s$ decay channels are complementary to $B$ decays and
widely studied at $B$ factories and LHCb. The purpose of our study is to
explore a suitable method to extract form factors associated with $b\to c$
currents from lattice QCD. In particular, we present numerical results for
$\mathcal{G}$ and $h_{\text A_1}$.
DOI: https://doi.org/10.22323/1.396.0056
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