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Lattice QCD study of $B_s\to D_s \ell \bar\nu_\ell$ decay near zero recoil

Abstract : We study the hadronic matrix elements describing the $B_s \to D_s\ell \bar\nu_\ell$ decay in and beyond the Standard Model. By using the twisted mass QCD on the lattice with $N_f=2$ dynamical flavors we compute the normalization $\mathscr G_s(1)$ of the form factor dominating $B_s\to D_s \ell \bar\nu_\ell$ in the SM. We also make the first lattice determination of $F_0(q^2)/F_+(q^2)$ and $F_T(q^2)/F_+(q^2)$ near zero recoil (near $q^2_{\rm max}$). We briefly discuss the non-strange case $B \to D\ell \bar\nu_\ell$ as well.
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http://hal.in2p3.fr/in2p3-00948544
Contributor : Jeanine Pellet <>
Submitted on : Tuesday, February 18, 2014 - 2:31:57 PM
Last modification on : Wednesday, September 16, 2020 - 4:04:52 PM

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  • HAL Id : in2p3-00948544, version 1
  • ARXIV : 1311.5071

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Mariam Atoui, Damir Becirevic, Vincent Morenas, Francesco Sanfilippo. Lattice QCD study of $B_s\to D_s \ell \bar\nu_\ell$ decay near zero recoil. 31st International Symposium on Lattice Field Theory - LATTICE 2013, 2013, Mainz, Germany. pp.384. ⟨in2p3-00948544⟩

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