Form factors for semileptonic B-decays with HISQ light quarks and clover b-quarks in Fermilab interpretation

We compute the vector, scalar, and tensor form factors for the \(B\to \pi\), \(B\to K\), and \(B_s\to K\) amplitudes, which are needed to describe semileptonic \(B\)-meson decay rates for both the charged and neutral current cases. We use the highly improved staggered quark (HISQ) action for the sea...

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Published inarXiv.org
Main Authors Jeong, Hwancheol, DeTar, Carleton, El-Khadra, Aida, Gámiz, Elvira, Gelzer, Zechariah, Gottlieb, Steven, Jay, William, Kronfeld, Andreas, Lytle, Andrew, Vaquero, Alejandro
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.02.2024
Subjects
Decay rate
Form factors
Neutral currents
Particle decay
Quarks
Tensors
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Summary:We compute the vector, scalar, and tensor form factors for the \(B\to \pi\), \(B\to K\), and \(B_s\to K\) amplitudes, which are needed to describe semileptonic \(B\)-meson decay rates for both the charged and neutral current cases. We use the highly improved staggered quark (HISQ) action for the sea and light valence quarks. The bottom quark is described by the clover action in the Fermilab interpretation. Simulations are carried out on \(N_f = 2+1+1\) MILC HISQ ensembles at approximate lattice spacings from \(0.15\) fm down to \(0.057\) fm. We present blinded preliminary results for the form factors.
ISSN:2331-8422