Semileptonic B-meson decays to light pseudoscalar mesons on the HISQ ensembles
Department of Physics, University of Illinois, Urbana, IL 61801, USA
2 Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USA
3 Department of Physics, Washington University, St. Louis, Missouri, 63130, USA
4 Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
5 Fermi National Accelerator Laboratory, Batavia, Illinois, USA
6 CAFPE and Departamento de Física Teórica y del Cosmos, Universidad de Granada, Granada, Spain
7 Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
8 Institute for Advanced Study, Technische Universität München, D-85748 Garching, Germany
9 Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
Published online: 26 March 2018
We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of B mesons with both charged currents (B → πlv, Bs → Klv) and neutral currents (B → πl+l-, B → Kl+l-). The results are important for constraining or revealing physics beyond the Standard Model. This work uses MILC’s (2+1 + 1)-flavor ensembles with the HISQ action for the sea and light valence quarks and the clover action in the Fermilab interpretation for the b quark. Simulations are carried out at three lattice spacings down to 0.088 fm, with both physical and unphysical sea-quark masses. We present preliminary results for correlation-function fits.
© The Authors, published by EDP Sciences, 2018
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