1. Bs → Kℓv form factors with 2+1 flavors
- Author
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Elvira Gamiz, R. S. Van de Water, Andreas S. Kronfeld, D. Du, J. N. Simone, Jack Laiho, Yannick Meurice, Robert L. Sugar, Alexei Bazavov, E. D. Freeland, D. Toussaint, Jon A. Bailey, Steven Gottlieb, Aida X. El-Khadra, Paul B. Mackenzie, Carleton DeTar, Urs M. Heller, Yuzhi Liu, Chris Bouchard, Claude Bernard, Ran Zhou, Zechariah Gelzer, and Ethan T. Neil
- Subjects
Quantum chromodynamics ,Quark ,Physics ,Strange quark ,Particle physics ,Valence (chemistry) ,010308 nuclear & particles physics ,Cabibbo–Kobayashi–Maskawa matrix ,High Energy Physics::Lattice ,QC1-999 ,High Energy Physics::Phenomenology ,Lattice field theory ,01 natural sciences ,Bottom quark ,Lattice constant ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics - Abstract
Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f0 and f+ for the semileptonic Bs → Kℓv decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coarsest and finest lattice spacings, the light quark mass m’l is one-tenth the strange quark mass m’s. At the intermediate lattice spacing, the ratio m’l/m’s ranges from 0.05 to 0.2. The valence b quark is treated using the Sheikholeslami-Wohlert Wilson-clover action with the Fermilab interpretation. The other valence quarks use the asqtad action. When combined with (future) measurements from the LHCb and Belle II experiments, these calculations will provide an alternate determination of the CKM matrix element |Vub|.
- Published
- 2018
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