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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>-Meson Decay Constant from Unquenched Lattice QCD
We present determinations of the $B$-meson decay constant ${f}_{B}$ and of the ratio ${f}_{{B}_{s}}/{f}_{B}$ using the MILC Collaboration unquenched gauge configurations, which include three flavors of light sea quarks. The mass of one of the sea quarks is kept around the strange quark mass, and we explore a range in …