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- W3026028211 abstract "Abstract We report on a two-flavor lattice QCD estimate of the $$B_s$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:math> and $$B^*_s$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mo>∗</mml:mo></mml:msubsup></mml:math> leptonic decays parameterized by the decay constants $$f_{B_s}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub></mml:math> and $$f_{B^*_s}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>f</mml:mi><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mo>∗</mml:mo></mml:msubsup></mml:msub></mml:math> . In addition to their relevance for phenomenology, their extraction has allowed us to investigate whether the “step scaling in mass” strategy is suitable with Wilson–Clover fermions to smoothly extrapolate quantities of the heavy-strange sector up to the bottom scale. From the central value of $$f_{D_s}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>D</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub></mml:math> quoted by FLAG at $$N_f=2$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>N</mml:mi><mml:mi>f</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math> and our ratio $$frac{f_{B_s}}{f_{D_s}}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mfrac><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>D</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub></mml:mfrac></mml:math> , we obtain $$f_{B_s}=215(10)(2)(^{+2}_{-5})$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub><mml:mo>=</mml:mo><mml:mn>215</mml:mn><mml:mrow><mml:mo>(</mml:mo><mml:mn>10</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:msubsup><mml:mo>(</mml:mo><mml:mrow><mml:mo>-</mml:mo><mml:mn>5</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msubsup><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> MeV and $$f_{B^*_s}/f_{B_s}=1.02(2)(^{+2}_{-0})$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>f</mml:mi><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mo>∗</mml:mo></mml:msubsup></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>f</mml:mi><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:msub><mml:mo>=</mml:mo><mml:mn>1.02</mml:mn><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:msubsup><mml:mo>(</mml:mo><mml:mrow><mml:mo>-</mml:mo><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msubsup><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> ." @default.
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- W3026028211 date "2020-05-01" @default.
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- W3026028211 title "Decay constant of $$B_s$$ and $$B^*_s$$ mesons from $$mathrm{N_f}=2$$ lattice QCD" @default.
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