Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-09-21
Phys.Rev. D72 (2005) 114504
Physics
High Energy Physics
High Energy Physics - Lattice
23 pages, 8 figures, RevTeX4; mentioned existence of 1/m_b corrections, minor changes improving readability
Scientific paper
10.1103/PhysRevD.72.114504
We present an unquenched lattice calculation for the SU(3) flavor breaking ratios of the heavy-light decay constants and the $\Delta B = 2$ matrix elements. The calculation was performed on $16^3 \times 32$ lattices with two dynamical flavors of domain-wall quarks and inverse lattice spacing $1/a = 1.69(5)$ GeV. Heavy quarks were implemented using an improved lattice formulation of the static approximation. In the infinite heavy-quark mass limit we obtain $f_{B_s}/f_{B_d} = 1.29(4)(6)$, $B_{B_s}/B_{B_d} = 1.06(6)(4)$, $\xi = 1.33(8)(8)$ where the first error is statistical and the second systematic.
Gadiyak Valeriya
Loktik Oleg
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