Lattice calculation of SU(3) flavor breaking ratios in B - anti-B mixing
Gadiyak, Valeriya · Loktik, Oleg
Original · EN
We present an unquenched lattice calculation for the SU(3) flavor breaking ratios of the heavy-light decay constants and the ΔB = 2 matrix elements. The calculation was performed on 16³ × 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 fBₛ/fBd = 1.29(4)(6), BBₛ/BBd = 1.06(6)(4), ξ= 1.33(8)(8) where the first error is statistical and the second systematic.
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