Remark on the Theoretical Uncertainty in B^0-\bar{B}^0 Mixing

Abstract

We re-examine the theoretical uncertainty in the Standard Model expression for $B^0$-${\bar{B}}^0$ mixing. We focus on lattice calculations of the ratio $\xi$, needed to relate the oscillation frequency of $B_s^0$-${\bar{B}}_s^0$ mixing to the poorly known CKM element $V_{td}$. We replace the usual linear chiral extrapolation with one that includes the logarithm that appears in chiral perturbation theory. We find a significant shift in the ratio $\xi$, from the conventional $1.15\pm 0.05$ to $\xi =1.32\pm 0.10$.

10 pp., 4 figs; text on some other papers clarified, reference added

References in corpus (1)

• B Physics at the Tevatron: Run II and Beyond

Cited by in corpus (40)

• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• Relations between ΔM_{s,d} and B_{s,d}\to μ\barμin Models with Minimal Flavour Violation
• B- and D-meson decay constants from three-flavor lattice QCD
• $B_{(s)}^0$-mixing matrix elements from lattice QCD for the Standard Model and beyond
• Charmed meson decay constants in three-flavor lattice QCD
• Probing New Physics through B Mixing: Status, Benchmarks and Prospects
• B-Bbar mixing in unquenched lattice QCD
• Atmospheric Neutrinos Can Make Beauty Strange
• Calculation of the heavy-hadron axial couplings g_1, g_2, and g_3 using lattice QCD
• Heavy meson chiral perturbation theory in finite volume
• Lattice Calculation of Heavy-Light Decay Constants with Two Flavors of Dynamical Quarks
• Staggered Chiral Perturbation Theory for Heavy-Light Mesons
• Heavy Quarks and Lattice QCD
• Improved Wilson QCD simulations with light quark masses
• Lattice measurement of the couplings g_infinity and g_Bstar_B_pi
• Neutral B-meson mixing from unquenched lattice QCD with domain-wall light quarks and static b-quarks
• Chiral corrections and lattice QCD results for fBs/fBd and (Delta ms/Delta md)
• Phenomenology from lattice QCD
• Lattice QCD at the end of 2003
• An exploratory lattice study of DI=3/2 K -> pi pi decays at next-to-leading order in the chiral expansion
• Chiral behavior of the B(s,d)-Bbar(s,d) mixing amplitude in the Standard Model and beyond
• Decay constants of P-wave heavy-light mesons from unquenched lattice QCD
• Heavy Quark Physics and Lattice QCD
• Lattice calculation of SU(3) flavor breaking ratios in B - anti-B mixing
• Heavy Quarks on the Lattice
• $B^0-{\bar{B}}^0$ mixing in quenched lattice QCD
• Status of Lattice Flavor Physics
• Long distance chiral corrections in B meson amplitudes
• Lattice results relevant to the CKM matrix determination
• Search for time-dependent B0s - B0s-bar oscillations using a vertex charge dipole technique
• Searching for chiral logs in the static-light decay constant
• What can we learn from a measurement of sin(2 beta + gamma)?
• Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t
• Remark on the Theoretical Uncertainty in $B^0$-${\bar{B}}^0$ Mixing
• Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks
• Chiral Perturbation Theory on the Lattice and its Applications
• Conference Summary (5th Int. Conf. on Hyperons, Charm, and Beauty Hadrons)
• Matrix elements of DI=3/2 K-->pi pi decays
• Role of Resonances in Heavy Meson Processes within Standard Model and Beyond
• Phenomenology of static-light mesons from unquenched lattice QCD calculations