Chiral corrections and lattice QCD results for f/f and Δm/Δm

2002/11/30 by Damir Becirevic, Damir Bečirević, Svjetlana Fajfer +3 · 4 citations
Physics and Astronomy · #Chiral perturbation theory #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Mathematical physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ex #hep-lat #hep-ph

paper · pdf · doi:10.1016/s0370-2693(03)00653-1

published as Phys.Lett. B563 (2003) 150-156 · Published version

openalex publication_date 2003/05/19 · arxiv created 2003/09/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

It has been argued recently that the inclusion of the chiral logarithms in extrapolation of the lattice data can shift the value of the hadronic parameter xi = (fBs sqrt(B_Bs))/(fBd sqrt(B_Bd)), from 1.16(6) to 1.32(10) and even higher. If true, that would considerably change the theoretical estimate for the ratio of oscillation frequencies in the neutral Bs- and Bd-systems, and would affect the standard CKM unitarity triangle analysis. In this letter we show that (fBs/fBd) ≈ (fK/fpi), and thus the uncertainty due to the missing chiral logs is smaller than previously thought. By combining the NLO chiral expansion with the static heavy quark limit we obtain xi = 1.22(8).

Citations

• The ratio (fBs/fB)/(fDs/fD) and its implications forB-B¯ mixing
• Chiral perturbation theory to one loop
• Chiral perturbation theory: Expansions in the mass of the strange quark
• A new approach to a global fit of the CKM matrix
• B-parameters of the complete set of matrix elements of (ΔB = 2) operators from the lattice
• Review of particle properties
• Review of Particle Physics

Cited by

• Pseudoscalar decay constants of kaon andD-mesons fromNf= 2 twisted mass Lattice QCD
• On the significance of B-decays to the radially excited D
• Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks
• NeutralB-meson mixing from unquenched lattice QCD with domain-wall light quarks and staticbquarks