On a precise calculation of (f_{B_s}/f_B) / (f_{D_s}/f_D) and its implications on the interpretation of B - \bar B mixing

Abstract

We observe that quantities like (f_{B_s}/f_B) / (f_{D_s} /f_D) are predicted to be unity both by heavy quark and by light quark flavor symmetries. Hence, the deviation from the symmetry prediction must be simultaneously small in both symmetry breaking parameters, i.e., order of the ratio of light to heavy quarks masses. We estimate the size of the correction. We observe that the ratio of (ΔM/Γ) for B_s - \bar B_s to B - \bar B mixing can be expressed in terms of the measurable ratio f_{D_s} / f_D with good precision. We comment on applications of these ideas to other processes.

arXiv comment7pp, SSCL-Preprint-492

References in corpus (4)

• Chiral Perturbation Theory for $f_{D_S}/f_D$ and $B_{B_S}/B_B$
• Heavy Mesons in Two Dimensions
• Excited Heavy Mesons and Kaon Loops in Chiral Perturbation Theory
• Heavy Hadron Form Factor Relations for $m_c\ne \infty$ and $\bas(m_c)\ne0$

Cited by in corpus (35)

• Exclusive rare B -> K*e+e- decays at low recoil: controlling the long-distance effects
• B, D and K decays
• Extraction of the D^*Dπcoupling from D^* decays
• Decay Constants of Heavy Meson of $0^{-}$ State in Relativistic Salpeter Method
• $|V_{ub}|$ from exclusive $B$ and $D$ decays
• B and D Meson Decay Constants in Lattice QCD
• Chiral and Heavy Quark Symmetry Violation in B Decays
• Decay constants of heavy pseudoscalar mesons from QCD sum rules
• Quenched Chiral Perturbation Theory for Heavy-Light Mesons
• Recent results from lattice calculations
• CP violation and the CKM matrix
• Comment on $V_{ub}$ from Exclusive Semileptonic B and D Decays
• First Measurement of the Form Factors in the Decays D0 to rho- e+ nu_e and D+ to rho0 e+ nu_e
• Chiral corrections and lattice QCD results for fBs/fBd and (Delta ms/Delta md)
• Symmetry-breaking corrections to heavy meson form factor relations
• The decay Bs -> mu+ mu-: updated SUSY constraints and prospects
• Heavy Quark Physics and Lattice QCD
• Ratios of $B$ and $D$ Meson Decay Constants in Relativistic Quark Model
• Heavy Quarks on the Lattice
• Measuring V_ub and probing SUSY with double ratios of purely leptonic decays of B and D mesons
• B -> K^* gamma from D -> K^* l nu
• Charm and Bottom Semileptonic Decays
• B -> K(*) Kbar(*) Decays: A New Method for Measuring the CP Phase α
• Extrapolating SU(3) breaking effects from D to B decays
• Continuity and Semileptonic $B_{(s)}\to D_{(s)}$ Form Factors
• Subleading corrections to the V_ub determination from exclusive B decays
• HQET and Exclusive B Decays
• SU(3) breaking corrections to the $D$, $D^{\ast }$, $B$, and $B^{\ast }$ decay constants
• Comments on CKM elements
• CKM Matrix and Standard-Model CP Violation
• QCD Sum Rules for The Double Ratio $(f_{B_s}/f_{B_d})/(f_{D_s}/f_{D_d})$ in HQET
• Ratios of $B$ and $D$ Meson Decay Constants in Improved Mock Meson Model
• Conference Summary (5th Int. Conf. on Hyperons, Charm, and Beauty Hadrons)
• Charmonium Decay Physics
• Chiral excitations of open-beauty systems