Extracting m_c(M_c) and f_{D_s,B} from the pseudoscalar sum rules

Abstract

I report here on the (first) direct extraction of the running charm quark mass m_c(ν) from the D-meson sum rules, and on the implications of this result for the estimate of the leptonic decay constants f_{D_s}. The outputs: m_c(M_c)=(1.08\pm 0.11) GeV, f_{D}= (1.52\pm 0.16)f_π, f_{D_s}= (1.75\pm 0.18)f_πand f_B=(1.44\pm 0.07)f_πare in good agreement with the existing sum rule results obtained using the pole mass. In particular, the result f_D\approx f_B supports early '87 sum rule results \cite{SNFB}, which indicated a huge 1/m correction to the heavy quark symmetry expectation. This talk is based on the paper hep-ph/9712386 and updates the discussions given there.

Latex2e sources 5 pages including 2 PS figures and 1 Table. Talk given at the QCD 98 Euroconference-Montpellier (2-8th July1998)

Cited by in corpus (19)

• Penguin Enhancement and $B\to K\pi$ decays in perturbative QCD
• f_B and f_B_s from QCD sum rules
• Open Charm and Beauty Chiral Multiplets in QCD
• Heavy-Light Meson Decay Constant from QCD Sum Rules in Three-Loop Approximation
• c,b quark masses and f_D_(s), f_B_(s) decay constants from pseudoscalar sum rules in full QCD to order alpha_s^2
• A fresh look into m_{c,b} and precise f_{D_(s),B_(s)} from heavy-light QCD spectral sum rules
• $X_{0,1}$(2900) and $(D^{-}{K}^{+})$ invariant mass from QCD Laplace sum rules at NLO
• Charm quark mass from QCD sum rules for the charmonium system
• New QCD estimate of the kaon penguin matrix elements and epsilon'/epsilon
• Heavy quark potential in the static limit of QCD
• QCD Duality and the Mass of the Charm Quark
• Doubly heavy baryons Omega_QQ' vs. Xi_QQ' in sum rules of NRQCD
• QCD moment sum rules for Coulomb systems: the charm and bottom quark masses
• Measurement of the Branching Ratio for D_s->tau nu_tau Decays
• Wilson coefficients and four-quark condensates in QCD sum rules for medium modifications of $D$ mesons
• B^0_{d,s} - \bar{B}^0_{d,s} mass-differences from QCD spectral sum rules
• V-A hadronic tau decays : a QCD laboratory
• QCD sum rule analysis of the charmonium system: The charm quark mass
• A Comparative Study of $f_B$ within QCD Sum Rules with Two Typical Correlators up to Next-to-Leading Order