Pseudoscalar Decay Constants $f_D$ and $f_{D_s}$ in Lattice QCD with Exact Chiral Symmetry

Abstract

We determine the masses and decay constants of pseudoscalar mesons $D$, $D_s$, and $K$ in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with single-plaquette action at $\beta =6.1$ on the $20^3\times 40$ lattice, we compute point-to-point quark propagators for 30 quark masses in the range $0.03\le m_{q}a\le 0.80$, and measure the time-correlation functions of pseudoscalar and vector mesons. The inverse lattice spacing $a^{-1}$ is determined with the experimental input of $f_{\pi }$, while the strange quark bare mass $m_{s}a=0.08$, and the charm quark bare mass $m_{c}a=0.80$ are fixed such that the masses of the corresponding vector mesons are in good agreement with $\varphi (1020)$ and $J/\psi (3097)$ respectively. Our results of pseudoscalar-meson decay constants are $f_K=152(6)(10)$ MeV, $f_D=235(8)(14)$ MeV, and $f_{D_s}=266(10)(18)$ MeV.

14 pages, 6 eps figures

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measuring cal B(D^+ --> mu^+ nu) and the Pseudoscalar Decay Constant f_D^+
• Direct Measurement of the Pseudoscalar Decay Constant fD+
• Leptonic decay constants f_Ds and f_D in three flavor lattice QCD

Cited by in corpus (30)

• Exclusive semileptonic and nonleptonic decays of the Bc meson
• Improved Measurement of cal{B}(D^+ --> mu^+ nu) and the Pseudoscalar Decay Constant f_{D^+}
• Charm Meson Decays
• B, D and K decays
• Precision Measurement of B(D+ -> mu+ nu) and the Pseudoscalar Decay Constant fD+
• Relativistic treatment of the decay constants of light and heavy mesons
• Revising Limits on Neutrino-Majoron Couplings
• Measurement of B(Ds+ -->ell+ nu) and the Decay Constant fDs From 600/pb of e+e- Annihilation Data Near 4170 MeV
• Semileptonic $B_c$ decays and Charmonium distribution amplitude
• Beauty mesons in lattice QCD with exact chiral symmetry
• Decay constants of the heavy-light mesons from the field correlator method
• The transition form factors for semi-leptonic weak decays of $J/\psi$ in QCD sum rules
• Y(4260) on the lattice
• Measurement of the Decay Constant $f_D{}_S^{+}$ using $D_S^+ --> ell^+ nu
• X(3872) in lattice QCD with exact chiral symmetry
• Determination of the pseudoscalar decay constant $f_{D_s^{+}}$ via $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$
• Decay Constants of Pseudoscalar $D$-mesons in Lattice QCD with Domain-Wall Fermion
• Measurement of B(D_S^+ --> ell^+ nu) and the Decay Constant f_D_{S^+}
• Light hadron and diquark spectroscopy in quenched QCD with overlap quarks on a large lattice
• Semileptonic decays of $B_c$ mesons into charmonium states
• Decay constants of charm and beauty pseudoscalar heavy-light mesons on fine lattices
• Pseudovector meson with strangeness and closed-charm
• Strategies for an accurate determination of the X(3872) energy from QCD lattice simulations
• SU(3) symmetry breaking in decay constants and electromagnetic properties of pseudoscalar heavy mesons
• Spectroscopic parameters and electromagnetic form factor of kaon in vacuum and a dense medium
• Exclusive $D\bar{D}$ meson pair production in peripheral ultrarelativistic heavy ion collisions
• Charm Leptonic and Semileptonic Decays
• A possible signature of new physics at BES-III
• Role of Resonances in Heavy Meson Processes within Standard Model and Beyond
• Study of meson properties in quark models (Ph.D. Thesis, University of Pittsburgh, October 2006)