Heavy pseudoscalar-meson decay constants with strangeness from the extended nonlocal chiral-quark model

Abstract

We study the weak-decay constants for the heavy pseudoscalar mesons, D, Ds, B, and Bs. For this purpose, we employ the extended nonlocal chiral-quark model (ExNLChQM), motivated by the heavy-quark effective field theory as well as the instanton-vacuum configuration. In addition to the heavy-quark symmetry and the nonlocal interactions between quarks and pseudoscalar mesons in ExNLChQM, a correction for the strange-quark content inside Ds and Bs is also taken into account and found to be crucial to reproduce the empirical values. From those numerical results, we obtain f_{D,Ds,B,Bs}=(207.53, 262.56, 208.13, 262.39) MeV, which are in good agreement with experimental data and other theoretical estimations. Using those numerical results, we compute the CKM matrix elements and the Cabibbo angle, using various mesonic and leptonic heavy-meson decay channels, resulting in (|V_{cd}|,|V_{cs}|,|V_{ub}|,|V_{td}|/|V_{ts}|)=(0.224,0.968,<5.395*10^{-3},0.215) and theta_C=12.36^o which are well compatible with available data.

12 pages, 7 figures, accepted for publication in Mod. Phys. Lett. A

References in corpus (15)

• Axial Resonances in the Open and Hidden Charm Sectors
• Decay constants and radiative decays of heavy mesons in light-front quark model
• Relativistic treatment of the decay constants of light and heavy mesons
• Decay constants of the heavy-light mesons from the field correlator method
• Magnetic susceptibility of the QCD vacuum
• Leading-twist pion and kaon distribution amplitudes in the gauge-invariant nonlocal chiral quark model from the instanton vacuum
• Electromagnetic form factors of the pion and kaon from the instanton vacuum
• Chiral restoration at finite T under the magnetic field with the meson-loop corrections
• Anomalous tensor magnetic moments and form factors of the proton in the self-consistent chiral quark-soliton model
• 1/N_c corrections to the magnetic susceptibility of the QCD vacuum
• Transversity form factors of the pion in chiral quark models
• Charm and bottom production in inclusive double Pomeron exchange in heavy ion collisions at the LHC
• Generalized form factors and spin structures of the kaon
• Extended nonlocal chiral-quark model for the D- and B-meson weak-decay constants
• Heavy and light quarks in the instanton vacuum

Cited by in corpus (1)

• Extended nonlocal chiral-quark model for the heavy-light quark systems