$B$ Meson Decay Constants $f_{B_c}$, $f_{B_s}$ and $f_B$ from QCD Sum Rules

Abstract

Finite energy QCD sum rules with Legendre polynomial integration kernels are used to determine the heavy meson decay constant $f_{B_c}$, and revisit $f_B$ and $f_{B_s}$. Results exhibit excellent stability in a wide range of values of the integration radius in the complex squared energy plane, and of the order of the Legendre polynomial. Results are $f_{B_c}=528\pm 19$ MeV, $f_B=186\pm 14$ MeV, and $f_{B_s}=222\pm 12$ MeV.

References in corpus (6)

• Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using the Full Data Sample of Belle
• Decay constants of heavy pseudoscalar mesons from QCD sum rules
• Strange quark condensate from QCD sum rules to five loops
• Leptoquark on $P\to {\ell }^{+}\nu$, FCNC and LFV
• A Mixed Tau-Electroproduction Sum Rule for V_us
• Precise Determinations of the Charm and Bottom Quark Masses

Cited by in corpus (18)

• Analysis of the masses and decay constants of the heavy-light mesons with QCD sum rules
• Mesons with Beauty and Charm: New Horizons in Spectroscopy
• Doubly Heavy Tetraquarks in QCD Sum Rules
• $B_c$ mesons and their properties on the light front
• Width of the exotic $X_b(5568)$ state through its strong decay to $B_s^0{\pi }^{+}$
• Decay constants of B-mesons from non-perturbative HQET with two light dynamical quarks
• Search for $B^{+}\to {\mu }^{+}{\nu }_{\mu }$ and $B^{+}\to {\mu }^{+}N$ with inclusive tagging
• Open bottom mesons in hot asymmetric hadronic medium
• Open charm-bottom scalar tetraquarks and their strong decays
• Bottom-strange mesons in hyperonic matter
• Masses and decay constants of the heavy tensor mesons with QCD sum rules
• Open charm-bottom axial-vector tetraquarks and their properties
• Heavy Vector and Axial-Vector Mesons in Hot and Dense Asymmetric Strange Hadronic Matter
• Three-body decays $B\to \varphi (\rho )K\gamma$ in perturbative QCD approach
• The $B_c$ meson and its scalar cousin with the QCD sum rules
• Properties of Bc Mesons and Variational Constraints on their Masses
• Spectra and Decay Properties of Higher Lying $B_C$ Meson States
• Advances in QCD sum rule calculations