arXiv subjects

Hui-feng Fu

Publications and source records attributed to Hui-feng Fu.

4 recordsLinked to original sources

arXiv2019

Coupled-Channel-Induced $S-D$ mixing of Charmonia and Testing Possible Assignments for $Y(4260)$ and $Y(4360)$

The mass spectrum and the two-body open-charm decays of the $J^{PC}=1^{--}$ charmonium states are studied with the coupled-channel effects taken into account. The coupled-channel-induced mixing effects among the excited vector charmonia are studied. Based on our calculations of the masses and the decay widths, we find that the tension between the observed properties of $Y(4260)/Y(4360)$ and their conventional charmonia interpretations could be softened.

hep-ph↗

arXiv2012

Estimating Form Factors of $B_s\rightarrow D_s^{(*)}$ and their Applications to Semi-leptonic and Non-leptonic Decays

$B_s^0\rightarrow D_s^{-}$ and $B_s^0\rightarrow D_s^{*-}$ weak transition form factors are estimated for the whole physical region with a method based on an instantaneous approximated Mandelstam formulation of transition matrix elements and the instantaneous Bethe-Salpeter equation. We apply the estimated form factors to branching ratios, CP asymmetries and polarization fractions of non-leptonic decays within the factorization approximation. And we study the non-factorizable effects and annihilation contributions with the perturbative QCD approach. The branching ratios of semi-leptonic $B_s^0\rightarrow D_s^{(*)-}l^+ν_l$ decays are also evaluated. We show that the calculated decay rates agree well with the available experimental data. The longitudinal polarization fraction of $B_s\rightarrow D_s^*V(A)$ decays are $\sim0.8$ when $V(A)$ denotes a light meson, and are $\sim0.5$ when $V(A)$ denotes a $D_q$ ($q=d,s$) meson.

hep-ph↗

arXiv2011

Probing Non-leptonic Two-body Decays of $B_c$ meson

Rates and CP asymmetries of the non-leptonic two-body decay of $B_c$ are calculated based on the low energy effective Hamiltonian. We concentrate on such $b$ quark decays of the processes with $0^-$ and $1^-$ S-wave particles and/or $0^+$ and $1^+$ P-wave particles in the final states. The Salpeter method, which is the relativistic instantaneous approximation of the original Bethe-Salpeter equation, is used to derive hadron transition matrix elements. Based on the calculation, it is found that the best decay channels to observe CP violation are $B_c^-\rightarrow η_c +D^-(D^{*-}_0)$, which need about $\sim10^7$ $B_c$ events in experiment. Decays to $ η_c +D^{*-}(D_s^-), h_c+D^-(D^{*-})(D^{*-}_0), J/Ψ+D^{*-}$ are also hopeful channels.

hep-ph↗

arXiv2010

Annihilation Rates of Heavy $1^{--}$ S-wave Quarkonia in Salpeter Method

The annihilation rates of vector $1^{--}$ charmonium and bottomonium $^3S_1$ states $V \rightarrow e^+e^-$ and $V\rightarrow 3γ$, $V \rightarrow γgg$ and $V \rightarrow 3g$ are estimated in the relativistic Salpeter method. We obtained $Γ(J/ψ\rightarrow 3γ)=6.8\times 10^{-4}$ keV, $Γ(ψ(2S)\rightarrow 3γ)=2.5\times 10^{-4}$ keV, $Γ(ψ(3S)\rightarrow 3γ)=1.7\times 10^{-4}$ keV, $Γ(Υ(1S)\rightarrow 3γ)=1.5\times 10^{-5}$ keV, $Γ(Υ(2S)\rightarrow 3γ)=5.7\times 10^{-6}$ keV, $Γ(Υ(3S)\rightarrow 3γ)=3.5\times 10^{-6}$ keV and $Γ(Υ(4S)\rightarrow 3γ)=2.6\times 10^{-6}$ keV. In our calculations, special attention is paid to the relativistic correction, which is important and can not be ignored for excited $2S$, $3S$ and higher excited states.

hep-ph↗