arXiv subjects

Ming-Qiu Huang

Publications and source records attributed to Ming-Qiu Huang.

At least 19 recordsLinked to original sources

arXiv2025

Semileptonic decay of double strangeness heavy flavor baryons

This paper investigates the double strangeness heavy flavor baryons $Ω_c^0$ and $Ω_b^-$, which contain two strange quarks. Using QCD light-cone sum rules (LCSRs), we calculate the form factors for the Cabibbo-suppressed processes $Ω_c^0\toΞ^-$ and $Ω_b^-\toΞ^0$, corresponding to the heavy-quark transitions $c\to d$ and $b\to u$, respectively. Combining these with the helicity amplitude formalism for semileptonic decay differential widths, we computed the branching fractions of their corresponding semileptonic decay processes. Our analysis reveals significant discrepancies between two versions of QCD LCSRs: one using the light-cone distribution amplitudes (LCDAs) of the final-state $Ξ$ baryon and the other using the LCDAs of the initial-state double strangeness heavy flavor baryons. The results obtained with the $Ξ$ baryon's LCDAs show excellent agreement with other theoretical calculations. However, when using the LCDAs of the double strangeness heavy flavor baryons, the results differ by orders of magnitude, warranting further investigation.

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arXiv2025

Scalar Triple-Heavy Tetraquark States With Quark Content $cc\bar{c}\bar{s}$

In this paper, we study the scalar triple-heavy tetraquark states with quark content $cc\bar{c}\bar{s}$, $η_{c}D_{s}$ molecular state and $[cc]_{A(T)}[\bar{c}\bar{s}]_{A(T)}$ compact tetraquark states, by the QCD sum rule method. First, we construct the needed interpolating currents, $J^{M}(x)$, $J^{T_{1}}(x)$, and $J^{T_{2}}(x)$. Then, we derive the sum rules for the masses and the current coupling constants. Finally, we numerically analyze these sum rules, and find $m_{M}=4.9392^{+0.0851}_{-0.0817}~\mbox{GeV}$, and $λ_{M}=2.8857^{+0.5729}_{-0.4928}\times10^{-2}~\mbox{GeV}^{5}$ for the mass and the current coupling constant of the $η_{c}D_{s}$ molecular state, $m_{T_{1}}=5.0774^{+0.0708}_{-0.0641}~\mbox{GeV}$, and $λ_{T_{1}}=1.0436^{+0.1862}_{-0.1573}\times10^{-1}~\mbox{GeV}^{5}$ for the mass and the current coupling constant of the $[cc]_{A}[\bar{c}\bar{s}]_{A}$ compact tetraquark state, $m_{T_{2}}=5.0679^{+0.0839}_{-0.0721}~\mbox{GeV}$, and $λ_{T_{2}}=2.0316^{+0.4119}_{-0.3119}\times10^{-1}~\mbox{GeV}^{5}$ for the mass and the current coupling constant of the $[cc]_{T}[\bar{c}\bar{s}]_{T}$ compact tetraquark state.

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arXiv2024

Form factors of $Λ_b^0 \to Λ_c(2595)^+$ within light-cone QCD sum rules

In this work, we calculated the form factors of the weak decay process $Λ_b^0 \to Λ_c(2595)^+$, where the final charm baryon represents an excited state with spin-parity $\frac{1}{2}^-$. Utilizing the light-cone QCD sum rules approach, we incorporated the contributions of the lowest two charm baryon states: the ground state $Λ_c$ with $J^P=\frac{1}{2}^+$ and the excited state $Λ_c(2595)^+$ with $J^P=\frac{1}{2}^-$ in the hadronic representation of the $Λ_b \to Λ_c(2595)^+$ transition correlation function. This approach allows us to extract the form factors of the $Λ_b^0 \to Λ_c(2595)^+$ from $Λ_b^0 \to Λ_c^+$ transition. During the light-cone QCD sum rules procedure, we employed the light-cone distribution amplitudes (LCDAs) of the $Λ_b$ baryon. Furthermore, by combining these form factors with the helicity amplitudes of the bottom baryon transition matrix elements, we calculated the differential decay widths for the processes $Λ_b^0 \to Λ_c(2595)^+\ell^-\barν_\ell$ and provided the optimal choice of the interpolating current for $Λ_c$ in this process. Additionally, within the lifetime of $Λ_b^0$, we obtained the absolute branching fractions for the semileptonic decays $Λ_b^0 \to Λ_c(2595)^+ \ell^- \barν_\ell$. With the branching fractions of $Λ_b^0 \to Λ_c(2595)^+ \ell^- \barν_\ell$ calculated in this work, we also determined the parameter $R(Λ_c(2595)^+)$ which tests the lepton flavor universality. This parameter is defined as the ratio of branching fractions $Br(Λ_b^0 \to Λ_c(2595)^+τ^-\barν_τ)$ and $Br(Λ_b^0 \to Λ_c(2595)^+μ^-\barν_μ)$. Our results provide a valuable theoretical test for these decay channels and offer insights into the LCDAs of bottom baryons, paving the way for further in-depth investigations.

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arXiv2022

Light-cone Sum Rule Analysis of Semileptonic Decays $Λ_b^0 \to Λ_c^+ \ell^- \overlineν_\ell$

In this work, we analyze the semileptonic decay processes of $Λ_b \to Λ_c$ in the light-cone sum rule approach. In order to calculate the form factors of the $Λ_b$ baryon transition matrix element, we use the light-cone distribution amplitudes of $Λ_b$ obtained from the QCD sum rule in the heavy quark effective field theory framework. With the calculation of the six form factors of the $Λ_b \to Λ_c$ transition matrix element, the differential decay widths of $Λ_b^0 \to Λ_c^+ \ell^- \overlineν_\ell (\ell = e, ~μ, ~τ)$ and their absolute branching fractions are obtained. Additionally, the ratio of $R(Λ_c^+) \equiv \mathcal{B}r(Λ_b^0 \to Λ_c^+ τ^- \overlineν_τ)/\mathcal{B}r(Λ_b^0 \to Λ_c^+ μ^- \overlineν_μ)$ is also obtained in this work. Our results are in accord with the newest experimental result and other theoretical calculations and predictions.

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arXiv2022

Semileptonic Decay of $Ξ_c \to Ξ\ell^+ ν_\ell$ From Light-Cone QCD Sum Rules

Semileptonic decay processes of $Ξ_c \to Ξ\ellν_\ell$ are studied by light-cone QCD sum rules in this paper. The six form factors of $Ξ_c \to Ξ$ semileptonic transition matrix elements are calculated by this method with the light-cone distribution amplitudes of $Ξ$ baryon up to twist six. With the six form factors, the absolute branching ratios of $Ξ_c^0 \to Ξ^- \ell^+ ν_\ell$ and $Ξ_c^+ \to Ξ^0 \ell^+ ν_\ell$ are calculated by the helicity amplitudes formalism of semileptonic differential decay widths. The ratios of absolute branching ratios of electron and muon final states processes give the proof of lepton flavor universality. Our results are in accordance with the recent experimental and theoretical reports.

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arXiv2022

P-wave $Ω_{b}$ states: masses and pole residues

In this paper, we consider all P-wave $Ω_{b}$ states represented by interpolating currents with a derivative and calculate the corresponding masses and pole residues with the method of QCD sum rule. Due to the large uncertainties in our calculation compared with the small difference in the masses of the excited $Ω_{b}$ states observed by the LHCb collaboration, it is necessary to study other properties of the P-wave $Ω_{b}$ states represented by the interpolating currents investigated in the present work in order to have a better understanding about the four excited $Ω_{b}$ states observed by the LHCb collaboration.

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arXiv2021

$\bar{D}^{()}_{s}D^{()}$ molecular state with $J^{P}=1^{+}$

In this paper, we construct $\bar{D}^{(*)}_{s}D^{(*)}$-molecule-type interpolating currents $J_{(\pm)μ}(x)$ with $J^{P}=1^{+}$, calculate the corresponding mass and magnetic moment using the QCD sum rule method and its extension in the weak electromagnetic field, and study the processes of $Z_{(\pm)cs}$ to $η_{c}K^{*}$, $J/ψK$, $\bar{D}D^{*}_{s}$, and $\bar{D}^{*}D_{s}$ via three-point sum rules. The numerical values are $m_{Z_{(\pm)cs}}=3.99^{+0.17}_{-0.14}~\mbox{GeV}$, and $λ_{Z_{(\pm)cs}}=2.07^{+0.28}_{-0.16}\times10^{-2}~\mbox{GeV}^{5}$, $μ_{Z_{(\pm)cs}}=0.18^{+0.16}_{-0.09}~μ_{N}$ with $μ_{N}$ the nucleon magneton, $Γ_{Z_{(+)cs}}=17.47^{+12.70}_{-8.08}$, and $Γ_{Z_{(-)cs}}=13.86^{+10.37}_{-6.51}$. The masses are in agreement with the recently measured value of $Z_{cs}(3985)$ by the BESIII Collaboration, $m^{exp}_{Z_{cs}}=(3982.5^{+1.8}_{-2.6}\pm2.1)~\mbox{MeV}$. The widths are compatible with the experimental value, $Γ^{exp}_{Z_{cs}}=(12.8^{+5.3}_{-4.4}\pm3.0)~\mbox{MeV}$. The magnetic moment and the various decay modes can help us to determine the inner structure of $Z_{cs}(3985)$ when being confronted with experimental data in the future.

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arXiv2021

The magnetic moment of $P_{c}(4312)$ as a $\bar{D}Σ_{c}$ molecular state

In this paper, we tentatively assign the $P_{c}(4312)$ to be a $\bar{D}Σ_{c}$ molecular state with quantum number $J^{P}=\frac{1}{2}^{-}$, and calculate its magnetic moment using the QCD sum rule method in external weak electromagnetic field. Starting with the two-point correlation function in external electromagnetic field and expanding it in power of the electromagnetic interaction Hamiltonian, we extract the magnetic moment from the linear response to the external electromagnetic field. The numerical value of the magnetic moment of $P_{c}(4312)$ is $μ_{P_{c}}=1.75^{+0.15}_{-0.11}$.

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arXiv2021

Semileptonic Decay of $Ω_c^0 \to Ξ^- l^+ ν_l$ From Light-Cone Sum Rules

The weak decay process of $Ω_c$ to $Ξ$ is calculated in the method of QCD light-cone sum rule. The decay width of $Ω_c^0 \to Ξ^- l^+ ν_l$ and its decay branching ratio are also calculated with the form factors from this work's calculation. To the twist-6 distribution amplitudes, the form factors $f_1=0.66\pm0.02, f_2=-0.76\pm0.03, g_1=0.06\pm0.01$ and $g_2=-0.44\pm0.01$ are given at zero recoil point. The result of the semileptonic decay width of $Ω_c^0 \to Ξ^-l^+ν_l$ is $Γ=(7.51\pm0.36)\times10^{-15}~{\rm{GeV}}$ , and the prediction of the decay branching ratio $Br(Ω_c^0\toΞ^-l^+ν_l)=(3.06\pm0.15)\times10^{-3}$. These results fit well with other works, and the decay width and branching ratio are improved. This not too small branching ratio gives a good direction to explore this decay channel in the future experiments.

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arXiv2020

The magnetic moment of $Z_{c}(3900)$ as an axial-vector molecular state

In this paper, we tentatively assign $Z_{c}(3900)$ to be an axialvector molecular state, and calculate its magnetic moment using the QCD sum rule method in external weak electromagnetic field. Starting with the two-point correlation function in external electromagnetic field and expanding it in power of the electromagnetic interaction Hamiltonian, we extract the mass and pole residue of $Z_{c}(3900)$ state from the leading term in the expansion and the magnetic moment from the linear response to the external electromagnetic field. The numerical values are $m_{Z_{c}}=3.97\pm0.12\mbox{GeV}$ in agreement with the experimental value $m^{exp}_{Z_{c}}=3899.0\pm3.6\pm4.9\mbox{MeV}$, $λ_{Z_{c}}=2.1\pm0.4\times10^{-2}\mbox{GeV}^{5}$ and $μ_{Z_{c}}=0.19^{+0.04}_{-0.01}μ_{N}$.

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arXiv2020

Partial decay widths of $P_{c}(4312)$ as a $\bar{D}Σ_{c}$ molecular state

In the present work, the partial decay widths of $P_{c}(4312)$ to $η_{c} p$ and $J/ψp$ are investigated with the QCD sum rule method under the assumption that $P_{c}(4312)$ is a $\bar{D}Σ_{c}$ molecular state with $J^{P}=\frac{1}{2}^{-}$. In the analysis, the pole residue of $P_{c}(4312)$, one of the input parameters for the calculations of the strong decay constants, is calculated first. With the numerical values of the strong decay constants, the partial decay widths to $η_{c} p$ and $J/ψp$ are estimated to be $Γ(P_{c}(4312)\rightarrow η_{c} p)=5.54^{+0.75}_{-0.5}\mbox{MeV}$ and $Γ(P_{c}(4312)\rightarrow J/ψp)=1.67^{+0.92}_{-0.56}\mbox{MeV}$, respectively, which are compatible with the measured total width of $P_{c}(4312)$. The results suggest that it is reasonable to assign $P_{c}(4312)$ to be a $\bar{D}Σ_{c}$ molecular state with $J^{P}=\frac{1}{2}^{-}$.

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arXiv2017

Analysis of the semileptonic decay Λ_c->ne^+ν_e

The semileptonic weak decay process of the $Λ_c$ baryon to the neutron $Λ_c\rightarrow ne^+ν_e$ is examined. The transition form factors are investigated with light-cone QCD sum rules. The differential decay width is obtained in the dynamical region by fitting the sum rules-allowed results with the dipole formula. The total decay width and the branching ratio are estimated to be $Γ(Λ_c\rightarrow ne^+ν_e)=(8.57\pm0.41)\times10^{-15}\,\mbox{GeV}$ and $\mbox{Br}(Λ_c\rightarrow ne^+ν_e)=0.26\pm0.01\%$, respectively.

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arXiv2017

Chiral symmetry-breaking corrections to strong decays of D*s0(2317) and D's1(2460) in HH\c{hi}PT

The strong decays of two narrow mesons $D_{s0}^{*}(2317)$ and $D_{s1}^{'}(2460)$ are studied within the framework of heavy hadron chiral perturbation theory. Up to next-to-leading order in $1/Λ_χ$, by a fit to the experimental widths of their nonstrange partners, the chiral symmetry-breaking coupling constants are extracted. The single-pion decay widths are estimated to be $Γ(D_{s0}^{*}(2317)\to D_{s}^{+}π^{0})=9.2\pm2.3$ KeV and $Γ(D_{s1}^{'}(2460)\to D_{s}^{*+}π^{0})=9.0\pm2.1$ KeV, respectively, which are consistent with the experimental constraints and comparable with other theoretical predictions. The numerical analysis shows that chiral-symmetry corrections to the decay widths are significant. Applications and predictions for the corresponding beauty mesons are also provided.

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arXiv2015

$D_{sJ}(2860)$ From The Semileptonic Decays Of $B_s$ Mesons

In the framework of heavy quark effective theory, the leading order Isgur-Wise form factors relevant to semileptonic decays of the ground state $\bar{b}s$ meson $B_{s}$ into orbitally excited $D$-wave $\bar{c}s$ mesons, including the newly observed narrow $D^{*}_{s1}(2860)$ and $D^{*}_{s3}(2860)$ states by the LHCb Collaboration, are calculated with the QCD sum rule method. With these universal form factors, the decay rates and branching ratios are estimated. We find that the decay widths are $Γ(B_s\rightarrow D^{*}_{s1}\ell\barν) =1.25^{+0.80}_{-0.60}\times10^{-19} \mbox{GeV}$, $Γ(B_s\rightarrow D^{'}_{s2}\ell\barν) =1.49^{+0.97}_{-0.73}\times10^{-19} \mbox{GeV}$, $Γ(B_s\rightarrow D_{s2}\ell\barν) =4.48^{+1.05}_{-0.94}\times10^{-17} \mbox{GeV}$, and $Γ(B_s\rightarrow D^{*}_{s3}\ell\barν) = 1.52^{+0.35}_{-0.31}\times10^{-16} \mbox{GeV}$. The corresponding branching ratios are $\mathcal {B}(B_s\rightarrow D^{*}_{s1}\ell\barν) =2.85^{+1.82}_{-1.36}\times 10^{-7}$, $\mathcal {B}(B_s\rightarrow D^{'}_{s2}\ell\barν) =3.40^{+2.21}_{-1.66}\times 10^{-7}$, $\mathcal {B}(B_{s}\rightarrow D_{s2}\ell\barν) =1.02^{+0.24}_{-0.21}\times 10^{-4}$, and $\mathcal {B}(B_s\rightarrow D^{*}_{s3}\ell\barν) = 3.46^{+0.80}_{-0.70}\times 10^{-4}$. The decay widths and branching ratios of corresponding $B^{*}_{s}$ semileptonic processes are also predicted.

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arXiv2015

The temperature dependence of the decuplet baryon masses from thermal QCD sum rules

In the present work, the masses of the decuplet baryons at finite temperature are investigated using thermal QCD sum rules. Making use of the quark propagator at finite temperature, we calculate the spectral functions to $T^{8}$ order, and find that there are no contributions to the spectral functions at $T^{8}$ order and the temperature corrections mainly come from that containing $T^4$ ones. The calculations show very little temperature dependence of the masses below $T=0.11{GeV}$. While above that value, the masses decrease with increasing temperature. The results indicate that the hadron-quark phase transition temperature may be $T_c\geq0.11{GeV}$ for the decuplet bayons.

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arXiv2014

Higher order light-cone distribution amplitudes of the Lambda baryon

The improved light-cone distribution amplitudes (LCDAs) of the $Λ$ baryon are examined on the basis of the QCD conformal partial wave expansion approach. The calculations are carried out to the next-to-leading order of conformal spin accuracy with consideration of twist 6. The next leading order conformal expansion coefficients are related to the nonperturbative parameters defined by the local three quark operator matrix elements with different Lorentz structures with a covariant derivative. The nonperturbative parameters are determined with the QCD sum rule method. The explicit expressions of the LCDAs are provided as the main results.

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arXiv2014

QCD sum rules study of X(4350)

The QCD sum rule approach is used to analyze the nature of the rencently observed new resonance $X(4350)$, which is assumed to be a diquark-antidiquark state $[cs][\bar{c}\bar{s}]$ with $J^{PC}=1^{-+}$. The interpolating current representing this state is proposed. In the calculation, contributions of operators up to dimension six are included in the operator product expansion (OPE), as well as terms which are linear in the strange quark mass $m_s$. We find $m_{1^{-+}}=(4.82\pm 0.19)\,\mbox{GeV}$, which is not compatible with the $X(4350)$ structure as a $1^{-+}$ tetraquark state. Finally, we also discuss the difference of a four-quark state's mass whether the state's interpolating current has a definite charge conjugation.

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arXiv2014

Could $Z_{c}(3900)$ be a $I^{G}J^{P}=1^{+}1^{+}$ $D^{*}\bar{D}$ molecular state?

We investigate the nature of the recently observed narrow resonance $Z_{c}(3900)$, which is assumed to be a $D^{*}\bar{D}$ molecular state with quantum numbers $I^{G}J^{P}=1^{+}1^{+}$. Using QCD sum rules, we consider contributions up to dimension eight in the operator product expansion and work at the leading order in $α_{s}$. The mass we arrived at is $(3.88 \pm 0.17) \mbox{GeV}$, which coincides with the mass of $Z_{c}(3900)$.

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