arXiv subjects

Yu-Kuo Hsiao

Publications and source records attributed to Yu-Kuo Hsiao.

At least 19 recordsLinked to original sources

arXiv2026

Impact of $N^$ and $Λ^$ resonances on $CP$ violation in $Λ_b^0$ decays

The four-body decay $Λ_b^0\to pK^-π^+π^-$ has led to the first observation of baryonic $CP$ violation. However, the underlying subprocesses $Λ_b^0\to N^* M$ and $Λ_b^0\to Λ^* M$, as well as the roles of excited nucleon ($N^*$) and hyperon ($Λ^*$) resonances, remain largely unexplored. Within the constituent quark model, we identify the relevant resonant states contributing to these underlying two-body transitions, including $N(1535)$, $N(1520)$, $Λ(1670)$, $Λ(1690)$, together with the remaining $1P$-wave baryon states. We obtain the resonant branching fraction ${\cal B}(Λ_b^0\to pK^-π^+π^-) =(30.0^{+2.8+4.0}_{-1.3-3.4}\pm1.8)\times10^{-6}$, while the resulting ${\cal A}_{CP}(Λ_b^0\to pK^-π^+π^-)=(3.18\pm0.11\pm0.13\pm0.11)\%$ provides a natural interpretation of the first observed baryonic $CP$ asymmetry. Our analysis establishes the first comprehensive framework for quantifying the impact of excited baryon resonances in multi-body beauty-baryon decays, with the associated mechanism generally applicable to baryonic $CP$ asymmetries.

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arXiv2026

$CP$ violation in singly Cabibbo suppressed $D\to πa_0(980)$ decays

The singly Cabibbo suppressed (SCS) decays $D\to πa_0$, with $a_0\equiv a_0(980)$, have been measured with the branching-fraction ratios $r^{+/-}_{\rm ex}\equiv {\cal B}(D^0\toπ^- a_0^+)/{\cal B}(D^0\toπ^+ a_0^-)=7.5^{+2.5}_{-0.8}\pm 1.7$ and $r^{+/0}_{\rm ex}\equiv {\cal B}(D^+\toπ^0 a_0^+)/{\cal B}(D^+\toπ^+ a_0^0)=2.6\pm 0.6\pm 0.3$, deviating significantly from the short-distance expectations $(r^{+/-},r^{+/0})\simeq (0.07,0.2)$. This discrepancy indicates the necessity of long-distance rescattering effects. In particular, the process $D\to K^*K\to a_0π$ generates ${\cal M}_s$ comparable in magnitude to ${\cal M}_d$ in the amplitude ${\cal M}=λ_d{\cal M}_d+λ_s{\cal M}_s$, with $λ_q\equiv V_{cq}^*V_{uq}$, accompanied by nontrivial strong phases essential for $CP$ violation. Consequently, the direct $CP$ asymmetries naturally arise at the ${\cal O}(10^{-3})$ level, for example, ${\cal A}_{CP}(D^0\toπ^- a_0^+)=(-0.7\pm 0.1\pm 0.1\pm 0.1)\times 10^{-3}$, ${\cal A}_{CP}(D^+\toπ^0 a_0^+)=(-1.4\pm 0.1\pm 0.1\pm 0.1)\times 10^{-3}$, and ${\cal A}_{CP}(D^0\toπ^+ a_0^-)=(-2.1\pm 0.9\pm 1.1\pm 0.4)\times 10^{-3}$. These results establish SCS $D\to πa_0$ decays as a new avenue for probing $CP$ violation.

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arXiv2026

Investigating $Ω_c$ spectroscopy in two-body $Ω_b$ decays

We investigate the $1S$-, $1P$-, $2S$-, and $1D$-wave $Ω_c(css)$ spectroscopy through the non-leptonic decays of $Ω_b^-$ baryon within the constituent quark model. For the lowest-lying $1S$-wave $Ω_c$ state, we obtain the branching fractions ${\cal B}(Ω_b^- \to Ω_c^0 π^-,Ω_c^0 ρ^-)=(1.2,6.3) \times 10^{-3}$, which are consistent with existing model predictions. For $Ω_c(3000)$, $Ω_c(3050)$, $Ω_c(3065)$, and $Ω_c(3090)$, observed in the proton-proton and $e^+ e^-$ collisions and interpreted as members of the $1P$-wave multiplet (collectively denoted as $Ω_c^{**}$), we predict the branching fractions of $Ω_b^-\toΩ_c^{**}π^-,Ω_c^{**}ρ^-$ at the level of $10^{-3}$. Assigning the newly observed $Ω_c(3327)$ baryon to a $1D$-wave excitation with $J^P=5/2^+$ or $7/2^+$, we obtain ${\cal B}[Ω_b^-\to Ω_c(3327)^0π^-,Ω_c(3327)^0ρ^-] =(2.0,5.7)\times 10^{-3}$ or $(4.6,0.8)\times 10^{-3}$, respectively. The pronounced differences between these two scenarios provide a clear discriminant that can be tested in future measurements at LHCb.

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arXiv2026

Rescattering-induced $D\to SS$ weak decays

We investigate two-body non-leptonic $D\to SS$ weak decays, where $S$ denotes a light scalar meson such as $a_0/a_0(980)$, $f_0/f_0(980)$, or $σ_0/f_0(500)$. Short-distance topologies from $W$-boson emission and annihilation (exchange) are found to be negligible, while long-distance final-state interactions provide the dominant contributions. In particular, triangle rescattering processes, $D \to πη^{(\prime)} \to σ_0 a_0$ and $D \to a_1(1260)η\to σ_0 a_0$, mediated by pion exchange in $πη^{(\prime)}$ and $a_1(1260)η$ scatterings, respectively, are identified as the leading mechanisms. Our calculations yield branching fractions ${\cal B}(D_s^+ \to σ_0 a_0^+) = (1.0 \pm 0.2^{+0.1}_{-0.2}) \times 10^{-2}$, ${\cal B}(D^+ \to σ_0 a_0^+) = (1.1 \pm 0.2^{+0.1}_{-0.2}) \times 10^{-3}$, and ${\cal B}(D^0 \to σ_0 a_0^0) = (0.9 \pm 0.2^{+0.2}_{-0.3}) \times 10^{-5}$. For the Cabibbo-allowed decay mode $D_s^+ \to f_0 a_0^+$, the near-threshold condition $m_{D_s}\simeq m_{f_0}+m_{a_0}$ limits the phase space, suppressing the branching fraction to $(3.4\pm0.3^{+0.4}_{-0.9})\times 10^{-4}$. These results highlight rescattering-induced $D\to SS$ decays as promising channels for experimental studies at BESIII, Belle(-II), and LHCb.

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arXiv2025

Probing the elusive $κ/K_0^*(700)$ resonance in semileptonic $D$ decays

The $κ/K_0^*(700)$ meson remains the most elusive among the light scalar resonances, with its presence in weak decays obscured by limited precision in branching fraction measurements. As a result, the true nature of the $κ$ remains difficult to explore. Through a partial-wave analysis of the semileptonic decay $D^+ \to K^-π^+ e^+ ν_e$, we extract ${\cal B}(D^+ \to \barκ^0 e^+ ν_e, \barκ^0 \to K^-π^+) =(2.2 \pm 0.1) \times 10^{-3}$. Previously considered negligible, this contribution is now shown to dominate the observed s-wave branching fraction. This reveals that clear evidence for the $κ$ in weak decays has long existed, but was misidentified as part of the non-resonant background. The extracted $D^+ \to \barκ^0$ form factor, $f^+(0) = 0.32 \pm 0.01$, is significantly smaller than the $q\bar q$ prediction of $0.82 \pm 0.05$, and closely aligns with the $q^2\bar q^2$ expectation of $0.36 \pm 0.02$. Notably, this finding supports a compact tetraquark interpretation of the $κ$ meson.

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arXiv2025

Excited $Ω$ hyperon in charmful $Ω_b$ weak decays

We investigate the sextet $b$-baryon decay processes $Ω_b\to J/ψΩ^{(*)}$,where $Ω^*$ represents the $1P$-, $1D$- and $2S$-wave excited $Ω$ hyperons in the spectroscopy. Using the constituent quark model, we obtain ${\cal B}(Ω_b \to J/ψΩ)=8.8\times 10^{-4}$, which agrees with the previous studies to the order of magnitude. By identifying $Ω(2012)$ as $Ω(1^2P_{3/2^-})$, ${\cal B}(Ω_b \to J/ψΩ(2012))=1.1\times 10^{-3}$ can be similarly significant. Additionally, $Ω(1^2D_{5/2^+})$ and $Ω(1^4D_{3/2^+},1^4D_{5/2^+})$ states exhibit production rates of 0.5, and (0.6, 0.8), respectively, relative to their ground-state counterpart. Notably, our findings suggest that ${\cal B}(Ω_b\to J/ψΩ(2^2S_{1/2^+},2^4S_{3/2^+}))$ are as large as $(4.5,20)\times 10^{-4}$, making them accessible to experiments at LHCb.

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arXiv2025

Charmful two-body $Ω_b$ decays in the light-front quark model

We investigate the singly and doubly charmful two-body $Ω_b^-$ decays using the light-front quark model. Our findings reveal that most branching fractions calculated in this study, such as ${\cal B}(Ω_b^-\toΞ^- D^0,Ξ^{-}D^{*0})$, can be ten to one hundred times larger than those reported in previous calculations. Additionally, we interpret the ratio ${\cal B}(Ω_b^-\toΩ^- J/ψ)/{\cal B}(Ω_b^-\toΩ^- η_c)\simeq 3.4$ within the helicity framework. While the decay involving external $W$-boson emission appears to be suppressed by the $b\to u \bar c s$ weak transition, it still yields a significant branching fraction. For instance, ${\cal B}(Ω_b^-\toΞ^0 D_s^{*-})=(5.9-14.2)\times 10^{-5}$, ${\cal B}(Ω_b^-\toΞ^{*0}D_s^{-})=(6.7-12.1)\times10^{-5}$, and ${\cal B}(Ω_b^-\toΞ^{*0}D_s^{*-})=(12.8-26.7)\times10^{-5}$, with values reaching as large as $10^{-4}$. These predictions are well within the experimental reach of LHCb.

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arXiv2025

Hidden charm ${\cal P}_{cs}(4338)^0$ production in baryonic $B^-\to J/ψΛ\bar p$ decay

We investigate the resonant baryonic $B$ decay $B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ$, where ${\cal P}_{cs}^0\equiv {\cal P}_{cs}(4338)^0$ is identified as a hidden charm pentaquark candidate with strangeness. By interpreting ${\cal P}_{cs}^0$ as the $Ξ_c\bar D$ molecule that strongly decays into $J/ψΛ$ and $η_cΛ$, we discover a dominant triangle rescattering effect for $B^-\to {\cal P}_{cs}^0\bar p$, initiated by $B^-\to J/ψK^-$. Through the exchange of a $\bar Λ$ anti-baryon, $J/ψ$ and $K^-$ undergo rescattering, transforming into ${\cal P}_{cs}^0$ and $\bar p$, respectively. Based on this rescattering mechanism, we calculate ${\cal B}(B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ) =(1.4^{+2.1}_{-1.1})\times10^{-6}$, which is consistent with the measured data.

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arXiv2025

Testing the light scalar meson as a non-$q\bar q$ state in semileptonic $D$ decays

While the light scalar mesons ($S_0$) are considered to be either ordinary $q\bar q$ or exotic tetraquark states, we investigate the semileptonic decays $D\to S_0 e^+ν_e$, by taking into account the resonant effects of $S_0\to M_1 M_2$, where $S_0=a_0(980)$, $f_0(980)$, and $f_0(500)/σ_0$, and $M_{1(2)}$ represents a pseudoscalar meson. For the first time, the $D\to S_0$ form factors in the two quark structures are both presented. Subsequently, we calculate ${\cal B}(D_s^+\to σ_0 e^+ν_e,σ_0\toπ^+π^-)=(20.3\pm 1.8\pm 0.5)\times 10^{-4}$ in the $q\bar q$ structure, showing significant $9σ$ deviations from the experimental upper limit of $3.3\times 10^{-4}$. In contrast, ${\cal B}(D_s^+\to σ_0 e^+ν_e,σ_0\toπ^+π^-)=(0.58^{+1.43}_{-0.57}\pm 0.01)\times 10^{-4}$ in the $q^2\bar q^2$ structure is within the allowed experimental range. Clearly, the light scalar meson is tested as a non-$q\bar q$ state. We hence demonstrate a highly sensitive new approach for exploring the true nature of scalar mesons, which can be extended to non-leptonic $D$ decays as well as $B$ meson decays.

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arXiv2024

Study of two-body doubly charmful baryonic $B$ decays with $SU(3)$ flavor symmetry

Within the framework of $SU(3)$ flavor symmetry, we investigate two-body doubly charmful baryonic $B\to{\bf B}_c\bar{\bf B}'_c$ decays, where ${\bf B}_c\bar{\bf B}'_c$ represents the anti-triplet charmed dibaryon. We determine the $SU(3)_f$ amplitudes and calculate ${\cal B}(B^-\to Ξ_c^0\bar Ξ_c^-)=(3.4^{+1.0}_{-0.9})\times 10^{-5}$ and ${\cal B}(\bar B^0_s\to Λ_c^+\bar Ξ_c^-)=(3.9^{+1.2}_{-1.0})\times 10^{-5}$ induced by the single $W$-emission configuration. We find that the $W$-exchange amplitude, previously neglected in studies, needs to be taken into account. It can cause a destructive interfering effect with the $W$-emission amplitude, alleviating the significant discrepancy between the theoretical estimation and experimental data for ${\cal B}(\bar B^0\toΛ_c^+\barΛ_c^-)$. To test other interfering decay channels, we calculate ${\cal B}(\bar B^0_s\to Ξ_c^{0(+)}\bar Ξ_c^{0(+)})=(3.0^{+1.4}_{-1.1})\times 10^{-4}$ and ${\cal B}(\bar B^0\to Ξ_c^0\bar Ξ_c^0)=(1.5^{+0.7}_{-0.6})\times 10^{-5}$. We estimate non-zero branching fractions for the pure $W$-exchange decay channels, specifically ${\cal B}(\bar B^0_s\to Λ_c^+\bar Λ_c^-)=(8.1^{+1.7}_{-1.5})\times 10^{-5}$ and ${\cal B}(\bar B^0\to Ξ_c^+\bar Ξ_c^-)=(3.0\pm 0.6)\times 10^{-6}$. Additionally, we predict ${\cal B}(B^+_c\to Ξ_c^+\bar Ξ_c^0)=(2.8^{+0.9}_{-0.7})\times 10^{-4}$ and ${\cal B}(B^+_c\to Λ_c^+\bar Ξ_c^0)=(1.6^{+0.5}_{-0.4})\times 10^{-5}$, which are accessible to experimental facilities such as LHCb.

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arXiv2023

Four-body baryonic $B\to{\bf B_1\bar B'_1 B_2 \bar B'_2}$ decays

LHCb has recently reported the first observation of a four-body baryonic $B\to{\bf B_1\bar B'_1 B_2\bar B'_2}$ decay, where ${\bf B_1\bar B'_1}$ and ${\bf B_2\bar B'_2}$ represent the two pairs of octet baryon states. In our classification, the measured $\bar B^0\to p\bar p p\bar p$ decay is a tree dominated process via internal $W$-boson emission, whose branching fraction is explained as small as $2.2\times 10^{-8}$. We investigate for the first time the phenomenology of other tree and penguin dominated $B\to{\bf B_1\bar B'_1 B_2\bar B'_2}$ decays, and predict the presence of a double threshold effect, manifested as two peaks around $m_{\bf B_1\bar B'_1}\sim m_{\bf B_1}+m_{\bf\bar B'_1}$ and $m_{\bf B_2\bar B'_2}\sim m_{\bf B_2}+m_{\bf\bar B'_2}$ in the invariant mass spectra of ${\bf B_1\bar B'_1}$ and ${\bf B_2\bar B'_2}$, respectively. Moreover, we predict the following branching fractions: ${\cal B}(B^-\to n\bar p p\bar p)=(1.7^{+0.4}_{-0.2}\pm 0.1^{+0.7}_{-0.4})\times 10^{-7}$, ${\cal B}(B^-\to Λ\bar p p\bar p)=(7.4^{+0.6}_{-0.2}\pm 0.03^{+3.6}_{-2.6})\times 10^{-7}$, and ${\cal B}(\bar B^0_s\to Λ\bar Λp\bar p)=(1.9^{+0.3}_{-0.1}\pm 0.01^{+1.1}_{-0.6})\times 10^{-7}$, which are accessible to experimental facilities.

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arXiv2023

Semileptonic baryonic $B$ decays

We study the semileptonic $B\to{\bf B\bar B'}L\bar L'$ decays with $\bf B\bar B'$ ($L\bar L'$) representing a baryon (lepton) pair. Using the new determination of the $B\to{\bf B\bar B'}$ transition form factors, we obtain ${\cal B}(B^-\to p\bar p μ^-\bar ν_μ) =(5.4\pm 2.0)\times 10^{-6}$ agreeing with the current data. Besides, ${\cal B}(B^-\to Λ\bar p ν\bar ν)=(3.5\pm 1.0)\times 10^{-8}$ is calculated to be 20 times smaller than the previous prediction. In particular, we predict ${\cal B}(\bar B^0_s\to p\bar Λe^- \bar ν_e,p\bar Λμ^- \bar ν_μ,p\bar Λτ^- \bar ν_τ) =(2.1\pm 0.6,2.1\pm 0.6,1.7\pm 1.0)\times 10^{-6}$ and ${\cal B}(\bar B^0_s\to Λ\bar Λν\bar ν)=(0.8\pm 0.2)\times 10^{-8}$, which can be accessible to the LHCb experiment.

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arXiv2022

Angular asymmetries in $B\toΛ\bar p M$ decays

The forward-backward angular asymmetry (${\cal A}_{FB}$) for $\bar B^0\to Λ\bar pπ^+$ measured by Belle has presented an experimental value in the range of $-30\%$ to $-50\%$. In our study, we find that ${\cal A}_{FB}[\bar B^0\toΛ\bar p π^+(B^-\to Λ\bar pπ^0)]$ can be as large as $(-14.6^{+0.9}_{-1.5}\pm 6.9)\%$. In addition, we present ${\cal A}_{FB}[\bar B^0\toΛ\bar p ρ^+(B^-\to Λ\bar pρ^0)] =(4.1^{+2.8}_{-0.7}\pm 2.0)\%$ as the first prediction involving a vector meson in the charmless $B\to{\bf B\bar B'}M$ decays. While ${\cal A}_{FB}(B\toΛ\bar p M)$ indicates an angular correlation caused by the rarely studied baryonic form factors in the timelike region, LHCb and Belle~II are capable of performing experimental examinations.

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arXiv2022

Fragmentation fraction $f_{Ω_b}$ and the $Ω_b\to ΩJ/ψ$ decay in the light-front formalism

One has measured $f_{Ω_b}{\cal B}(Ω_b^-\to Ω^- J/Ψ)$ at the level of $10^{-6}$, where the fragmentation faction $f_{Ω_b}$ is to evaluate the $b$-quark to $Ω_b^-$ production rate. Using the $Ω_b\to Ω$ transition form factors calculated in the light-front quark model, we predict ${\cal B}(Ω_b^-\to Ω^- J/Ψ) =(5.3^{+3.3+3.8}_{-2.1-2.7})\times 10^{-4}$. In particular, we extract $f_{Ω_b}=(0.54^{+0.34+0.39+0.21}_{-0.22-0.28-0.15})\times 10^{-2}$, demonstrating that the $b$ to $Ω_b$ productions are much more difficult than the $b$ to $Λ_b(Ξ_b)$ ones. Since $f_{Ω_b}$ has not been determined experimentally, $f_{Ω_b}$ added to theoretical branching fractions can be compared to future measurements of the $Ω_b$ decays.

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arXiv2022

Baryonic $B$ meson decays

We review the two and three-body baryonic $B$ decays with the dibaryon (${\bf B\bar B'}$) as the final states. Accordingly, we summarize the experimental data of the branching fractions, angular asymmetries, and $CP$ asymmetries. Using the $W$-boson annihilation (exchange) mechanism, the branching fractions of $B\to {\bf B \bf \bar B'}$ are shown to be interpretable. In the approach of perturbative QCD counting rules, we study the three-body decay channels. In particular, we review the $CP$ asymmetries of $B\to {\bf B\bar B'}M$, which are promising to be measured by the LHCb and Belle~II experiments. Finally, we remark the theoretical challenges in interpreting ${\cal B}(B^-\to p\bar pρ^-)$ and ${\cal B}(B^-\to p\bar pμ^-\bar ν_μ)$.

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arXiv2021

Study of the $D_s^+\to a_0(980) ρ$ and $a_0(980) ω$ decays

We study $D_{s}^{+}\toρ^{0(+)}a^{+(0)}_{0}$, $D_{s}^{+}\toωa^{+}_{0}$, and the resonant $D_{s}^{+}\toρa_0$,$a_{0}\to ηπ(KK)$ decays. In the final state interaction, where $D_s^+\to (η^{(\prime)}π^+,K^+\bar K^0)$ are followed by the $(η^{(\prime)}π^+,K^+\bar K^0)$ to $ρ^{0(+)}a^{+(0)}_{0}$ rescatterings, we predict ${\cal B}(D_{s}^{+}\toρ^{0(+)}a^{+(0)}_{0})=(3.0\pm 0.3\pm 1.0)\times 10^{-3}$. Due to the cancellation of the rescattering effects and the suppressed short-distance $W$ annihilation contribution, we expect that ${\cal B}(D_{s}^{+}\toωa^{+}_{0}) \simeq {\cal B}(D_s^+\toπ^+π^0)<3.4\times 10^{-4}$. In our calculation, ${\cal B}(D_{s}^{+}\toρ^{0}(a^{+}_{0}\to)ηπ^{+}) =(1.6^{+0.2}_{-0.3}\pm 0.6)\times 10^{-3}$ agrees with the data, whereas ${\cal B}(D_{s}^{+}\toρ^{+}(a^{0}_{0}\to)K^+K^-)$ is 10 times smaller than the observation, which requires a careful examination.

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arXiv2021

Cabibbo-favored $Λ^+_c\toΛa_{0}(980)^+$ decay in the final state interaction

The anti-triplet charmed baryon decays with the light scalar mesons are rarely measured, whereas the recent observation of the Cabibbo-favored $Λ_c^+\to Ληπ^+$ decay hints a possible $Λ_c^+\toΛa_0(980)^+,a_0(980)^+\to ηπ^+$ process. We hence study the $Λ_c^+\toΛa_0(980)^+$ decay. Particularly, it is found that the final state interaction can give a significant contribution, where $Σ^{+}(1385)$ and $η$ in $Λ_c^+\to Σ^{+}(1385)η$ by exchanging a charged pion are transformed as $Λ$ and $a_0(980)^+$, respectively. Accordingly, we predict ${\cal B}(Λ_c^+\toΛa_0(980)^+)=(1.7^{+2.8}_{-1.0}\pm 0.3)\times 10^{-3}$, accessible to the BESIII, BELLEII and LHCb experiments.

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arXiv2021

New $X_{0,1}(2900)$-like exotic states in $b$-baryon decays

In the $B^+\to D^+ D^-K^+$ decay, LHCb has reported the observation of the open-charm exotic states $X_{0,1}^0\equiv X_{0,1}(2900)^0$ with four different quark flavors~$(ud\bar s \bar c)$, where the subscripts (0,1) denote the spins. To confirm the discovery, we propose $Λ_b\to Σ_c^{0(++)} X_{0,1}^{\prime\,0(--)}$ in the final state interaction, where $X_{0,1}^{\prime\,0(--)}$ with $s u\bar d \bar c$ ($ds\bar u \bar c$) are the new $X_{0,1}$-like exotic states. More specifically, $Λ_c^+D_s^-$ in $Λ_b\to Λ_c^+D_s^-$ are transformed as $Σ_c^{0(++)} X_{0,1}^{\prime\,0(--)}$, by exchanging $π^{+(-)}$. As the order of magnitude estimates, we calculate ${\cal B}(Λ_b\to Σ_c^{0(++)} X_{0,1}^{\prime\,0(--)}) =(2.3\pm 0.6,4.3\pm 0.8^{+3.3}_{-2.5})\times 10^{-4}$. In addition, we estimate other $b$-baryon decays with the $X_{0,1}$-like states, such as ${\cal B}(Ξ_{b}^{0(-)}\to Ξ_{c}^{0(+)}(2645)X_{0}^{\prime\,0(--)}, Λ_{b}\to Ξ_{c}^{\prime\,0}X_{0,1}^{0})\sim 10^{-5}$. While one needs $Λ_b\to Σ_c^{0(++)}M_c M$ to observe $X_{0,1}^{\prime\,0(--)}\to M_c M$ with $M_c M=D_s^-π^+$, $\bar D^0 \bar K^0$ $(D_s^-π^-$, $D^-K^-)$, ${\cal B}(Λ_b\to Σ_c^{0(++)} X_{0,1}^{\prime\,0(--)}, X_{0,1}^{\prime\,0(--)}\to M_c M)\sim 10^{-4}$ are accessible to the LHCb experiment.

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