Exploring possible triangle singularities in the ${\Xi }_b^{-}\to K^{-}J/\psi \Lambda$ decay

Abstract

We analyze possible singularities in the $J/\psi \Lambda$ invariant mass distribution of the ${\Xi }_b^{-}\to K^{-}J/\psi \Lambda$ process via triangle loop diagrams. Triangle singularities in the physical region are found in 18 different triangle loop diagrams. Among those with ${\Xi }^{\ast }$-charmonium-$\Lambda$ intermediate states, the one from the ${\chi }_{c1}\Xi (2120)\Lambda$ loop, which is located around 4628 MeV, is found the most likely to cause observable effects. One needs $S$- and $P$-waves in ${\chi }_{c1}\Lambda$ and $J/\psi \Lambda$ systems, respectively, when the quantum numbers of these systems are $1/2^{+}$ or $3/2^{+}$. When the quantum numbers of the $\Xi (2120)$ are $J^P=1/2^{+}$, $1/2^{-}$ or $3/2^{+}$, the peak structure should be sharper than the other $J^P$ choices. This suggests that although the whole strength is unknown, we should pay attention to the contributions from the ${\Xi }^{\ast }$-charmonium-$\Lambda$ triangle diagram if structures are observed in the $J/\psi \Lambda$ invariant mass spectrum experimentally. In addition, a few triangle diagrams with the $D_{s1}^{\ast }(2700)$ as one of the intermediate particles can also produce singularities in the $J/\psi \Lambda$ distribution, but at higher energies above 4.9 GeV.

References in corpus (31)

• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Threshold cusps and triangle singularities in hadronic reactions
• Decoding the riddle of Y(4260) and $Z_c(3900)$
• Towards exotic hidden-charm pentaquarks in QCD
• Understanding the newly observed heavy pentaquark candidates
• $\bar{D}{\Sigma }_c^{\ast }$ and ${\bar{D}}^{\ast }{\Sigma }_c$ interactions and the LHCb hidden-charmed pentaquarks
• Observation of a new D_sJ meson in B+->D0BD0K+ decays
• The puzzle of anomalously large isospin violations in $\eta (1405/1475)\to 3\pi$
• Searching for observable effects induced by anomalous triangle singularities
• Prediction of hidden charm strange molecular baryon states with heavy quark spin symmetry
• Observation of overlapping spin-1 and spin-3 ${\bar{D}}^0{K}^{-}$ resonances at mass $2.86\mathrm{GeV}/c^2$
• Amplitude analysis and the nature of the Zc(3900)
• Remarks on the $P_c$ structures and triangle singularities
• Possible strange hidden-charm pentaquarks from ${\Sigma }_c^{(\ast )}{\bar{D}}_s^{\ast }$ and ${\Xi }_c^{{(}^{\prime },\ast )}{\bar{D}}^{\ast }$ interactions
• Decays of $P_c$ into $J/\psi N$ and ${\eta }_{c}N$ with heavy quark spin symmetry
• Novel Method for Precisely Measuring the $X(3872)$ Mass
• A hidden-charm $S=-1$ pentaquark from the decay of ${\Lambda }_b$ into $J/\psi \eta \Lambda$
• QCD sum rule study of hidden-charm pentaquarks
• Dalitz plot distributions in presence of triangle singularities
• Triangle singularities in $B^{-}\to K^{-}{\pi }^{-}{D}_{s0}^{+}$ and $B^{-}\to K^{-}{\pi }^{-}{D}_{s1}^{+}$
• Dalitz plot analyses of $B^0\to D^{-}{D}^0{K}^{+}$ and $B^{+}\to {\overline{D}}^0{D}^0{K}^{+}$ decays
• Triangle singularity in the $J/\psi \to K^{+}{K}^{-}{f}_0(980)(a_0(980))$ decays
• Triangular singularity and a possible $\varphi p$ resonance in the ${\Lambda }_c^{+}\to {\pi }^0\varphi p$ decay
• Triangle singularities in $B^{-}\to D^{\ast 0}{\pi }^{-}{\pi }^0\eta$ and $B^{-}\to D^{\ast 0}{\pi }^{-}{\pi }^{+}{\pi }^{-}$
• Triangle singularity enhancing isospin violation in ${\bar{B}}_s^0\to J/\psi {\pi }^0{f}_0(980)$
• Charm-meson Triangle Singularity in $e^{+}{e}^{-}$ Annihilation into $D^{\ast 0}{\bar{D}}^0+\gamma$
• Observation of the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Triangle singularity in $B^{-}\to K^{-}X(3872);X\to {\pi }^0{\pi }^{+}{\pi }^{-}$ and the X(3872) mass
• Revisiting hidden-charm pentaquarks from QCD sum rules

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• What can we learn from the electromagnetic properties of hidden-charm molecular pentaquarks with single strangeness?
• Strong decays of the newly $P_{cs}(4459)$ as a strange hidden-charm ${\Xi }_c{\bar{D}}^{\ast }$ molecule
• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Investigation of magnetic moment of $P_{cs}(4338)$ and $P_{cs}(4459)$ pentaquark states
• Production of $P_{cs}(4459)$ from ${\Xi }_b$ decay
• Prediction of hidden-charm pentaquarks with double strangeness
• Hidden-charm pentaquarks with triple strangeness due to the ${\Omega }_c^{(\ast )}{\bar{D}}_s^{(\ast )}$ interactions
• Implications of the $Z_{cs}(3985)$ and $Z_{cs}(4000)$ as two different states
• Predicting the ${\bar{D}}_s^{(\ast )}{D}_s^{(\ast )}$ bound states as the partners of $X(3872)$
• Mass behavior of hidden-charm pentaquarks with open-strange inspired by these established $P_c$ molecular states
• Exploring the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}_s^{\ast }$ and ${\Omega }_c^{(\ast )}{\bar{D}}_s^{\ast }$ molecular states
• Surveying the mass spectra and the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{D}^{(\ast )}$ molecular pentaquarks
• The resonances $X(4140)$, $X(4160)$, and $P_{cs}(4459)$ in the decay of ${\Lambda }_b\to J/\psi \Lambda \varphi$
• Higher molecular $P_{\psi s}^{\Lambda /\Sigma }$ pentaquarks arising from the ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}_1/{\Xi }_c^{(\prime ,\ast )}{\bar{D}}_2^{\ast }$ interactions
• Double Exotic States Productions in Pion and Kaon Induced Reactions
• Detecting the pure triangle sigularity effect through the $\psi (2S)\to p\bar{p}\eta /p\bar{p}{\pi }^0$ process
• The role of triangle singularity in isospin breaking process $J/\psi \to \Lambda \bar{\Lambda }\pi$ and the possible evidence of ${\Sigma }^{\ast }({\frac{1}{2}}^{-})$ states
• Special Issue on Advances in Chiral Quark Models
• Box Singularity Conditions in Box Diagrams of Decay Processes