Exploring the threshold behavior and implications on the nature of Y(4260) and $Z_c(3900)$

Abstract

By assuming that Y(4260) either is a $D_1\bar{D}$ molecular state, or has sizeable couplings with $D_0{\bar{D}}^{\ast }$ and $D_1^{\prime }\bar{D}$, we investigate several decay modes of Y(4260). Under the special kinematic configurations, triangle singularity (TS) may occur in the rescattering amplitude, which will significantly change the threshold behavior. Obvious threshold enhancements or narrow cusp structures appear quite naturally without introducing a genuine resonance. We emphasize that the radiative decay modes may be useful for studying $D^{(\ast )}\bar{D}$ $S$-wave scattering.

14 pages, 13 figures, 1 table, references added, to appear in PRD

References in corpus (11)

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Cited by in corpus (73)

• Hadronic molecules
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• Understanding the newly observed heavy pentaquark candidates
• Analysis of the X(3872), Z_c(3900) and Z_c(3885) as axial-vector tetraquark states with QCD sum rules
• Phenomenology of $P_c(4380{)}^{+}$, $P_c(4450{)}^{+}$ and related states
• Possible assignments of the $X(3872)$, $Z_c(3900)$ and $Z_b(10610)$ as axial-vector molecular states
• Production of the X(3872) in charmonia radiative decays
• Observation of $Z_c(3900{)}^0$ in $e^{+}{e}^{-}\to {\pi }^0{\pi }^{0}J/\psi$
• Searching for observable effects induced by anomalous triangle singularities
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{h}_c$ and a neutral charmoniumlike structure $Z_c(4020{)}^0$
• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• Y(4260) and Y(4360) as mixed hadrocharmonium
• Analysis of the $Z(4430)$ as the first radial excitation of the $Z_c(3900)$
• Y(4260): hadronic molecule versus hadro-charmonium interpretation
• Hadronic molecules in B decays
• Search for Z_c^+(3900) in the 1^+- channel on the lattice
• More hidden heavy quarkonium molecules and their discovery decay modes
• The decay width of the $Z_c(3900)$ as an axialvector tetraquark state in solid quark-hadron duality
• Updated Cross Section Measurement of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ and $K_S^0{K}_S^{0}J/\psi$ via Initial State Radiation at Belle
• Triangle singularities in $B^{-}\to K^{-}{\pi }^{-}{D}_{s0}^{+}$ and $B^{-}\to K^{-}{\pi }^{-}{D}_{s1}^{+}$
• Investigating possible decay modes of $Y(4260)$ under the $D_1(2420)\bar{D}+c.c$ molecular state ansatz
• $Z_c(3900)$ as a $D{\bar{D}}^{\ast }$ molecule from the pole counting rule
• Charged charmoniumlike state $Z_c(3900{)}^{\pm }$ via meson photoproduction
• Lowest vector tetraquark states: $Y(4260/4220)$ or $Z_c(4100)$
• How to understand the underlying structures of $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
• $Z_c(3900)/Z_c(3885)$ as a virtual state from $\pi J/\psi -{\bar{D}}^{\ast }D$ interaction
• Suppression of the S-wave production of (3/2)^+ + (1/2)^- heavy meson pairs in e^+e^- annihilation
• Search for exclusive photoproduction of Z${}_c^{\pm }$(3900) at COMPASS
• Axial meson exchange and the $Z_c(3900)$ and $Z_{cs}(3985)$ resonances as heavy hadron molecules
• Vector tetraquark state candidates: $Y(4260/4220)$, $Y(4360/4320)$, $Y(4390)$ and $Y(4660/4630)$
• Visible narrow cusp structure in ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$ enhanced by triangle singularity
• Influence of threshold effects induced by charmed meson rescattering
• Understanding the nature of the heavy pentaquarks and searching for them in pion-induced reactions
• Resolving the puzzling decay patterns of charged $Z_c$ and $Z_b$ states
• Observation of the $Y(4230)$ and evidence for a new vector charmonium-like state $Y(4710)$ in $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$
• Triangle singularities in $B^{-}\to D^{\ast 0}{\pi }^{-}{\pi }^0\eta$ and $B^{-}\to D^{\ast 0}{\pi }^{-}{\pi }^{+}{\pi }^{-}$
• Abnormal isospin violation and $a_0-f_0$ mixing in the $D_s^{+}\to {\pi }^{+}{\pi }^0{a}_0(980)(f_0(980))$ reactions
• The strong decay patterns of $Z_c$ and $Z_b$ states in the relativized quark model
• Observation of $e^{+}{e}^{-}\to K\bar{K}J/\psi$ at center-of-mass energies from 4.189 to 4.600 GeV
• Axialvector tetraquark candidates for the $Z_c(3900)$, $Z_c(4020)$, $Z_c(4430)$, $Z_c(4600)$
• Generating a resonance-like structure in the reaction $B_c\to B_s\pi \pi$
• The role of the triangle singularity in $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ and $pp\to p{K}^{+}\pi \Sigma$ processes
• Two-particle contributions and nonlocal effects in the QCD sum rules for the axialvector tetraquark candidate $Z_c(3900)$
• Hunting for the $X_b$ via hidden bottomonium decays
• Fully Heavy Tetraquark $bb\bar{c}\bar{c}$: Lifetimes and Weak Decays
• Possibility of $T_{c\bar{s}}(2900)$ as the resonance-like structure induced by threshold effects
• Threshold effects as the origin of $Z_{cs}(4000)$, $Z_{cs}(4220)$ and $X(4700)$ observed in $B^{+}\to J/\psi \varphi K^{+}$
• Triangle singularity appearing as an $X(3872)$-like peak in $B\to (J/\psi {\pi }^{+}{\pi }^{-})K\pi$
• Searching for charmoniumlike states with hidden $s\bar{s}$
• Revisiting the pseudoscalar meson and glueball mixing and key issues in the search for pseudscalar glueball state
• Disentangling the role of the $Y(4260)$ in $e^{+}{e}^{-}\to D^{\ast }{\bar{D}}^{\ast }$ and $D_s^{\ast }{\bar{D}}_s^{\ast }$ via line shape studies
• Production of $Z_c(3900$) and $Z_c(4020)$ in $B_c$ decay
• The impact of $S$-wave thresholds $D_{s1}{\bar{D}}_s+c.c.$ and $D_{s0}{\bar{D}}_s^{\ast }+c.c.$ on vector charmonium spectrum
• ${\rm Y}(6S)$ and triangle singularity in $e^{+}{e}^{-}\to B_1(5721)\bar{B}\to Z_b(10610)\pi$
• Exploring the ${\rm Y}(4S,5S,6S)\to h_b(1P)\eta$ hidden-bottom hadronic transitions
• Weak Decays of Doubly-Heavy Tetraquarks $b\bar{c}q\bar{q}$
• Understanding the ${\eta }_c\rho$ decay mode of $Z_c^{(\prime )}$ via the triangle loop mechanism
• Double Exotic States Productions in Pion and Kaon Induced Reactions
• Searching for tetraquark through weak decays of b-baryons
• Studying the $D_{1}D$ molecule in the Bethe-Salpeter equation approach
• Simultaneous description of the $e^{+}{e}^{-}\to J/\psi \pi \pi (K\bar{K})$ processes
• Decay properties of the $Z_c(3900)$ through the Fierz rearrangement
• Radially excited axial mesons and the enigmatic $Z_c$ and $Z_b$ in a coupled-channel model
• Pion-induced production of the $Z_c(3900)$ off a nuclear target
• Study on decays of $Z_c(4020)$ and $Z_c(3900)$ into $h_c+\pi$
• Study on the radiative decays of $h_c$ via intermediate meson loops model
• Charmoniumlike Channels $1^{+}$ with Isospin $1$ from Lattice and Effective Field Theory
• Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$
• Evasion of HSR in the charmless decays of excited $P$-wave charmonia
• The possible $B\pi$ molecular state and its radiative decay
• Three-body strong decays of the $Y(4230)$ via the light-cone QCD sum rules
• Decoding the near-threshold $X_{0,1}(4140)$ and $X_1(4685)$ states via OZI-suppressed coupled-channel scattering