Electromagnetic Structure of the Z_c(3900)

Abstract

The observation of the exotic quarkonium state Z_c(3900) by the BESIII and Belle collaborations supports the concept of hadronic molecules. Charmonium states interpreted as such molecules would be bound states of heavy particles with small binding energies. This motivates their description using an effective theory with contact interactions. In particular, we focus on the electromagnetic structure of the charged state Z_c(3900). Using first experimental results concerning spin and parity, we interpret it as an S-wave molecule and calculate the form factors as well as charge and magnetic radii up to next-to-leading order. We also present first numerical estimations of some of these observables at leading order.

5 pages, 4 figures, final version to appear in Phys. Lett. B

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Cited by in corpus (51)

• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• Nuclear effective field theory: status and perspectives
• Observation of a charged charmoniumlike structure Z_c(4020) and search for the Z_c(3900) in e+e- to pi+pi-h_c
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Production of the X(3872) in charmonia radiative decays
• Observation of $Z_c(3900{)}^0$ in $e^{+}{e}^{-}\to {\pi }^0{\pi }^{0}J/\psi$
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{h}_c$ and a neutral charmoniumlike structure $Z_c(4020{)}^0$
• Prediction of an $I=1$ $D{\bar{D}}^{\ast }$ state and relationship to the claimed $Z_c(3900)$, $Z_c(3885)$
• QCD Sum Rules Approach to the $X,Y$ and $Z$ States
• $Z_c(3900)$: what has been really seen?
• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• Charged Exotic Charmonium States
• Y(4260): hadronic molecule versus hadro-charmonium interpretation
• Strong $Z_c^{+}(3900)\to J/\psi {\pi }^{+};{\eta }_c{\rho }^{+}$ decays in QCD
• Interpreting $Z_c(3900)$ and $Z_c(4025)/Z_c(4020)$ as charged tetraquark states
• Search for Z_c^+(3900) in the 1^+- channel on the lattice
• Hadronic molecules in B decays
• Treating $Z_c(3900)$ and $Z(4430)$ as the ground-state and first radially excited tetraquarks
• Could $Z_c(3900)$ be a $I^G{J}^P=1^{+}{1}^{+}$ $D^{\ast }\bar{D}$ molecular state?
• 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
• Radiative decays of the neutral $Z_c(3900)$
• Selected strong decay modes of Y(4260)
• Hidden-charmonium decays of $Z_c(3900)$ and $Z_c(4025)$ in intermediate meson loops model
• Production of charged heavy quarkonium-like states at the LHC and the Tevatron
• $Z_c(3900)$ as a $D{\bar{D}}^{\ast }$ molecule from the pole counting rule
• Charged charmoniumlike state $Z_c(3900{)}^{\pm }$ via meson photoproduction
• $Z_c(3900)/Z_c(3885)$ as a virtual state from $\pi J/\psi -{\bar{D}}^{\ast }D$ interaction
• A combined analysis of the $Z_c(3900)$ and the $Z_{cs}(3985)$ exotic states
• Magnetic and quadrupole moments of the $Z_c(3900)$
• $Z_c(3900)$: Confronting theory and lattice simulations
• Possible $B^{(\ast )}\bar{K}$ hadronic molecule state
• Revisiting $X(3872)\to D^0{\bar{D}}^0{\pi }^0$ in XEFT
• Probing the nature of $Y(4260)$ and $Z_c(3900)$ in the isospin violating process $Y(4260)\to J/\psi \eta {\pi }^0$
• Precise determination of the pole position of the exotic $Z_c(3900)$
• Understanding the ${\eta }_c\rho$ decay mode of $Z_c^{(\prime )}$ via the triangle loop mechanism
• Searching for tetraquark through weak decays of b-baryons
• Decay properties of the $Z_c(3900)$ through the Fierz rearrangement
• Identifying Hadronic Molecular States with a Neural Network
• Pion-induced production of the $Z_c(3900)$ off a nuclear target
• Isospin analysis of $B\to D^{\ast }\bar{D}K$ and the absence of the $Z_c(3900)$ in $B$ decays
• Study on decays of $Z_c(4020)$ and $Z_c(3900)$ into $h_c+\pi$
• $Z_c$ and $Z_{cs}$ systems with operator mixing at NLO in QCD sum rules
• Charmoniumlike Channels $1^{+}$ with Isospin $1$ from Lattice and Effective Field Theory
• Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$
• The possible $B\pi$ molecular state and its radiative decay
• Interaction of exotic states in a hadronic medium: the $Z_c(3900)$ case
• $Z_c(3900)$ in a hadronic molecule and a triangle singularity approach at finite temperature
• Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure
• Partial Wave Analysis of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}J/\psi$ and Cross Section Measurement of $e^{+}{e}^{-}\to {\pi }^{\pm }{Z}_c(3900{)}^{\mp }$ from 4.1271 to 4.3583 GeV
• X, Y and Z States