Issues and Opportunities in Exotic Hadrons

Abstract

The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks, pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.

White paper from INT workshop, "Modern Exotic Hadrons". References added. Version to appear in Chinese Physics C

Cited by in corpus (58)

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• ${\chi }_{c0}^{}(3915)$ As the Lightest $c\bar{c}s\bar{s}$ State
• Few-body quark dynamics for doubly-heavy baryons and tetraquarks
• Interpreting the $X(5568)$
• Cross section measurements of $e^{+}{e}^{-}\to \omega {\chi }_{c0}$ from $\sqrt{s}=$4.178 to 4.278 GeV
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• Deciphering the nature of X(3872) in heavy ion collisions
• Spectroscopy, lifetime and decay modes of the $T_{bb}^{-}$ tetraquark
• XYZ-like Spectra from Laplace Sum Rule at N2LO in the Chiral Limit
• Form factors of two-hadron states from a covariant finite-volume formalism
• Charmed mesons with a symmetry-preserving contact interaction
• Measurement of the cross section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and observation of an excited $\Xi$ baryon
• Effective field theory for the nucleon-quarkonium interaction
• Strong couplings and form factors of charmed mesons in holographic QCD
• Very heavy flavored dibaryons
• Model Selection for Pion Photoproduction
• Production of exotic tetraquarks $QQ\bar{q}\bar{q}$ in heavy-ion collisions at the LHC
• Measurement of the cross section for $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ and evidence of the decay $\psi (3770)\to \Lambda \bar{\Lambda }$
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• Observation of the $Y(4230)$ and evidence for a new vector charmonium-like state $Y(4710)$ in $e^{+}{e}^{-}\to K_S^0{K}_S^{0}J/\psi$
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Lattice QCD static potentials of the meson-meson and tetraquark systems computed with both quenched and full QCD
• Quarkonium $h$ States As Arbiters of Exoticity
• Production of charmed baryons in $\bar{p}p$ collisions close to their thresholds
• Measurement of the cross section of $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ at center-of-mass energies between 3.510 and 4.843 GeV
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• Charmed baryon$-$nucleon interaction
• $T_{bbb}$: a three $B-$meson bound state
• How tetraquarks can generate a second chiral phase transition
• Hidden-flavor pentaquarks
• XYZ States: Theory Overview
• Measurement of Born cross section of $e^{+}{e}^{-}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ at center-of-mass energies between 3.510 and 4.951 GeV
• Charmed baryons in nuclear matter
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• Charming quasi-exotic open-flavor mesons
• Charmed mesons at finite temperature and chemical potential
• Quasi-exotic open-flavor mesons
• Production of pentaquarks in $pA$-collisions
• On coupled-channel dynamics in the presence of anomalous thresholds
• Measurement of Born cross sections of $e^{+}{e}^{-}\to {\Xi }^0{\bar{\Xi }}^0$ and search for charmonium(-like) states at $\sqrt{s}$ = 3.51-4.95 GeV
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• Hidden and open heavy-flavor hadronic states
• Study of $e^{+}{e}^{-}\to {\pi }^{0}X(3872)\gamma$ and search for $Z_c(4020{)}^0\to X(3872)\gamma$
• Measurement of Born cross section of $e^{+}{e}^{-}\to {\Sigma }^0{\bar{\Sigma }}^0$ at $\sqrt{s}=3.50-4.95$ GeV
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• Nonmesonic weak decay of charmed hypernuclei
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• Search for Charmonium(-like) states decaying into the ${\Omega }^{-}{\bar{\Omega }}^{+}$ final states
• Measurement of the Born cross section for $e^{+}{e}^{-}\to p{K}^{-}{K}^{-}{\bar{\Xi }}^{+}$ at $\sqrt{s}=$ 3.5-4.9 GeV
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• The Joint Physics Analysis Center: Recent results