${\chi }_{c1}(2p)$: an overshadowed charmoniumlike resonance

Abstract

A thorough study of the $J^{PC}=1^{++}$ elastic $D^0{\bar{D}}^{\ast 0}$ and $D^{+}{D}^{\ast -}$ scattering, where the form of the meson-meson interaction is inferred from lattice QCD calculations of string breaking, is carried out for center-of-mass energies up to 4 GeV. We show that the presence of ${\chi }_{c1}(3872)$, which can be naturally assigned to either a bound or virtual charmoniumlike state close below the $D^0{\bar{D}}^{\ast 0}$ threshold, can overshadow a quasiconventional charmoniumlike resonance lying above threshold. This makes difficult the experimental detection of this resonance through the $D^0{\bar{D}}^{\ast 0}$ and $D^{+}{D}^{\ast -}$ channels, despite being its expected main decay modes. We analyze alternative strong and electromagnetic decay modes. Comparison with existing data shows that this resonance may have already been observed through its decay to $\omega J/\psi$.

arXiv comment23 pages, 12 figures; v2: updated figures, expanded text, new references, updated acknowledgements, additional minor changes; v3: version accepted for publication in JHEP, format change to single column, major additions to sections 2 and 3, section 6 has become section 5 and it has been expanded with a new subsection, one new figure, updated bibliography, other minor modifications

References in corpus (31)

• Hadronic molecules
• The $XYZ$ states: experimental and theoretical status and perspectives
• Higher Charmonia
• QCD forces and heavy quark bound states
• Isospin breaking of the narrow charmonium state of Belle at 3872 MeV as a deuson
• Mesons with Beauty and Charm: Spectroscopy
• Observation of String Breaking in QCD
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Charmonium levels near threshold and the narrow state $X(3872) \to π^{+}π^{-}\jpsi$
• Is the X(3872) Production Cross Section at Tevatron Compatible with a Hadron Molecule Interpretation?
• Is X(3872) a molecule?
• New states above charm threshold
• Hadron Loops: General Theorems and Application to Charmonium
• Interpretation of the X(3872) as a charmonium state plus an extra component due to the coupling to the meson-meson continuum
• Decay channels and charmonium mass-shifts
• Dynamical origin and the pole structure of X(3872)
• J/psi gamma and psi(2S) gamma decay modes of the X(3872)
• String breaking by light and strange quarks in QCD
• Quarkonium Contribution to Meson Molecules
• Effective range expansion for narrow near-threshold resonances
• Channel coupling in heavy quarkonia: energy levels, mixing, widths and new states
• Charmonium resonances in the 3.9 GeV/$c^2$ energy region and the $X(3915)/X(3930)$ puzzle
• From the lineshape of the $X(3872)$ to its structure
• Computation of the quarkonium and meson-meson composition of the ${\rm Y}(nS)$ states and of the new ${\rm Y}(10753)$ Belle resonance from lattice QCD static potentials
• Confinement and parity doubling in heavy-light mesons
• Diabatic description of charmonium-like mesons
• Bottomonium resonances with $I=0$ from lattice QCD correlation functions with static and light quarks
• Modern meson spectroscopy: the fundamental role of unitarity
• Diabatic description of bottomoniumlike mesons
• Radiative decays in charmonium beyond the p/m approximation
• Coupled-channel meson-meson scattering in the diabatic framework

Cited by in corpus (2)

• Probing the structure of ${\chi }_{c1}(3872)$ with photon transition form factors
• Shedding light on charmonium