Charmonium resonances in the 3.9 GeV/$c^2$ energy region and the $X(3915)/X(3930)$ puzzle

@article{Ortega2017CharmoniumRI,
  title={Charmonium resonances in the 3.9 GeV/\$c^2\$ energy region and the \$X(3915)/X(3930)\$ puzzle},
  author={Pablo G. Ortega and Jorge Segovia and David R. Entem and Francisco M. Fern'andez},
  journal={Physics Letters B},
  year={2017},
  volume={778},
  pages={1-5}
}
40 Citations

Tables from this paper

The nature of the $X(3915)/X(3930)$ resonances from a coupled-channels approach

The positive parity $\chi_{cJ}(2P)$ charmonium states are expected to lie around the 3.9 GeV/$c^2$ energy region, according to the predictions of quark models. However, a plethora of states with

Strong decays of higher charmonium states into open-charm meson pairs

The open-charm strong decays of higher charmonium states up to the mass of the 6P multiplet are systematically studied in the P03 model. The wave functions of the initial charmonium states are

Bottomoniumlike tetraquarks in a chiral quark model

The low-lying bottomonium-like tetraquarks b ¯ bq ¯ q ( q = u, d, s ) with spin-parity J P = 0 + , 1 + and 2 + , and isospin I = 0 , 1 or 12 , are systematically investigated within the theoretical

Diabatic description of charmoniumlike mesons. II. Mass corrections and strong decay widths

From a diabatic bound state approach to $J^{PC}=1^{--}$ and $(0,1,2)^{++}$ charmoniumlike resonances below $4.1$ GeV, formulated in terms of ${c\overline{c}}$ and closed meson-meson channels, we

Doubly charmed pentaquarks

The LHCb collaboration, using its full data set from runs 1 and 2, announced in 2019 a surprising update of the hidden-charm pentaquark states Pc(4380)+ and Pc(4450)+, observed in 2015. A new state,

Light-meson masses in an unquenched quark model

We perform a coupled-channels calculation of the masses of light mesons with the quantum numbers $IJ^{P=-}$, $(I,J)=0,1$, by including $q\bar{q}$ and $(q\bar{q})^2$ components in a nonrelativistic

X(3872) in an unquenched quark model

In this paper, we calculate mass and probability fractions of meson-meson components of $X(3872)$ in an unquenched quark model. Different from most of other unquenched quark models, the quark pairs

Multiquark States

Why do we see certain types of strongly interacting elementary particles and not others? This question was posed more than 50 years ago in the context of the quark model. M. Gell-Mann and G. Zweig

References

SHOWING 1-10 OF 37 REFERENCES

Observation of the chi(c2)(2P) meson in the reaction gamma gamma -> D(D)over-bar at BABAR

A search for the Z(3930) resonance in gamma gamma production of the D (D) over bar system has been performed using a data sample corresponding to an integrated luminosity of 384 fb(-1) recorded by

Observation of a new charmonium state in double charmonium production in e+ e- annihilation at s**(1/2) ~ 10.6-GeV

We report the first observation of a new charmonium state at a mass of $(3.943 \pm 0.006 \pm 0.006) {GeV}/c^2$. This state, called X(3940), is observed in the process $e^+ e^- \to J/\psi X(3940)$ in

Comprehending heavy charmonia and their decays by hadron loop effects

Abstract.We present that including the hadron loop effects could help us to understand the spectrum of the heavier charmonium-like states and their strong decays simultaneously. By coupling the bare

Study of X(3915)→J/ψω in two-photon collisions

We study the process $\gamma \gamma \to J/\psi \omega$ using a data sample of 519.2 $fb^{-1}$ recorded by the BaBar detector at SLAC at the PEP-II asymmetric-energy $e^+ e^-$ collider at

Molecular structures in the charmonium spectrum: the XYZ puzzle

We study in the framework of a constituent quark model the possible contributions of molecular structures to the XYZ charmonium-like states. We analyze simultaneously the structures and the possible

Constituent Quark Model Description of Charmonium Phenomenology

We review how quark models are able to describe the phenomenology of the charm meson sector. The spectroscopy and decays of charmonium and open charm mesons are described in a particular quark model

Is the X(3915) the chi_{c0}(2P)?

The Particle Data Group has assigned the X(3915) meson, an omega J/psi mass peak seen in B-> omega J/psi decays and in two-photon fusion reactions gamma-gamma->omega J/psi, as the chi_{c0}(2P), the

Radiative decays of the Y(3940), Z(3930), and the X(4160) as dynamically generated resonances

We study the radiative decay properties of the charmonium-like X, Y and Z mesons generated dynamically from vector meson-vector meson interaction in the framework of a unitarized hidden-gauge

Could the X(3915) and the X(3930) Be the Same Tensor State?

Identifying the X(3915) with the X (3930) and abandoning the helicity-2 dominance for this tensor state are helpful for the further understandings of the properties of this state and also of the mysterious "XYZ" charmoniumlike resonances.