Diquark-antidiquarks with hidden or open charm and the nature of X(3872)

  title={Diquark-antidiquarks with hidden or open charm and the nature of X(3872)},
  author={L. Maiani and Fulvio Piccinini and Antonio Davide Polosa and Ver{\'o}nica Riquer},
  journal={Physical Review D},
Heavy-light diquarks can be the building blocks of a rich spectrum of states which can accommodate some of the newly observed charmoniumlike resonances not fitting a pure $c\overline{c}$ assignment. We examine this possibility for hidden and open charm diquark-antidiquark states deducing spectra from constituent quark masses and spin-spin interactions. Taking the $X(3872)$ as input we predict the existence of a ${2}^{++}$ state that can be associated to the $X(3940)$ observed by Belle and… 

Figures and Tables from this paper

Can $X(5568)$ be a tetraquark state?

Very recently, the D0 collaboration has reported the observation of a narrow structure, $X(5568)$, in the decay process $X(5568)\to B^0_s\pi^\pm$ using the 10.4${\rm fb}^{-1}$ data of $p\bar p$

Spectrum of the hidden-bottom and the hidden-charm-strange exotics in the dynamical diquark model

The lightest hidden-bottom tetraquarks in the dynamical diquark model fill an $S$-wave multiplet consisting of 12 isomultiplets. We predict their masses and dominant bottomonium decay channels using

Understanding the internal structures of X(4140), X(4274), X(4500) and X(4700)

We investigate the newly observed X(4500) and X(4700) based on the diquark–antidiquark configuration within the framework of QCD sum rules. Both of them may be interpreted as the D-wave

b decays: A factory for hidden charm multiquark states

We assume that the two hidden charm pentaquark discovered at $LHCb$ are built by the three light quarks and the $c \bar{c}$ pair, both colour octets. in relative P-wave for the $\frac{5}{2}^+$ state

Mass spectrum of the hidden-charm pentaquarks in the compact diquark model

A bstractThe LHCb collaboration have recently updated their analysis of the resonant J/ 𝜓 p mass spectrum in the decay Λb0$$ {\varLambda}_b^0 $$→ J/𝜓 p K−, making use of their combined Run 1 and

Spectroscopy and decays of the fully-heavy tetraquarks

We discuss the possible existence of the fully-heavy tetraquarks. We calculate the ground-state energy of the $$bb {\bar{b}} {\bar{b}}$$bbb¯b¯ bound state, where b stands for the bottom quark, in a

Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

We investigate a nonrelativistic model of tetraquarks, which are assumed to be compact and to consist of diquark-antidiquark pairs. We fit, for the first time, basically all currently known values

Production of charmed tetraquarks from B c and B decays

Hadronic states composed of multi-quark flavors may exist in reality since they are not prohibited by QCD. Compact four quark systems of color singlet are classified as tetraquarks. To understand the

A new look at the Y tetraquarks and $$\Omega _c$$Ωc baryons in the diquark model

We analyze the hidden charm P-wave tetraquarks in the diquark model, using an effective Hamiltonian incorporating the dominant spin–spin, spin–orbit and tensor interactions. We compare with other

Weak decays of stable doubly heavy tetraquark states

In the light of the recent discovery of the $\Xi^{++}_{cc}$ by LHCb collaboration, we study the stable doubly heavy tetraquarks. These states are compact exotic hadrons which can be approximated as



Implications of a DK molecule at 2.32 GeV

We discuss the implications of a possible quasinuclear DK bound state at 2.32 GeV. Evidence for such a state was recently reported in ${D}_{s}^{+}{\ensuremath{\pi}}^{0}$ by the BaBar Collaboration.

Is the anomalous decay ratio of D(sJ)(2632) due to isospin breaking

Quark pair annihilation into gluons is suppressed at large momenta due to the asymptotic freedom. As a consequence, mass eigenvalues of heavy states should be almost diagonal with respect to up and

Origin of the Weak-Interaction Angle. II

We present a theory of the origin of the weak-interaction angle $\ensuremath{\theta}$, based on a self-consistency condition linking weak, strong, and electromagnetic symmetry-breaking effects. The

Dalitz Plot Analysis of the Decay D + -->K - π + π + and Indication of a Low-Mass Scalar Kπ Resonance

We study the Dalitz plot of the decay D^+ --> K^- pi^+ pi^+ with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known K pi resonances and

Comprehensive four-quark interpretation of Ds(2317), Ds(2457), and Ds(2632).

The recently observed new member of the charm-strange family D(s)(2632), which has a surprisingly narrow width, is challenging the theory and a unitive description for all three new members is proposed, which is consistent with the data.

Hadron Masses in a Gauge Theory

We explore the implications for hadron spectroscopy of the "standard" gauge model of weak, electromagnetic, and strong interactions. The model involves four types of fractionally charged quarks, each

Chiral multiplets of heavy - light mesons

The recent discovery of a narrow resonance in ${D}_{s}{\ensuremath{\pi}}^{0}$ by the BaBar Collaboration is consistent with the interpretation of a heavy ${J}^{P}{(0}^{+}{,1}^{+})$ spin multiplet.

Hadron Spectroscopy (theory): Diquarks, Tetraquarks, Pentaquarks and no quarks

States beyond those expected in the simple constituent quark model are now emerging. I focus on the scalar glueball and its mixing with states in the $q\bar{q}$ nonet, and also on correlations in