Diquark-Antidiquark with open charm in QCD sum rules

Abstract

Using the QCD sum rule approach we investigate the possible four-quark structure of the recently observed charmed scalar mesons $D_0^0(2308)$ (BELLE) and $D_0^{0,+}(2405)$ (FOCUS) and also of the very narrow $D_{sJ}^{+}(2317)$, firstly observed by BABAR. We use diquak-antidiquark currents and work to the order of $m_s$ in full QCD, without relying on $1/m_c$ expansion. Our results indicate that a four-quark structure is acceptable for the resonances observed by BELLE and BABAR: $D_0^0(2308)$ and $D_{sJ}^{+}(2317)$ respectively, but not for the resonances observed by FOCUS: $D_0^{0,+}(2405)$.

6 pages, 5 eps figures; Contribution to the 'Workshop on Light-Cone QCD and Nonperturbative Hadron Physics 2005 (LC2005)', Cairns-Australia

References in corpus (21)

• Diquark-Antidiquarks with Hidden or Open Charm and the Nature of X(3872)
• Diquarks and Exotic Spectroscopy
• Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2
• Observation of a Narrow Resonance of Mass 2.46 GeV/c^2 Decaying to D_s^*+ pi^0 and Confirmation of the D_sJ^* (2317) State
• Scalar mesons above and below 1 GeV
• Implications of a DK Molecule at 2.32 GeV
• Observed D_s(2317) and tentative D(2100-2300) as the charmed cousins of the light scalar nonet
• Observation of the DsJ(2317) and DsJ(2457) in B decays
• Study of B- => D**0 pi-(D**0 => D(*)+ pi-) decays
• B Decays as Spectroscope for Charmed Four-quark States
• Study of the $D_s^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay and measurement of $f_0$ masses and widths
• Comment on the new $D_s^{(\ast )+}{\pi }^0$ resonances
• BABAR resonance as a new window of hadron physics
• Measurement of Masses and Widths of Excited Charm Mesons $D_2^{\ast }$ and Evidence for Broad States
• Understanding the $D_{sJ}^{+}(2317)$ and $D_{sJ}^{+}(2460)$ with Sum Rules in HQET
• Description of the $D_s^{\ast }(2320)$ resonance as the $D\pi$ atom
• Open Charm and Beauty Chiral Multiplets in QCD
• The DsJ(2317): what can the Lattice say?
• QCD sum rule approach for the light scalar mesons as four-quark states
• The spectrum of D_s mesons from lattice QCD
• Semileptonic D decay into scalar mesons: a QCD sum rule approach

Cited by in corpus (11)

• Axial Resonances in the Open and Hidden Charm Sectors
• Heavy baryon spectroscopy in QCD
• Heavy-strange meson molecules and possible candidates $D_{s0}^{\ast }(2317)$, $D_{s1}(2460)$, and $X_0(2900)$
• Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules
• Hadronic-loop induced mass shifts in scalar heavy-light mesons
• Resonant state $D_0^{\ast }(2400)$ in the quasi-two-body $B$ meson decays
• Masses and Mixing of $cq\bar{q}\bar{q}$ Tetraquarks Using Glozman-Riska Hyperfine Interaction
• Discussions on Stability of Diquarks
• Masses and radiative decay widths of the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\prime }(2460)$ and their bottom analogs
• Predictions of α-decay half-lives for neutron-deficient nuclei with the aid of artificial neural network
• Analysis of the hadronic molecules $DK$, $D^{\ast }K$, $D{K}^{\ast }$ and their bottom analogs with QCD sum rules