Doubly charmed exotic mesons: A gift of nature?

Caramés, Teresa Fernández; Valcarce, A.; Vijande, J.

doi:10.1016/j.physletb.2011.04.023

Cited by 79 publications

(52 citation statements)

References 24 publications

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“…Only the channel (I)J P = (0)1 + is attractive enough to be bound [11]. This is the same state that was found to be bound in the four-quark study.…”

Section: Meson Spectroscopy Beyond the Naive Quark-modelsupporting

confidence: 67%

Heavy hadron spectroscopy: A quark model perspective

et al. 2013

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We present recent results of hadron spectroscopy and hadron-hadron interaction from the perspective of constituent quark models. We pay special attention to the role played by higher order Fock space components in the hadron spectra and the connection of this extension with the hadron-hadron interaction. The main goal of our description is to obtain a coherent understanding of the lowenergy hadron phenomenology without enforcing any particular model, to constrain its characteristics and learn about low-energy realization of the theory.

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“…Only the channel (I)J P = (0)1 + is attractive enough to be bound [11]. This is the same state that was found to be bound in the four-quark study.…”

Section: Meson Spectroscopy Beyond the Naive Quark-modelsupporting

confidence: 67%

Heavy hadron spectroscopy: A quark model perspective

et al. 2013

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“…We consider the AL1 model, where the bbūd state is bound by about 150 MeV [7] while the ccūd state is bound by about 3 MeV [11]. The chromomagnetic interaction, mesons does not present a bound state [19,21], the weaker coupling between DD * and D * D * than betweenBB * andB * B * , drives to a reduction of the binding energy from 150 MeV to 3 MeV. If we now consider the isoscalar bcūd J P = 1 + state, the mass difference between theB * D andB * D * thresholds is the same as in the charm case, but the chromomagnetic interaction involving the bottom quark is weakened by a factor m b /m c ∼ 3.…”

Section: Resultsmentioning

confidence: 99%

Exotic bcq¯q¯ four-quark states

2019

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We carry out a systematic study of exotic QQ ′qq four-quark states containing distinguishable heavy flavors, b and c. Different generic constituent models are explored in an attempt to extract general conclusions. The results are robust, predicting the same sets of quantum numbers as the best candidates to lodge bound states independently of the model used, the isoscalar J P = 0 + and J P = 1 + states. The first state would be strong and electromagnetic-interaction stable while the second would decay electromagnetically toBDγ. Isovector states are found to be unbound, preventing the existence of charged partners. The interest on exotic heavy-light tetraquarks with non identical heavy-flavors comes reinforced by the recent estimation of the production rate of the isoscalar bcūd J P = 1 + state, two orders of magnitude larger than that of the bbūd analogous state.

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“…Up to now, no experimental candidates for the doubly charmed tetraquark states ccqq or qq cc have been observed. There have been several works on the doubly heavy tetraquark states, such as potential quark models [17][18][19][20][21][22][23], QCD sum rules [24][25][26], heavy quark symmetry [27][28][29], lattice QCD [30][31][32], etc.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the scalar, axialvector, vector, tensor doubly charmed tetraquark states with QCD sum rules

Wang

Yan

2018

Eur. Phys. J. C

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In this article, we construct the axialvectordiquark-axialvector-antidiquark type currents to interpolate the scalar, axialvector, vector, tensor doubly charmed tetraquark states, and study them with QCD sum rules systematically by carrying out the operator product expansion up to the vacuum condensates of dimension 10 in a consistent way, the predicted masses can be confronted with the experimental data in the future. We can search for those doubly charmed tetraquark states in the Okubo-Zweig-Iizuka super-allowed strong decays to the charmed-meson pairs.

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Doubly charmed exotic mesons: A gift of nature?

Cited by 79 publications

References 24 publications

Heavy hadron spectroscopy: A quark model perspective

Heavy hadron spectroscopy: A quark model perspective

Exotic bcq¯q¯ four-quark states

Analysis of the scalar, axialvector, vector, tensor doubly charmed tetraquark states with QCD sum rules

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