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Isola, Claudia; Ladisa, Massimo; Nardulli, G.; Santorelli, Pietro

doi:10.1103/physrevd.68.114001

Cited by 219 publications

(167 citation statements)

References 58 publications

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“…The information about the effective coupling constants between the heavy meson and the light vector mesons is very scarce until now, especially those related with the P-wave heavy mesons. By vector meson dominance, β is estimated to be about 0.9 [45]. Ref.…”

Section: Appendix A: the Potential From Light Vector Mesons ρ And ω Ementioning

confidence: 99%

“…For several typical values of gh, we vary the cutoff Λ from a small value until we find a solution which lies below the D 1 D threshold. Here the 45] 0.59 ± 0.07 ± 0.01 combining the CLEO's results on D * decay width [46] 0.46 ± 0.04 through a constituent quark-meson model [47] 0.53 including one loop corrections without positive parity states [47] 0.65 including one loop corrections with positive parity states [27] 0.44 ± 0.16 from QCD sum rule [48] 0.39 ± 0.16 from QCD sum rule [49] 0.32 ± 0.02 [28] 0.75 from non-relativistic quark model Referenceh Remark [28] |h| = 0.87 from non-relativistic quark [50] 0.91 +0.5 Table II, we see that one can get a molecular state consistent with Y(4260), given appropriate value for gh and a reasonable cutoff Λ in the range 1-2 GeV. However, the existence of a bound state with I G (J P ) = 1 − (1 − ) require that the value of Λ should be at least larger than 4 GeV.…”

Section: The Effective Potentials Related With Y(4260) and Z + 2 mentioning

confidence: 99%

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AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

201

137

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In this work, we have investigated whether Y(4260) and Z + 2 (4250) could be D1D or D0D * molecules in the framework of meson exchange model. The off-diagonal interaction induced by π exchange plays a dominant role. The σ exchange has been taken into account, which leads to diagonal interaction. The contribution of σ exchange is not favorable to the formation of molecular state with I G (J PC ) = 0 − (1 −− ), however, it is beneficial to the binding of molecule with I G (J P ) = 1 − (1 − ). Light vector meson exchange leads to diagonal interaction as well. For Z + 2 (4250), the contribution from ρ and ω exchange almost cancels each other. For the currently allowed values of the effective coupling constants and a reasonable cutoff Λ in the range 1-2 GeV, We find that Y(4260) could be accommodated as a D1D and D0D * molecule, whereas the interpretation of Z + 2 (4250) as a D1D or D0D * molecule is disfavored. The bottom analog of Y(4260) and Z + 2 (4250) may exist, and the most promising channels to discovery them are π + π − Υ and π + χ b1 respectively.

show abstract

Section: Appendix A: the Potential From Light Vector Mesons ρ And ω Ementioning

confidence: 99%

Section: The Effective Potentials Related With Y(4260) and Z + 2 mentioning

confidence: 99%

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

201

137

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show abstract

“…The coupling constants β and λ are fixed by the vector meson decays [57]. The coupling constant for the sigma meson is given by g s = −g π /2 √ 6 with the 0 + → 0 − π coupling constant g π = 3.73 [58].…”

Section: Interactionsmentioning

confidence: 99%

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯()Λ
Yamaguchi
¹
,
Santopinto
²

2017
Phys. Rev. D*
66
2
41
0
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The recent observation of two hidden-charm pentaquark states by LHCb collaborations prompted us to investigate the exotic states close to theDΛ c ,D * Λ c ,DΣ c ,DΣ * c ,D * Σ c andD * Σ * c thresholds. We therefore studied the hadronic molecules that form the coupled-channel system ofD ( * ) Λ c andD ( * ) Σ ( * ) c . As the heavy quark spin symmetry manifests the mass degenerations ofD andD * mesons, and of Σ c and Σ * c baryons, the coupled channels ofD ( * ) Σ ( * ) c are important in these molecules. In addition, we consider the coupling to thē D ( * ) Λ c channel whose thresholds are near theD ( * ) Σ ( * ) c thresholds, and the coupling to the state with nonzero orbital angular momentum mixed by the tensor force. This full coupled channel analysis ofD ( * ) Λ c −D ( * ) Σ ( * ) c with larger orbital angular momentum has never been performed before. By solving the coupled-channel Schrödinger equations with the one meson exchange potentials that respected to the heavy quark spin and chiral symmetries, we studied the hidden-charm hadronic molecules with I(J P ) = 1/2(3/2 ± ) and 1/2(5/2 ± ). We conclude that the J P assignment of the observed pentaquarks is 3/2 + for P + c (4380) and 5/2 − for P + c (4450), which is agreement with the results of the LHCb analysis. In addition, we give predictions for other J P = 3/2 ± states at 4136.0, 4307.9 and 4348.7 MeV in J P = 3/2 − , and 4206.7 MeV in J P = 3/2 + , which can be further investigated by means of experiment.

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“…where the coupling constant g = 0.59 ± 0.07 ± 0.01 was extracted from the D * decay width [259] and g 1 = 0.94 fixed in Refs. [258,248].…”

mentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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Charming penguin contributions inB→K*π,K(ρ,ω

Cited by 219 publications

References 58 publications

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯()Λ
Yamaguchi
¹
,
Santopinto
²

2017
Phys. Rev. D*
66
2
41
0
View full text Add to dashboard Cite

The hidden-charm pentaquark and tetraquark states

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Charming penguin contributions inB→K*π,K(ρ,ω

Cited by 219 publications

References 58 publications

AreY(4260)andZ2+(4250)Ding1 2009Phys. Rev. D

AreY(4260)andZ2+(4250)Ding1 2009Phys. Rev. D

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯(*)ΛYamaguchi1, Santopinto2 2017Phys. Rev. D662410View full textAdd to dashboardCite

The hidden-charm pentaquark and tetraquark states

Contact Info

Product

Resources

About

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯()Λ
Yamaguchi
¹
,
Santopinto
²

2017
Phys. Rev. D*
66
2
41
0
View full text Add to dashboard Cite