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 and 
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 molecular states from one boson exchange

Liu, Mingzhu; Wu, Tian-Wei; Xie, Ju-Jun; Valderrama, Manuel Pavón; Geng, Li-Sheng

doi:10.1103/physrevd.98.014014

Cited by 35 publications

(22 citation statements)

References 85 publications

(118 reference statements)

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“…We notice that form factors of a higher polarity prefer larger values of Λ: for a monopolar form factor the ideal cutoff is in the vicinity of Λ ≃ 1 GeV, while for a dipolar Λ ≃ 1.5 GeV 3. In a previous work[55] we obtained Λ = 1.04 +0 18. −0.10 GeV, which is a bit higher.…”

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confidence: 60%

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Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

et al. 2019

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Heavy-quark symmetry as applied to heavy hadron systems implies that their interactions are independent of their heavy-quark spin (heavy-quark spin symmetry) and heavy flavour contents (heavy flavour symmetry). In the molecular hypothesis the X(3872) resonance is a 1 ++ D * D bound state. If this is the case, the application of heavy-quark symmetry to a molecular X(3872) suggests the existence of a series of partner states, the most obvious of which is a possible 2 ++ D * D * bound state for which the two-body potential is identical to that of the 1 ++ D * D system, the reason being that these two heavy hadron-antihadron states have identical light-spin content. As already discussed in the literature this leads to the prediction of a partner state at 4012 MeV, at least in the absence of other dynamical effects which might affect the location of this molecule. However the prediction of further heavy-quark symmetry partners cannot be done solely on the basis of symmetry and requires additional information. We propose to use the one boson exchange model to fill this gap, in which case we will be able to predict or discard the existence of other partner states. Besides the isoscalar 2 ++ D * D * bound state, we correctly reproduce the location and quantum numbers of the isovector hidden-bottom Z b (10610) and Z b (10650) molecular candidates. We also predict the hidden-bottom 1 ++ B * B * and 2 ++ B * B * partners of the X(3872), in agreement with previous theoretical speculations, plus a series of other states. The isoscalar, doubly charmed 1 + DD * and D * D * molecules and their doubly bottomed counterparts are likely to bind, providing a few instances of explicitly exotic systems.2 −D * Σ * c state. Yet, with the exception of the doubly charmed pentaquark family, heavyquark symmetry alone is in general not able to determine the

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confidence: 60%

“…−0.10 GeV, which is a bit higher. The reason for the difference is that in Ref [55]. the effective pion mass for the one pion exchange piece of the OBE potential was taken to be µ π = 138 MeV instead of µ π = 0.…”

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confidence: 99%

Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

et al. 2019

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“…Starting from early quark models [1], work along this line has been rather extensive and fruitful [2][3][4][5][6][7][8]. QCD lattice has also contributed to this area [9][10][11] and dynamical models building molecular states in coupled meson-baryon channels [12][13][14][15][16][17][18][19][20][21][22][23][24] have also brought their share to this intense research. There are also many review papers on the subject to which we refer the reader [25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Description of the $$\Xi _c$$ Ξ c and $$\Xi _b$$ Ξ b states as molecular states

Pavao

Debastiani

et al. 2019

Eur. Phys. J. C

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In this work we study several c and b states dynamically generated from the meson-baryon interaction in coupled channels, using an extension of the local hidden gauge approach in the Bethe-Salpeter equation. These molecular states appear as poles of the scattering amplitudes, and several of them can be identified with the experimentally observed c states, including the c (2790), c (2930), c (2970), c (3055) and c (3080). Also, for the recently reported b (6227) state, we find two poles with masses and widths remarkably close to the experimental data, for both the J P = 1/2 − and J P = 3/2 − sectors.

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“…[13]. These studies are often based on the phenomenological meson-exchange models [14][15][16][17]. Several studies considered compact diquark-diquark-antiquark internal structure and found P c , e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

Nucleon- J/ψ and nucleon- ηc scattering in P
Skerbis
¹
,
Prelovšek
²

2019
Phys. Rev. D
49
0
29
0
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The lattice QCD simulation of NJ=ψ and Nη c scattering is performed at m π ≃ 266 MeV in channels with all possible J P. This includes J P ¼ 3=2 AE and 5=2 AE where LHCb discovered P c ð4380Þ and P c ð4450Þ pentaquark states in proton-J=ψ decay. This is the first lattice simulation that reaches the energies 4.3-4.5 GeV where pentaquarks reside. Several decay channels are open in this energy region, and we explore the fate of P c in the one-channel approximation in this work. Energies of eigenstates are extracted for the nucleon-charmonium system at zero total momentum for all quantum numbers, i.e., six lattice irreducible representations. No significant energy shifts are observed. The number of the observed lattice eigenstates agrees with the number expected for noninteracting charmonium and nucleon. Thus, we do not find any strong indication for a resonance or a bound state in these exotic channels within one-channel approximation. This possibly indicates that the coupling of the NJ=ψ channel with other two-hadron channels might be responsible for P c resonances in experiment. One of the challenges of this study is that up to six degenerate J=ψðpÞNð−pÞ eigenstates are expected in the noninteracting limit due nonzero spins of J=ψ and N, and we establish all of them in the spectra.

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DΞ and D*Ξ molecular states from one boson exchange

Cited by 35 publications

References 85 publications

Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

Description of the $$\Xi _c$$ Ξ c and $$\Xi _b$$ Ξ b states as molecular states

Nucleon- J/ψ and nucleon- ηc scattering in P
Skerbis
¹
,
Prelovšek
²

2019
Phys. Rev. D
49
0
29
0
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DΞ and D*Ξ molecular states from one boson exchange

Cited by 35 publications

References 85 publications

Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?

Description of the $$\Xi _c$$ Ξ c and $$\Xi _b$$ Ξ b states as molecular states

Nucleon- J/ψ and nucleon- ηc scattering in PSkerbis1, Prelovšek2 2019Phys. Rev. D490290View full textAdd to dashboardCite

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About

Nucleon- J/ψ and nucleon- ηc scattering in P
Skerbis
¹
,
Prelovšek
²

2019
Phys. Rev. D
49
0
29
0
View full text Add to dashboard Cite