Interaction and Identification of the Meson-Baryon molecules

Rathaud, D. P.; Rai, Ajay Kumar

doi:10.48550/arxiv.1808.05815

Cited by 2 publications

(5 citation statements)

References 35 publications

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“…In the study of bound state problems in Ref. [370], the authors proposed a one-boson-exchange potential model by adding a screen Yukawa-like potential. From their results, the P c (4450) was interpreted as an I(J…”

Section: Q Qqqqmentioning

confidence: 99%

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Pentaquark and Tetraquark states

Liu,

Chen,

Chen

et al. 2019

Preprint

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The past seventeen years have witnessed tremendous progress on the experimental and theoretical explorations of the multiquark states. The hidden-charm and hidden-bottom multiquark systems were reviewed extensively in Ref. [1]. In this article, we shall update the experimental and theoretical efforts on the hidden heavy flavor multiquark systems in the past three years. Especially the LHCb collaboration not only confirmed the existence of the hidden-charm pentaquarks but also provided strong evidence of the molecular picture. Besides the well-known XY Z and P c states, we shall discuss more interesting tetraquark and pentaquark systems either with one, two, three or even four heavy quarks. Some very intriguing states include the fully heavy exotic tetraquark states QQ Q Q and doubly heavy tetraquark states QQq q, where Q is a heavy quark. The QQ Q Q states may be produced at LHC while the QQq q system may be searched for at BelleII and LHCb. Moreover, we shall pay special attention to various theoretical schemes such as the chromomagnetic interaction (CMI), constituent quark model, meson exchange model, heavy quark and heavy diquark symmetry, QCD sum rules, Faddeev equation for the three body systems, Skyrme model and the chiral quark-soliton model, and the lattice QCD simulations. We shall emphasize the model-independent predictions of various models which are truly/closely related to Quantum Chromodynamics (QCD). For example, the chromomagnetic interaction arises from the gluon exchange which is fundamental and universal in QCD and responsible for the mixing and mass splitting of the conventional mesons and baryons within the same multiplet. The same CMI

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Section: Q Qqqqmentioning

confidence: 99%

“…The authors of Ref. [370] presented a study of various meson-baryon and baryon-baryon/antibaryon states in a one-boson-exchange potential model compensated by a screened Yukawa-like potential. A series of double-heavy molecules were obtained.…”

Section: Qqqq Qmentioning

confidence: 99%

Pentaquark and Tetraquark states

Liu,

Chen,

Chen

et al. 2019

Preprint

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“…Those are listed in Table I, where several J P contribute to a given irrep Γ P . Therefore partial wave operators (8) are subduced to chosen row r of irrep Γ…”

Section: Two-hadron Operators and Expected Degeneracies In The Non-in...mentioning

confidence: 99%

“…) Let us explicitly present also a more non-trivial example, where N J/ψ with p 2 = 1 transform according to H − . Here the relations (8,9) lead to a number of linearlydependent operators…”

Section: Two-hadron Operators and Expected Degeneracies In The Non-in...mentioning

confidence: 99%

“…They were predicted in the coupled channel dynamics in [4,5], where the significant component D * Σ c couples also to N J/ψ via the vector meson exchange. They were studied as hadronic molecules of a charmed meson and a charmed baryon, for example in [6][7][8][9][10][11], or charmonium and nucleon, for example in [12]. All listed studies report to find an indication for P c .…”

Section: Introductionmentioning

confidence: 99%

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Nucleon-$J/ψ$ and nucleon-$η_{c}$ scattering in $P_{c}$ pentaquark channels from LQCD

Skerbis,

Prelovsek

2018

Preprint

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The lattice QCD simulation of N J/ψ and N ηc scattering is performed at mπ 266 MeV in channels with all possible J P . This includes J P = 3/2 ± and 5/2 ± where LHCb discovered Pc(4380) and Pc(4450) 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 Pc 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 non-interacting 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 N J/ψ channel with other two-hadron channels might be responsible for Pc resonances in experiment. One of the challenges of this study is that up to six degenerate J/ψ(p)N (−p) eigenstates are expected in the non-interacting limit due non-zero spins of J/ψ and N , and we establish all of them in the spectra.

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Interaction and Identification of the Meson-Baryon molecules

Cited by 2 publications

References 35 publications

Pentaquark and Tetraquark states

Pentaquark and Tetraquark states

Nucleon-$J/ψ$ and nucleon-$η_{c}$ scattering in $P_{c}$ pentaquark channels from LQCD

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