Holographic charm and bottom pentaquarks I: Mass spectra with spin effects

Abstract

We revisit the three non-strange pentaquarks $[\frac{1}{2}{\frac{1}{2}}^{-}{]}_{S=0,1}$ and $[\frac{1}{2}{\frac{3}{2}}^{-}{]}_{S=1}$ predicted using the holographic dual description, where chiral and heavy quark symmetry are manifest in the triple limit of a large number of colors, large quark mass and strong ${}^{\prime }$t Hooft gauge coupling. In the heavy quark limit, the pentaquarks with internal heavy quark spin $S$ are all degenerate. The holographic pentaquarks are dual to an instanton bound to heavy mesons in bulk, without the shortcomings related to the nature of the interaction and the choice of the hard core inherent to the molecular constructions. We explicitly derive the spin-spin and spin-orbit couplings arising from next to leading order in the heavy quark mass, and lift totally the internal spin degeneray, in fair agreement with the newly reported charmed pentaquarks from LHCb. New charm and bottom pentaquark states are predicted.

32 pages, 3 figures

References in corpus (9)

• Multiquark Resonances
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
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• Electromagnetic Baryon Form Factors from Holographic QCD
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• Holographic charm and bottom pentaquarks II: Open and hidden decay widths
• Holographic heavy-baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons

Cited by in corpus (5)

• Gravitational form factors of pion from top-down holographic QCD
• Holographic charm and bottom pentaquarks II: Open and hidden decay widths
• Investigation of a candidate spin-$\frac{1}{2}$ hidden-charm triple strange pentaquark state $P_{csss}$
• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons
• Scalar-glueball-mediated scale-anomaly dominance of the confining pressure of the pion in holographic QCD