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Quark-model search for compact ccuds pentaquark states

A potential quark model is used to search for a 𝑃0𝑐⁢¯𝑐⁢𝑠=(𝑐⁢¯𝑐⁢𝑢⁢𝑑⁢𝑠)0, 𝐽𝑃 =1/2− pentaquark state that has recently been observed experimentally by LHCb Collaboration at 4338.2 MeV, with a width of 7.0 MeV and high statistical significance >15⁢𝜎. Our model Hamiltonian reproduces the masses of the...

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Bibliographic Details
Main Authors: Hiyama, Emiko (Author) , Hosaka, Atsushi (Author) , Oka, Makoto (Author) , Wolschin, Georg (Author)
Format: Article (Journal)
Language:English
Published: 4 March 2026
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2026, Volume: 113, Issue: 5, Pages: 1-11
ISSN:1550-2368
DOI:10.1103/j66g-k5g5
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/j66g-k5g5
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/j66g-k5g5
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Author Notes:Emiko Hiyama, Atsushi Hosaka, Makoto Oka, and Georg Wolschin
Description
Summary:A potential quark model is used to search for a 𝑃0𝑐⁢¯𝑐⁢𝑠=(𝑐⁢¯𝑐⁢𝑢⁢𝑑⁢𝑠)0, 𝐽𝑃 =1/2− pentaquark state that has recently been observed experimentally by LHCb Collaboration at 4338.2 MeV, with a width of 7.0 MeV and high statistical significance >15⁢𝜎. Our model Hamiltonian reproduces the masses of the low-lying charmed and strange hadrons. We use the Gaussian expansion method to solve the five-body Schrödinger equation. Employing the real scaling method, including the relevant meson-baryon thresholds explicitly, sharp resonances are distinguished from the meson-baryon scattering states. We incorporate new color states of the color-octet meson and baryon configurations as well as the color-singlet configurations for the five-quark states. We find no 𝐽𝑃 =1/2− resonance close to the observed state, and also none in the 𝐽𝑃 =3/2− state. This increases the likelihood that 𝑃0𝑐⁢¯𝑐⁢𝑠 is a Ξ𝑐⁢¯𝐷 hadronic molecule rather than a compact state.
Item Description:Im Titel ist das Wort "ccuds" kursiv geschrieben, das zweite c hat ein Makron darüber
Gesehen am 19.05.2026
Physical Description:Online Resource
ISSN:1550-2368
DOI:10.1103/j66g-k5g5

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