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• W3047871181 abstract "We investigate the pentaquark system $qqqsoverline{q}$ in a framework of chiral quark model. Two structures, $(qqq)(soverline{q})$ and $(qqs)(qoverline{q})$, with all possible color, spin, flavor configurations are considered. The calculations show that there are several possible resonance states, $mathrm{ensuremath{Sigma}}ensuremath{pi}$ and $Noverline{K}$ state with $I{J}^{P}=0{frac{1}{2}}^{ensuremath{-}}$, ${mathrm{ensuremath{Sigma}}}^{*}ensuremath{pi}$ with $I{J}^{P}=0{frac{3}{2}}^{ensuremath{-}}$, ${mathrm{ensuremath{Sigma}}}^{*}ensuremath{rho}$ with $I{J}^{P}=0{frac{5}{2}}^{ensuremath{-}}$, $mathrm{ensuremath{Delta}}overline{K}$ with $I{J}^{P}=1{frac{3}{2}}^{ensuremath{-}}$, and $mathrm{ensuremath{Delta}}{overline{K}}^{*}$ with $I{J}^{P}=1{frac{5}{2}}^{ensuremath{-}}$. Where the $Noverline{K}$ state with $I{J}^{P}=0{frac{1}{2}}^{ensuremath{-}}$ can be used to explain the $mathrm{ensuremath{Lambda}}(1405)$, and together with another state $mathrm{ensuremath{Sigma}}ensuremath{pi}$ is related to the two-pole structure of the scattering amplitude proposed before. The decay properties of $mathrm{ensuremath{Lambda}}(1520)$ prevent the assignment of ${mathrm{ensuremath{Sigma}}}^{*}ensuremath{pi}$ with $I{J}^{P}=0{frac{3}{2}}^{ensuremath{-}}$ to $mathrm{ensuremath{Lambda}}(1520)$, although the energy $ensuremath{approx}1518phantom{rule{0.28em}{0ex}}mathrm{MeV}$ of ${mathrm{ensuremath{Sigma}}}^{*}ensuremath{pi}$ is close to experimental value of $mathrm{ensuremath{Lambda}}(1520)$. Other resonance states generally have a large width." @default.
• W3047871181 created "2020-08-13" @default.
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• W3047871181 date "2021-01-26" @default.
• W3047871181 modified "2023-10-17" @default.
• W3047871181 title "Investigation of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>q</mml:mi><mml:mi>q</mml:mi><mml:mi>q</mml:mi><mml:mi>s</mml:mi><mml:mover><mml:mi>q</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:mrow></mml:math> pentaquarks in a chiral quark model" @default.
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• W3047871181 doi "https://doi.org/10.1103/physrevc.103.015203" @default.
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