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• W4372215162 abstract "Abstract The Λ baryon spectrum is studied within the SU(3) flavor symmetry in a constituent quark model. We found that it is rather difficult to accommodate some negative-parity Λ resonances as single q 2 s ( q = u , d quarks) states in the conventional three-quark picture. The ground <?CDATA ${q}^{3}sbar{q}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>3</mml:mn> </mml:mrow> </mml:msup> <mml:mi>s</mml:mi> <mml:mover accent=true> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> pentaquark mass spectrum is evaluated and a possible interpretation is proposed in the work: the observed Λ(1405)1/2 − , Λ(1670)1/2 − and Λ(1800)1/2 − are three-state mixtures of two p -wave q 2 s states and one ground <?CDATA ${q}^{3}sbar{q}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>3</mml:mn> </mml:mrow> </mml:msup> <mml:mi>s</mml:mi> <mml:mover accent=true> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> pentaquark state, so are the Λ(1520)3/2 − , Λ(1690)3/2 − and Λ(2050)3/2 − resonances. Both Λ(1405)1/2 − and Λ(1520)3/2 − contain considerable <?CDATA ${q}^{3}sbar{q}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>3</mml:mn> </mml:mrow> </mml:msup> <mml:mi>s</mml:mi> <mml:mover accent=true> <mml:mrow> <mml:mi>q</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> pentaquark components." @default.
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• W4372215162 date "2023-07-13" @default.
• W4372215162 modified "2023-09-30" @default.
• W4372215162 title "A possible interpretation of Λ baryon spectrum with pentaquark components" @default.
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• W4372215162 doi "https://doi.org/10.1088/1361-6471/acd2f2" @default.
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