The Ω(2012) as a Hadronic Molecule Article Swipe
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1088/0256-307x/41/8/081402
· OA: W4400137785
Recently, a new excited baryon state, Ω (2012), was observed in the invariant mass spectra of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> </mml:mrow> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:math> by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the Ω (2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2 − from the coupled-channels interactions of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mover accent="true"> <mml:mi>K</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mn>1530</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> </mml:math> and ηΩ in s -wave and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mover accent="true"> <mml:mi>K</mml:mi> <mml:mo stretchy="false">¯</mml:mo> </mml:mover> <mml:mi>Ξ</mml:mi> </mml:mrow> </mml:math> in d -wave. Additionally, alternative explanations for the Ω (2012) resonance are also discussed.
