The enigmatic Ξ(2030) particle, once thought to consist of three quarks, may actually be a molecular pentaquark – an exotic hadron comprising five quarks. That is the conclusion of Chinese physicists Cai Cheng and Jing-wen Feng at Sichuan Normal University and Yin Huang at Southwest Jiaotong University. They employed a simplified strong interaction theory to calculate the decay rate of the exotic hadron, concluding that it comprises five quarks.
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